Kundu Magnetic Perovskites

Synthesis, Structure and Physical Properties
1. Auflage 2016
ISBN: 978-81-322-2761-8
Verlag: Springer India
Format: PDF
Kopierschutz: 1 - PDF Watermark

E-Book, Englisch, 174 Seiten

Reihe: Engineering Materials

Magnetic perovskite with multi functional properties (magneto-resistive, magneto-dielectric, multiferroics, spintronics, etc.) have attracted increasing attention due to their possible applications towards storage materials and intriguing fundamental Physics. Despite the numerous investigations on multi functional materials in the past few years, a very few magnetic perovskites have been known to realize as ferromagnetic-insulators. In perovskites centred transition metal oxides strong interplay between lattice, charge, spin and/or orbital degrees of freedom provide a fantastic playground to tune their physical properties. The main purpose of this book is to introduce the phenomenon and physics of complex magnetism (phase separation, spin glass, frustrations, etc.) in perovskite manganites and cobaltites via an experimental approach. The book is organized into four chapters; Chap. 1 gives a brief introduction of various interesting phenomena in magnetic perovskites. Chapter 2 describes the results of the investigations on electronic phase separation and glassy ferromagnetism of the hole-doped perovskite manganites and cobaltites. Ordered and disordered effects and related aspects in hole-doped perovskite cobaltites are described in Chap. 3. Finally, in Chap. 4 the bismuth based magnetic perovskite is discussed.


Asish K. Kundu (Ph.D., JNCASR, Bangalore) is at present Associate Professor of Physics & Ex-Head of Natural Sciences Discipline at the IIITDM, Jabalpur. He is a Visiting Research Faculty and CNRS research fellow at CRISMAT Laboratory, France. Also, he was a visiting researcher at Angstrom Laboratory, Sweden and a DRDO scientist at Solid State Physics Laboratory, Delhi. He is a recipient of UGC-CSIR Junior Research Fellowship in the year 2001 and also awarded BOYSCAST Fellowship for the year 2011 by DST Government of India.  His research in perovskites includes magnetic materials, magnetoresistance materials and multiferroicity of transition metal oxides. He has published more than 40 papers and two books in these areas.

Autoren/Hrsg.

