Pasquevich / Renteria / Baggio Saitovitch HFI/NQI 2007

Proceedings of the 14th International Conference on Hyperfine Interactions and 18th International Symposium on Nuclear Quadrupole Interactions, (HFI/NQI 2007) Iguazú Falls, Brazil, 5-10 August, 2007
2009
ISBN: 978-3-540-85320-6
Verlag: Springer Berlin Heidelberg
Format: PDF
Kopierschutz: 1 - PDF Watermark

E-Book, Englisch, 690 Seiten

This volume of proceedings includes new and original scientific results along with recent developments in instrumentation and methods, in invited and contributed papers. Researchers and graduate students interested in hyperfine interaction detected by nuclear radiation as well as nuclear quadrupole interactions detected by resonance methods in the areas of materials, biological and medical science will find this volume indispensable.

Autoren/Hrsg.

Pasquevich, Alberto

Renteria, M.

Baggio Saitovitch, Elisa Maria

Petrilli, Helena M.

Inhaltsverzeichnis

1;Title Page
;3
2;Copyright Page
;4
3;Table of contents
;5
4;Foreword;16
5;Conference Photo Participants;20
6;EFG calculations for Cu2+ compounds;23
6.1;Abstract;23
6.2;Keywords;23
6.3;1 Introduction;23
6.4;2 Data;24
6.5;3 Calculation method;24
6.6;4 Results;25
6.7;5 EFG analysis;25
6.8;6 Other properties;26
6.9;7 Conclusions;27
6.10;References;27
7;First principles study of nuclear quadrupole interactions in the molecular solid BF3 and the nature of binding between the molecules
;28
7.1;Abstract;28
7.2;Keywords;28
7.3;1 Introduction;29
7.4;2 Procedure;29
7.5;3 Results and discussion;30
7.6;4 Conclusion;32
7.7;References;32
8;Hyperfine interactions of half-metallic diluted antiferromagnetic semiconductors
;34
8.1;Abstract;34
8.2;Keywords;34
8.3;1 Introduction;34
8.4;2 Theoretical framework;35
8.5;3 Results and discussions;36
8.6;4 Summary;38
8.7;References;38
9;Electronic properties of HfXY intermetallic compounds (X =Si, Ge; Y =S, Se, Te)
;39
9.1;Abstract;39
9.2;Keywords;39
9.3;1 Introduction;39
9.4;2 Results and discussion;41
9.5;3 Summary;42
9.6;References;43
10;Electronic properties of Hf2X intermetallic compounds(X =AI, Si, Ni, Ga and Ge)
;44
10.1;Abstract;44
10.2;Keywords;44
10.3;1 Introduction;44
10.4;2 Results and discussion;45
10.5;3 Summary;48
10.6;References;48
11;Theory of electronic structure and nuclear quadrupole interactions in the BF3-NH3complex and methyl derivatives
;49
11.1;Abstract;49
11.2;Keywords;50
11.3;1 Introduction;50
11.4;2 Procedure;50
11.5;3 Results and discussion;51
11.6;4 Conclusion;53
11.7;References;53
12;Nuclear quadrupole interactions and electronic structure of BF3 . H20 complex
;55
12.1;Abstract;55
12.2;Keywords;55
12.3;1 Introduction;55
12.4;2 Procednre;56
12.5;3 Results and discussion;58
12.6;4 Conclusion;60
12.7;References;60
13;Understanding of nuclear quadrupole interactions of 35CI, 79Br and 129I and binding energies of solid halogens at first-principles level
;61
13.1;Abstract;61
13.2;Keywords;62
13.3;1 Introduction;62
13.4;2 Procedure;62
13.5;3 Results and discussion;64
13.6;4 Conclusion;66
13.7;References;66
14;Nuclear spin manipulation in interfaces of diluted magnetic semiconductors
;68
14.1;Abstract;68
14.2;Keywords;68
14.3;1 Introduction;68
14.4;2 Calculation;69
14.5;3 Results and discussions;69
14.6;References;72
15;Magnetic properties of Heisenberg triangular antiferromagnet VIS cluster studied by NMR
;73
15.1;Abstract;73
15.2;Keywords;73
15.3;1 Introduction;73
15.4;2 Experimental;74
15.5;3 Results and discussion;74
15.6;References;76
16;Temperature dependence of the magnetic hyperfine field at cerium impurity in Co
;77
16.1;Abstract;77
16.2;Keywords;77
16.3;1 Introduction;77
16.4;2 Experimental procedure;78
16.5;3 Results and discussion;78
16.6;References;81
17;Magnetic hyperfine fields at Gd and in sites in GdPdIn compound
;82
17.1;Abstract;82
17.2;Keywords;82
17.3;1 Introduction;82
17.4;2 Experimental;83
17.5;3 Results and discussion;83
17.6;References;86
18;Study of hyperfine interactions in the intermetallic compound CePd2Si2 using PAC technique with 111Cd as probe nuclei
;87
18.1;Abstract;87
18.2;Keywords;87
18.3;1 Introduction;87
18.4;2 Experiment;88
18.5;3 Results and discussions;88
18.6;References;90
19;Mössbauer characterization of Fe-doped ZnO prepared by mechanical milling
;92
19.1;Abstract;92
19.2;Keywords;92
19.3;1 Introduction;92
19.4;2 Experimental;93
19.5;3 Results and discussion;93
19.5.1;3.1 XRD measurements;93
19.5.2;3.2 SEM images;94
19.5.3;3.3 Mossbauer spectroscopy;95
19.6;4 Conclusions;97
19.7;References;97
20;Temperature dependence of the hyperfine fields in NiFe2O4 and CuFe2O4 oxides
;98
20.1;Abstract;98
20.2;Keywords;98
20.3;References;103
21;Hyperfine interactions at R and In sites in RNiIn (R =Gd, Tb, Dy, Ho) compounds measured by perturbed angular correlation spectroscopy
;105
21.1;Abstract;105
21.2;Keywords;105
21.3;1 Introduction;106
21.4;2 Experimental procedure;106
21.5;3 Results and discussion;107
21.6;References;109
22;Synthesis and thermal transformations of zinc-substituted magnetites
;111
22.1;Abstract;111
22.2;Keywords;111
22.3;1 Introduction;111
22.4;2 Experimental details;112
22.5;3 Results and discussion;113
22.6;4 Conclusions;115
22.7;References;115
23;Magnetic characterization of maghemite nanoparticles dispersed in surface-treated polymeric template
;116
23.1;Abstract;116
23.2;Keywords;116
23.3;1 Introduction;116
23.4;2 Experimental;117
23.5;3 Results and discussion;117
23.6;References;120
24;Investigation of the different nature of magnetic hyperfine fields of Ce probes in Gd and Co matrices
;121
24.1;Abstract;121
24.2;Keywords;121
24.3;1 Introduction;121
24.4;2 Experimental resnIts;122
24.5;3 Details of the calculations;122
24.6;4 Discussion;123
24.7;References;125
25;Magnetic properties of rare-earth permanent magnets under a high radiation environment
;126
25.1;Abstract;126
25.2;Keywords;126
25.3;1 Introduction;126
25.4;2 Experiments;127
25.4.1;2.1 Demagnetization;127
25.4.2;2.2 TDPAC measurement;127
25.5;3 Discussion;129
25.6;References;129
26;Defects in semiconductors-resultsfrom Mössbauer spectroscopy
;130
26.1;Abstract;130
26.2;Keywords;130
26.3;1 Introduction;130
26.4;2 Elementary point defects in 111-V semiconductors;131
26.5;3 The fate of ion-implanted s7Mn.S7Fe in silicon, Sit - xGex alloys and other group IV elements and compounds ;133
26.5.1;3.1 Fe in silicon and group IV elements;133
26.5.2;3.2 The diffusivity of interstitial Fei in silicon and SiGe alloys
;136
26.5.3;3.3 Interactions of recoil-created interstitial Fei
in silicon;137
26.5.4;3.4 Fe in diamond and SiC;140
26.5.5;References;142
27;Site preferences of indium impurity atoms in intermetallics having AI3Ti or AI3Zr crystal structures
;143
27.1;Abstract;143
27.2;Keywords;143
27.3;References;147
28;Phosphorus-doped silicon under uniaxial tensile strain investigated by PAC
;148
28.1;Abstract;148
28.2;Keywords;148
28.3;1 Introduction;148
28.4;2 Experimental details;149
28.5;3 Results and discussion;149
28.6;4 Conclusions;151
28.7;References;152
29;The gap level of bond-centred muonium in diamond;153
29.1;Abstract;153
29.2;Keywords;154
29.3;1 Introduction;154
29.4;2 Experimental;154
29.5;3 Results;155
29.6;4 Discussion;156
29.7;5 Conclusion;157
29.8;References;157
30;Characterization of palladium-related defects in silicon;158
30.1;Abstract;158
30.2;Keywords;158
30.3;1 Introduction;158
30.4;2 Experimental details;159
30.5;3 Results and discussions;159
30.6;4 Conclusions;162
30.7;References;162
31;Low temperature nuclear orientation observations of severe neutron activation damage in e60Tb)TbNiAI4
;163
31.1;Abstract;163
31.2;Keywords;163
31.3;1 Introduction;163
31.4;2 Experimental details;164
31.5;3 Results;165
31.6;4 Discussion;166
31.7;References;167