Kundu, Asish K

Inhaltsverzeichnis

1;Preface;7
2;Contents;8
3;About the Author;10
4;1 Introduction to Magnetic Perovskites;11
4.1;1.1 Importance of Perovskites;11
4.2;1.2 Description of Perovskite Structure;13
4.3;1.3 Syntheses of Few Perovskites;15
4.3.1;1.3.1 Single-Crystalline Perovskite Cobaltites;16
4.3.1.1;1.3.1.1 Floating Zone Melting Technique;16
4.4;1.4 Significant Properties of Perovskites;18
4.4.1;1.4.1 Magnetic and Electronic Properties;20
4.4.1.1;1.4.1.1 Magnetic Properties;20
4.4.1.2;1.4.1.2 Zener Double-Exchange (DE);21
4.4.1.3;1.4.1.3 Superexchange Interaction;23
4.4.1.4;1.4.1.4 Electrical Properties;24
4.4.2;1.4.2 Colossal Magnetoresistance (CMR);25
4.4.3;1.4.3 Effect of Cation Size and Disorder on Properties;28
4.4.4;1.4.4 Electronic Phase Separation in Perovskites;30
4.4.5;1.4.5 Spin Glass Behavior in Perovskites;35
4.4.6;1.4.6 Multiferroicity in Perovskites;38
4.5;References;41
5;2 Electronic Phase Separation and Glassy Behavior in Magnetic Perovskites;46
5.1;2.1 Introduction;46
5.2;2.2 Manganese-Centered Magnetic Perovskites;47
5.2.1;2.2.1 Electronic Phase Separation (EPS) in (La12212xLnx)0.7Ca0.3MnO3 (Ln = Pr, Nd, Gd, and Y);49
5.2.2;2.2.2 Electronic Phase Separation (EPS) in (La12212xLnx)0.7(Ba/Sr)0.3MnO3 (Ln = Pr, Nd, Gd, and Dy);52
5.2.3;2.2.3 Electronic Phase Separation (EPS) in Nd0.5Ca0.52212xSrxMnO3 (X = 0--0.5);58
5.2.4;2.2.4 Electronic Phase Separation (EPS) in Pr12212xCaxMnO3 (X = 0.3--0.4);61
5.2.5;2.2.5 Glassy Ferromagnetism in Ln0.7Ba0.3MnO3 (Ln = La, Nd, and Gd);62
5.3;2.3 Cobalt-Centered Magnetic Perovskites;66
5.3.1;2.3.1 Electronic Phase Separation in La0.72212xLnxCa0.3CoO3 (Ln = Pr, Nd, Gd, and Dy);67
5.3.2;2.3.2 Spin Glass Behavior in Ln0.7Ca0.3CoO3 (Ln = La, Pr, and Nd);72
5.3.3;2.3.3 Spin Glass Behavior in La12212xSrxCoO3;76
5.4;References;79
6;3 Ordered-Disordered Perovskite Cobaltites;82
6.1;3.1 Introduction;82
6.2;3.2 Crystal Structure of Perovskite Cobaltites;84
6.3;3.3 Magnetic and Electron Transport Properties;90
6.3.1;3.3.1 Disordered Perovskite Cobaltites;92
6.3.2;3.3.2 Ordered Perovskite Cobaltites: A Special Case for Comparison with La--Ba--Co Disordered Phase;101
6.4;References;110
7;4 Bismuth-Centered Perovskite Multiferroics;113
7.1;4.1 Introduction;113
7.2;4.2 Bismuth-Centered Magnetic Perovskites;116
7.2.1;4.2.1 Magnetic and Electrical Properties of La0.5Bi0.5MnO3;116
7.3;4.3 Magnetic Perovskites La0.5Bi0.5MnO3 Doped with Cobalt and Nickel;118
7.3.1;4.3.1 Magnetotransport Properties of Single-Phase Bulk La0.5Bi0.5Mn12212xMxO3 (M = Co, Ni);119
7.3.2;4.3.2 Dielectric Properties of La0.5Bi0.5Mn0.67Co0.33O3;123
7.3.2.1;4.3.2.1 Bulk Phase of La0.5Bi0.5Mn0.67Co0.33O3;123
7.3.2.2;4.3.2.2 Thin Films of La0.5Bi0.5Mn0.67Co0.33O3;125
7.4;4.4 Other Bismuth-Centered Magnetic Perovskites;129
7.4.1;4.4.1 Magnetotransport Properties of Bulk La0.6Bi0.4Mn12212x(Co/Fe/Ni)xO3;129
7.4.2;4.4.2 Magnetodielectric Properties of Bulk La0.6Bi0.4Mn0.6Co0.4O3;135
7.4.3;4.4.3 Magnetotransport-Dielectric Properties of Bulk La12212xBixMn12212yFeyO3 Series;138
7.4.3.1;4.4.3.1 Single-Phase Bulk La0.5Bi0.5Mn0.5Fe0.5O3;138
7.4.3.2;4.4.3.2 Single-Phase Bulk La0.5Bi0.5Mn0.7Fe0.3O3, La0.5Bi0.5Mn0.3Fe0.7O3 and La0.3Bi0.7Mn0.3Fe0.7O3;143
7.4.3.3;4.4.3.3 Single-Phase Bulk La0.8Bi0.2Mn12212yFeyO3;150
7.4.4;4.4.4 Magnetotransport Properties of Bulk (La/Sr/Bi)(MnFe/Cr)O3 Perovskites;157
7.5;4.5 Bismuth-Centered Ordered Magnetic Perovskites La22212xBixMn(Co/Ni)O6;157
7.5.1;4.5.1 Magnetic Properties;158
7.5.2;4.5.2 Electrical Properties;161
7.6;References;164
8;Index;168