32;Simulation of PAC spectra for spin 5/2 probes diffusing via a simple vacancy mechanism in CU3Au-structured intermetallic compounds
;168
32.1;Abstract;168
32.2;Keywords;168
32.3;References;171
33;Perturbed angular correlation measurement of the electric field gradient at 181Ta in ZrSi04 and HfSi04
;173
33.1;Abstract;173
33.2;Keywords;173
33.3;1 Introduction;173
33.4;2 Experimental procedure;174
33.5;3 Results and discussion;175
33.6;4 Conclusions;177
33.7;References;178
34;XRD, TDPAC and LAPW study of HflOB2 under high pressure
;179
34.1;Abstract;179
34.2;Keywords;179
34.3;1 Introduction;179
34.4;2 Experimental details;180
34.5;3 Results;181
34.6;4 TDPAC data analysis;182
34.7;5 Calculations and discussion;183
34.8;6 Summary;185
34.9;References;185
35;Determination of quadrupole splitting for 57Fein Ml and M2 sites of both olivine and pyroxene in ordinary chondrites using Mossbauer spectroscopy with high velocity resolution
;187
35.1;Abstract;187
35.2;Keywords;187
35.3;1 Introduction;187
35.4;2 Methods;188
35.5;3 Results and discussions;188
35.6;4 Conclusion;192
35.7;References;193
36;Study of hyperfine interactions in carbonaceous chondrite Isheyevo (CH/CB) using Mossbauer spectroscopy with high velocity resolution
;194
36.1;Abstract;194
36.2;Keywords;194
36.3;1 Introduction;194
36.4;2 Methods;195
36.5;3 Results and discussions;195
36.6;4 Conclusion;199
36.7;References;199
37;Study of metal grains extracted from chondrite Tsarev L5 using Mossbauer spectroscopy with high velocity resolution
;201
37.1;Abstract;201
37.2;Keywords;201
37.3;1 Introduction;201
37.4;2 Methods;202
37.5;3 Results and discussions;203
37.6;4 Conclusion;206
37.7;References;206
38;Temperature dependence of the electric field gradient in GaN measured with the PAC-probe 181Hf
;208
38.1;Abstract;208
38.2;Keywords;208
38.3;1 Introduction;209
38.4;2 Experimental details;209
38.5;3 Results and discussion;210
38.6;4 Conclusions;214
38.7;References;214
39;Time-differential perturbed angular correlation study of the electric field gradient in Ti2Rh MoSirtype compound
;215
39.1;Abstract;215
39.2;Keywords;215
39.3;1 Introduction;215
39.4;2 Experimental;216
39.5;3 Results and discussion;217
39.6;References;219
40;Formation of DX-centers in indium doped CdTe;221
40.1;Abstract;221
40.2;Keywords;221
40.3;1 Introduction;221
40.4;2 Experimental details;223
40.5;3 Results and discussion;223
40.6;4 Summary;227
40.7;References;227
41;Solution of 111ln impurities in the Hf(ZrhAI2 minority phases of Hf(Zr)4AI3 samples
;229
41.1;Abstract;229
41.2;Keywords;229
41.3;1 Introduction;229
41.4;2 Experimental;230
41.5;3 Results and conclusion;231
41.6;References;235
42;Characterization of ZnO and ZnO.9SCoO.OsO prepared by sol-gel method using PAC spectroscopy
;236
42.1;Abstract;236
42.2;Keywords;236
42.3;1 Introduction;236
42.4;2 Experimental procedure;237
42.5;3 Results and discussion;237
42.6;References;240
43;Temperature dependence of electric field gradient in TbCo03
;241
43.1;Abstract;241
43.2;Keywords;241
43.3;1 Introduction;241
43.4;2 Experimental procedure;242
43.5;3 Results and discussion;243
43.6;References;245
44;Evolution under thermal annealing of Mn-doped iron disilicides obtained by ball milling
;246
44.1;Abstract;246
44.2;Keywords;246
44.3;1 Introduction;246
44.4;2 Experimental;247
44.5;3 Results and discussion;248
44.6;4 Conclusions;250
44.7;References;250
45;The temperature dependence of the EFG for 172Lue72Yb) in GaN
;251
45.1;Abstract;251
45.2;Keywords;251
45.3;1 Introduction;251
45.4;2 Results;252
45.5;3 Discussion;253
45.6;4 Summary;254
45.7;References;254
46;First PAC experiments in MAX-phases;255
46.1;Abstract;255
46.2;Keywords;255
46.3;1 Introduction;255
46.4;2 Experimental details;257
46.5;3 Results;258
46.5.1;3.1 Indium loss;258
46.5.2;3.2 The MAX-phase ThInC;258
46.5.3;3.3 The MAX-phase ZrzInC;258
46.5.4;3.4 Compressive stress on ThInC;260
46.6;4 Discussion;261
46.7;References;262
47;High temperature perturbed angular correlation studies of Ln2Ni04+c5 Ln=La,Pr,Nd
;263
47.1;Abstract;263
47.2;Keywords;263
47.3;1 Introduction;263
47.4;2 Experiments;264
47.5;3 Results;264
47.6;4 Discussion;265
47.7;5 Conclusions;266
47.8;References;267
48;TDPAC study of Cd-doped SuO;268
48.1;Abstract;268
48.2;Keywords;269
48.3;1 Introduction;269
48.4;2 Sample preparation and measurements;270
48.5;3 Results and discussion;270
48.6;4 Conclusions;273
48.7;References;274
49;Investigation of hyperfine interactions in RM03 (R =La, Nd; M =Cr, Fe) antiferromagnetic perovskite oxides using PAC spectroscopy
;275
49.1;Abstract;275
49.2;Keywords;275
49.3;1 Introduction;275
49.4;2 Experimental procedure;276
49.5;3 Results and discussion;276
49.6;References;279
50;First-principles study of location of Er3+ ion-relationship to understanding of hyperfine interactions in the optoelectronic erbium-silicon system
;280
50.1;Abstract;280
50.2;Keywords;280
50.3;1 Introduction;281
50.4;2 Procedure;281
50.5;3 Results and discussion;282
50.6;4 Conclusion;284
50.7;References;284
51;Stochastic models of hyperfine interactions in nonequilibrium: an examination of the XYZ model with a trapping-detrapping mechanism
;286
51.1;Abstract;286
51.2;Keywords;286
51.3;1 Slow trapping-detrapping results (rt/.q>Q <<1)
;288
51.4;2 Intermediate trapping-detrapping results;288
51.5;3 Rapid trapping-detrapping results (rt/.q>Q <<1)
;289
51.6;References;290
52;Electric field gradient at uN implanted into ZnO;291
52.1;Abstract;291
52.2;Keywords;291
52.3;1 Introduction;291
52.4;2 Experimental;292
52.5;3 Results and discussion;292
52.6;References;295
53;Electronic structure of substitutional nitrogen impurity in Ti02 studied by the ß-NMR method
;296
53.1;Abstract;296
53.2;Keywords;296
53.3;1 Introduction;297
53.4;2 Experimental;297
53.5;3 Results and discussion;298
53.6;References;299
54;Temperature dependence of Knight shifts for 12B in Pt;300
54.1;Abstract;300
54.2;Keywords;300
54.3;1 Introduction;300
54.4;2 Experimental;301
54.5;3 Results and discussion;301
54.6;References;304
55;Temperature dependence of the lattice locations of boron implanted in germanium
;305
55.1;Abstract;305
55.2;Keywords;305
55.3;1 Introduction;305
55.4;2 Experiment;306
55.5;3 Results and discussions;306
55.6;References;308
56;Spin-lattice relaxation of 25AI and 28p in Pt;309
56.1;Abstract;309
56.2;Keywords;310
56.3;1 Introduction;310
56.4;2 Experimental;310
56.5;3 Results and discussion;310
56.6;References;312
57;Diffusion of 111Cd probes in Ga7Pt3 studied via nuclear quadrupole relaxation
;313
57.1;Abstract;313
57.2;Keywords;313
57.3;References;316
58;High-temperature protonic motion and low-temperature lattice deformation in one-dimensional hydrogen-bonded molecular chain in tetramethylpyrazine-chloranilic acid (1:1)
;317
58.1;Abstract;317
58.2;Keywords;317
58.3;1 Introduction;317
58.4;2 Experimental;318
58.4.1;2.1 Sample preparation and identification;318
58.4.2;2.2 35CINQR;318
58.4.3;2.3 'HNMR;318
58.5;3 Results and discussion;319
58.6;4 Conclusion;322
58.7;References;323
59;DrNQR relaxation of the mixed-valence compound (NH4)4SbmSbvDr12
;324
59.1;Abstract;324
59.2;Keywords;324
59.3;1 Introduction;324
59.4;2 Experimental;326
59.5;3 Results and discussion;326
59.6;4 Conclusion;329
59.7;References;330
60;Mössbauer study of 57Fe in CVD diamond following 57Mn implantation
;331
60.1;Abstract;331
60.2;Keywords;332
60.3;1 Introduction;332
60.4;2 Experimental details;332
60.5;3 Results and discussion;333
60.6;4 Conclusions;336
60.7;References;336
61;Theoretical modeling of bifunctional multilayer systems;337
61.1;Abstract;337
61.2;Keywords;337
61.3;1 Introduction;338
61.4;2 Background;338
61.4.1;2.1 General;338
61.4.2;2.2 Model systems;339
61.4.3;2.3 Design goals;340
61.5;3 Theoretical methodology;340
61.6;4 Results;341
61.7;5 Summary;345
61.8;References;345
62;Hyperfine interactions in (CuFe2O4)1-x(SnO2)x (x =0, 1, 5, 10 and 20 wt,%) nanocomposites studied by Mössbauer spectroscopy
;347
62.1;Abstract;347
62.2;Keywords;347
62.3;1 Introduction;347
62.4;2 Materials and methods;348
62.5;3 Results and discussions;349
62.6;4 Conclusion;352
62.7;References;352
63;Study of the evolution of the hyperfine parameters in nanostructured Fe-Mn-Cu system
;353
63.1;Abstract;353
63.2;Keywords;353
63.3;1 Introduction;353
63.4;2 Experimental;354
63.5;3 Results and discussion;354
63.6;4 Conclusions;356
63.7;References;357
64;Mössbauer study of Sn(Fe)02 prepared by mechanosynthesis
;358
64.1;Abstract;358
64.2;Keywords;358
64.3;1 Introduction;358
64.4;2 Experimental;359
64.5;3 Results and discussion;359
64.6;4 Conclusion;362
64.7;References;362
65;Synthesis, thermal treatment and characterization of cobalt ferrite-based nanocomposites
;364
65.1;Abstract;364
65.2;Keywords;364
65.3;1 Introduction;364
65.4;2 Experimental;365
65.5;3 Data analysis;365
65.6;4 Conclusions;369
65.7;References;369
66;Local magnetic fields in the Mo layer of MolFe multilayer
;370
66.1;Abstract;370
66.2;Keywords;370
66.3;1 Introduction;371
66.4;2 Experimental procedures;371
66.5;3 Results and discussion;371
66.6;References;373
67;The role of Fe during hydride formation in the Mg-Fe system: a Mossbauer investigation
;374
67.1;Abstract;374
67.2;Keywords;374
67.3;1 Introduction;374
67.4;2 Experimental;375
67.5;3 Results;375
67.6;4 Discussion;378
67.7;References;378
68;Perturbed angular correlation study of a nanostructured Hf02 film
;379
68.1;Abstract;379
68.2;Keywords;379
68.3;1 Introduction;379
68.4;2 Experimental procedure;380
68.5;3 Results and discussion;381
68.6;4 Conclusions;383
68.7;References;384
69;Dopants incorporation in ZnO mechanical milled powders sensed by positrons
;385
69.1;Abstract;385
69.2;Keywords;385
69.3;1 Introduction;385
69.4;2 Experimental;386
69.5;3 Results and discussion;386
69.6;4 Conclusions;390
69.7;References;391
70;Mössbauer effect phase determination in iron oxide-polyaniline nanocomposites
;392
70.1;Abstract;392
70.2;Keywords;392
70.3;1 Introduction;392
70.4;2 Experimental details;393
70.5;3 Results and discussion;394
70.6;4 Conclusions;397
70.7;References;397
71;Nanostructures in calcia stabilized hafnia thin films observed by PAC as a function of temperature
;398
71.1;Abstract;398
71.2;Keywords;398
71.3;1 Introduction;399
71.4;2 Experimental;399
71.5;3 Results and discussion;399
71.6;4 Conclusions;403
71.7;References;403
72;NMR study of the isotopically engineered Ge single crystals
;405
72.1;Abstract;405
72.2;Keywords;405
72.3;References;409
73;Zero-field splittings ofNQR spectra for bismuth(III) oxy compounds revealed by quadrupole spin echo envelopes
;410
73.1;Abstract;410
73.2;Keywords;410
73.3;1 Introduction;410
73.4;2 Experimental;411
73.5;3 Modeling;411
73.6;4 Results;411
73.7;5 Discussion;412
73.8;6 Conclusions;413
73.9;References;413
74;Nuclear spin echo model based on Floquet-Lyapuoov theory
;414
74.1;Abstract;414
74.2;Keywords;414
74.3;1 Introduction;414
74.4;2 Nuclear spin echo model;415
74.5;3 Application of the FIoquet-Lyapunov theorem;417
74.6;4 Conclusion;420
74.7;References;420
75;35CI NQR and XRD Studies on CS2[Ag(I)xAu(I)1-xCl2l[Au(III)CI4]
;422
75.1;Abstract;422
75.2;Keywords;422
75.3;1 Introduction;422
75.4;2 Experiment;423
75.5;3 Results and discussion;423
75.6;References;425
76;Novel pulsed electron spin resonance system and studies of phosphorus in natural silicon
;427
76.1;Abstract;427
76.2;Keywords;427
76.3;1 Introduction;427
76.4;2 Pulsed ESR system;428
76.5;3 Experimental results and discussion;428
76.6;References;430
77;Stimulated polarization wave process in spin 3/2 chains;431
77.1;Abstract;431
77.2;Keywords;431
77.3;1 Introduction;431
77.4;2 Hamiltonian of the system;432
77.5;3 Effective Hamiltonian;433
77.6;4 Numerical simulation;435
77.7;5 Discussion;436
77.8;References;437
78;Magnetic moment of proton halo nucleus 28p;438
78.1;Abstract;438
78.2;Keywords;439
78.3;1 Introduction;439
78.4;2 Experimental;440
78.5;3 Results and discussion;441
78.6;4 Summary;443
78.7;References;443
79;Production of spin-polarized 17N beam using inverse-kinematics low-energy transfer reactions
;444
79.1;Abstract;444
79.2;Keywords;444
79.3;1 Introduction;444
79.4;2 Experimental procedure;445
79.5;3 Result and discussion;447
79.6;4 Conclusion;448
79.7;References;448
80;g-Factors of magnetic-rotational states in 85Zr
;449
80.1;Abstract;449
80.2;Keywords;449
80.3;1 Introduction;449
80.4;2 Experimental;450
80.5;3 Results and discussion;452
80.6;4 Summary;453
80.7;References;454
81;Hyperfine anomalies of Sc isotopes (A = 44, 44 m, 46 and 47) in iron
;455
81.1;Abstract;455
81.2;Keywords;455
81.3;1 Introduction;455
81.3.1;1.1 Experimental details;456
81.4;2 Results;456
81.4.1;2.1 47Sc;456
81.4.2;2.2 44,44mSc and 46Sc
;457
81.5;3 Discussion;459
81.6;References;460
82;Electric quadrupole moments of neutron-rich nuclei 32Al and 31Al
;461
82.1;Abstract;461
82.2;Keywords;461
82.3;1 Introduction;462
82.4;2 Experiment and result;462
82.5;3 Discussion;464
82.6;References;464
83;Hyperfine interaction of 25AI in a-Al203 and its quadrupole moment
;465
83.1;Abstract;465
83.2;Keywords;466
83.3;1 Introduction;466
83.4;2 Experimental;466
83.5;3 Results and discussion;466
83.6;References;469
84;Magnetic moment of short lived ß-emitter 24mAI
;470
84.1;Abstract;470
84.2;Keywords;470
84.3;1 Introduction;471
84.4;2 Experimental;471
84.5;3 Results and discussion;471
84.6;References;473
85;ß·Ray angular distribution from purely nuclear spin aligned 20F
;474
85.1;Abstract;474
85.2;Keywords;474
85.3;1 Introduction;475
85.4;2 Experiment;475
85.5;3 Result and discussion;477
85.6;References;477
86;Magnetic moment of 48Sc;478
86.1;Abstract;478
86.2;Keywords;478
86.3;1 Introduction;478
86.4;2 Experimental details;479
86.5;3 Results and discussion;480
86.6;References;481
87;Polarization of 23Ne, 24m,25AI and 28p produced through single nucleon pickup and charge-exchange reactions at 100 AMeV
;483
87.1;Abstract;483
87.2;Keywords;483
87.3;1 Introduction;484
87.4;2 Experimental;485
87.5;3 Results and discussion;485
87.6;References;487
88;Using Mössbauer spectroscopy as key technique in the investigation of nanosized magnetic particles for drug delivery
;488
88.1;Abstract;488
88.2;Keywords;488
88.3;1 Introduction;488
88.4;2 The material platformprovided by magnetic fluids;489
88.5;3 Characterization of nanosized magnetic particles in complex systems;491
88.6;4 Conclusion;497
88.7;References;497
89;35CI NQR spectra of group 1 and silver dichloromethanesulfonates
;500
89.1;Abstract;500
89.2;Keywords;500
89.3;1 Introduction;500
89.4;2 Experimental;502
89.5;3 Results and discussion;503
89.6;References;506
90;New image contrast method in magnetic resonance imaging via ultrasound
;507
90.1;Abstract;507
90.2;Keywords;507
90.3;1 Introduction;507
90.4;2 Theory;508
90.5;3 Results;509
90.6;4 Discussion;510
90.7;References;512
91;Quadrupole coupling constants and isomeric Mössbauer shifts for halogen-containing gold, platinum, niobium, tantalum and antimony compounds
;513
91.1;Abstract;513
91.2;Keywords;513
91.3;1 Introduction;514
91.4;2 Computational details;515
91.5;3 Results and discussion;515
91.6;References;521
92;The DFT-DVM theoretical study of the differences of quadrupole splitting and the iron electronic structure for the rough heme models for a- and ß-subunits in deoxyhemoglobin and for deoxymyoglobin
;523
92.1;Abstract;523
92.2;Keywords;523
92.3;1 Introduction;523
92.4;2 Methods;525
92.5;3 Results and discussions;525
92.6;4 Conclusion;528
92.7;References;529
93;A study of human liver ferritin and chicken liver and spleen using Mossbauer spectroscopy with high velocity resolution
;530
93.1;Abstract;530
93.2;Keywords;530
93.3;1 Introduction;530
93.4;2 Methods;531
93.5;3 Results and discussion;532
93.6;4 Conclusion;536
93.7;References;536
94;Ab initio study of the EFG at the N sites in imidazole
;538
94.1;Abstract;538
94.2;Keywords;538
94.3;1 Introduction;538
94.4;2 Theoretical approach;540
94.5;3 Results and discussion;540
94.6;4 Conclusions;542
94.7;References;542
95;Anomalous HID isotope effect on 35CI NQR frequencies in piperidinium p-chlorobenzoate
;544
95.1;Abstract;544
95.2;Keywords;544
95.3;1 Introduction;544
95.4;2 Experimental;545
95.5;3 Results and discussion;547
95.6;4 Conclusions;551
95.7;References;552
96;Measurement of electric field gradient at 117 In on the Cu-site in mavicyanin by perturbed angular correlation of . -rays
;554
96.1;Abstract;554
96.2;Keywords;554
96.3;1 Introduction;554
96.4;2 Experiments;555
96.5;3 Results and discussion;556
96.6;References;557
97;Investigation of the hyperfine properties of deoxy hemoglobin based on its electronic structure obtained by Hartree-Foek-Roethaan procedure
;559
97.1;1 Introduction;560
97.2;2 Procedure;560
97.3;3 Results and discussion;562
97.4;4 Conclusion;563
97.5;References;564
98;Theoretical investigation of nuclear quadrupole interactions in DNA at first-principles level
;565
98.1;1 Introduction;566
98.2;2 Procedure;566
98.3;3 Results and discussion;567
98.4;4 Conclusions;569
98.5;References;570
99;35CI NQR in glassy crystal, 3-chlorothiophene;571
99.1;1 Introduction;571
99.2;2 Experimental;572
99.3;3 Results and discussion;572
99.4;References;575
100;Study of 14N NQR response to SORe pulse sequence;576
100.1;1 Introduction;576
100.2;2 Experimental;577
100.3;3 Results and discussion;577
100.4;4 Conclusion;581
100.5;References;581
101;PAC research in biology;582
101.1;1 Introduction;582
101.2;2 Reported PAC applications to biological systems;583
101.3;3 PAC probes: merits and drawbacks;586
101.4;4 Biological applications using 11lIn and 181Hf;586
101.5;5 Planned PAC experiments;587
101.6;References;588
102;Laser pumping of ions in a cooler buncher;590
102.1;1 Introduction;590
102.2;2 Laser spectroscopy of the zirconium region;591
102.3;References;593
103;Optical-coupling nuclear spin maser under highly stabilized low static field
;594
103.1;1 Introduction;594
103.2;2 Optical-coupling nuclear spin maser;595
103.3;3 Experiment and status of R&D;595
103.4;4 Summary and future;597
103.5;References;597
104;Cross-relaxation in multiple pulse NQR spin-locking;598
104.1;1 Introduction;598
104.2;2 Experiments;599
104.3;3 Theory;600
104.3.1;3.1 Hamiltonian of the system;600
104.3.2;3.2 Effective Hamiltonian;603
104.3.3;3.3 Kinetic equations;604
104.4;4 Results and discussions;605
104.5;References;608
105;Fitting PAC spectra with a hybrid algorithm;609
105.1;1 Introduction;609
105.2;2 The hybrid algorithm;610
105.3;3 An application example of the HA;611
105.4;4 Discussion and conclusions;612
105.5;References;612
106;Actual concepts of digital PAC-spectroscopy
;613
106.1;1 Introduction;614
106.2;2 Concepts of digital signal and data processing in PAC-spectroscopy;614
106.3;3 The Braunschweig digital PAC-Spectrometer;616
106.4;4 Experimental results;618
106.5;5 Conclusions;620
106.6;Open Access;620
106.7;References;620
107;Development of atomic-beam resonance method to measure the nuclear moments of unstable nuclei
;622
107.1;1 Introduction;622
107.2;2 Experiment;623
107.3;3 Prospect;625
107.4;References;625
108;Efficiency-optimized low-cost TDPAC spectrometer using a versatile routing/coincidence unit
;626
108.1;1 Introduction;626
108.2;2 Description of the spectrometer;627
108.3;3 Equipment performance;632
108.4;4 Summary;635
108.5;References;636
109;Hyperfine interactions: the past, the present and the future
;637
109.1;1 The past;637
109.2;2 The present;638
109.3;3 The future;639
110;Keyword Index (2007/2008);640
111;Author Index (2007/2008);644

Leseproben

"Hyperfine interactions of half-metallic diluted antiferromagnetic semiconductors (p. 21-22)

Abstract Half-metallic diluted antiferromagnetic semiconductors (HM-AF-DMSs) are magnetic materials that are half-metallic and yet do not exhibit magnetization. The remarkable features of these materials and the possible experimental verifications for determining whether or not a material is a HM-AF-DMS by the detection of hyperfine interactions are discussed on the basis of the first-principles calculations of the electronic structure. Keywords Diluted magnetic semiconductor- Half-metal- Hyperfine field

1 Introduction

Spin-electronics (or spintronics), which is a technology that employs the spin state of electrons and provides a new degree of freedom for storing information, is among the most challenging strategies in the development of electronic devices. One of the key issues in spintronics is half-metallicity, i.e., the property of metallicity in one spin state (say, spin-up) of electrons but insulating in the opposite spin state (spin-down). Although all the half-metals known thus far are ferromagnetic, half-metallicity is not restricted to ferromagnets.

The realization of half-metallic antiferromagnets (more precisely, half-metallic compensated ferrimagnets), which are half-metallic and yet do not exhibit magnetization, might be possible and these materials are expected to be used as a new type of spintronics materials. Since the past few years, several diluted ferromagnetic semiconductors (DMSs) have been theoretically designed (computational materials design). In these DMSs, local magnetic states are formed at the impurity bands that appear in a semiconductor gap. Similarly, half-metallic antiferromagnetic DMSs (HM-AF-DMSs) can be realized for the impurity bands in the gap.

We have proposed such a new type of half-metallic antiferromagnets and named them half-metallic diluted antiferromagnetic semiconductors [2]. In order to realize such systems, we have to introduce at least two different types of magnetic ions into nonmagnetic hosts . In DMSs that contains two types of magnetic ions among which the electron occupation of one type of ion is more than half-filling and that of the other is less than half-filling, the local magnetic moments of the two ions can be coupled anti-parallel to each other. In most cases, such an anti-parallel coupling is more stable than the parallel coupling and also exhibits half-metallicity.

Since half-metallic antiferromagnets do not exhibit magnetization, and moreover since they are disordered and diluted systems, it could be rather difficult to observe their chracterestics. In this study, we propose methods to verify whether or not a material is a half-metallic antiferromagnetic semiconductors. Magnetic circular dicroism (MCD) can be employed as one of the methods for detecting half-metallic antiferromagnetism. Another possible method for the verification of half-metallic antiferromagnetism is the detection of hyperfine interactions.

In order to employ the latter method, we have performed the first-principles calculations of the electronic structure and hyperfine fields of half-metallic antiferromagnetic semiconductors. Although several examples indicate that HM-AF materials might be stable, the fabrications of materials based on group II-VI compounds appear to be relatively easy. As an example of such semiconductors, we consider (Cdl-2xCrxFex)Te and discuss its hyperfine interactions."