Electronic Structure and Magnetism of 3d-transition Metal Pnictides

by Motizuki, Kazuko; Ido, Hideaki; Itoh, Tadaei; Morifuji, Masato

• ISBN13: 9783642034190
• ISBN10: 3642034195
• Format: Hardcover
• Copyright: 2010-02-03
• Publisher: Springer Verlag

Summary

This book presents the results of investigations into the magnetic properties of 3d transition metal compounds. In particular, it deals with 3d metal pnictides (i.e., compounds containing phosphorus, arsenic, antimony or bismuth). Part I shows the experimental data together with phenomenological discussions from fundamental and application view points. Part II shows that some of interesting behaviors mentioned in Part I can be explained on the basis of itinerant electron picture. Band structures obtained by first-principle calculations are applied to introduce theories to calculate various properties such as susceptibility, magnetic ordering, and magnetic transitions etc.

Table of Contents

Experimental
Basic Properties of 3d-Pnictides	p. 3
Main Compounds of 3d-Pnictide	p. 3
Crystal Growth by Sintering Method	p. 3
Crystal Structure of NiAs-, MnP-, and Cu2Sb-Type Structure	p. 5
NiAs-Type Structure	p. 5
MnP-Type Structure	p. 5
Cu2Sb-Type Structure	p. 8
Nonstoichiometric Compounds	p. 9
References	p. 10
Overview of Magnetic Properties of NiAs-Type (MnP-Type) and Cu2Sb-Type Compounds	p. 11
Compounds That Have Magnetic Ordering Phase	p. 11
Compounds without Magnetic Ordering	p. 13
References	p. 15
Properties of the Compounds with NiAs-Type (MnP-Type) and Cu2Sb-Type Structures	p. 17
MnP and Related Compounds	p. 17
MnAs and Related Compounds	p. 17
Magnetic Transition of MnAs and the Bean-Rodbell Theory	p. 17
Various Type of Phase Transition of MnAs1-xPx	p. 26
Anomalous Behavior of MnAs1-xSbx	p. 32
Effect of High Pressure on MnAs1-xSbx	p. 37
Mn1-xCrxAs, Mn1-xTixAs, etc	p. 39
Magnetic Refrigeration Using MnAs and the Related Compounds	p. 40
MnSb and MnBi	p. 45
CrAs and Related Compounds	p. 46
Anomalous Magnetic Transition of CrAs	p. 46
Critical Lattice Constant of CrAs1-xPx and Cr1-xMxAs (M = Mn, Ni, etc.)	p. 48
Phenomenological Theory for the First Order Transition of CrAs	p. 52
CrAs1-xSbx	p. 53
CrSb	p. 55
CrP	p. 56
Properties of Cu2Sb-Type Compounds	p. 56
Antiferromagnetic-Ferrimagnetic Transition of Mn2-xCrxSb and Kittel's Model	p. 56
Magnetic Transition of Fea-xMnxAs (a ≃ 2)	p. 63
Layered Ferromagnets MnAlGe and MnGaGe	p. 63
Application of the First Order Transition of Mn2-xCrxSb	p. 64
References	p. 66
Appendix Magnetic Transition and Free Energy	p. 69
Itinerant Electron Theory
Electronic Band Structure and Magnetism of NiAs-Type Compounds	p. 75
Band Calculation	p. 75
Band Structures and Optical Properties	p. 76
Pnictides: MnAs and MnSb	p. 76
FeAs, CoAs, and NiAs	p. 83
CrSb, CrAs, and CrP	p. 85
Chalcogenides: CrTe, CrSe, and CrS	p. 88
Optical Properties	p. 91
Spin Fluctuations and Anomalous Magnetic and Elastic Properties	p. 93
Paramagnetic Susceptibility and Anomalous Thermal Effect of MnAs and MnAs1-xPx	p. 93
Spin Fluctuation and Magnetism	p. 95
Spin Fluctuation and Elastic Properties	p. 100
Paramagnetic Susceptibility of CoAs and FeAs	p. 102
Fermi Surface of NiAs and the de Haas-van Alfen Effect	p. 103
Pressure Effect on Magnetic State of CrTe, CrSe, and CrS	p. 107
Magnetic Ordering and Instability of Paramagnetic State	p. 112
Double-Helical Magnetic Ordering of MnP-Type Compounds	p. 112
Instability of Paramagnetic State	p. 114
Energy of Double-Helical Spin Density Wave State	p. 117
Phase Transition from the NiAs-Type to the MnP-Type Structure	p. 119
Electron-Lattice Interaction Coefficient	p. 120
Tendency of Structural Transformation from the NiAs-Type to the MnP-Type	p. 121
References	p. 125
Itinerant Electron Theory of Magnetism of Cu2Sb-Type Compounds	p. 127
Crystal Structure and Magnetic Properties	p. 127
Band Structures of Cu2Sb-Type Compounds and Magnetic and Optical Properties	p. 127
Nonmagnetic State of Cr2As, Mn2As, Fe2As, Mn2Sb, CrMnAs, and FeMnAs	p. 129
Ferrimagnetic Band of Mn2Sb	p. 132
Ferromagnetic State of MnAlGe and MnGaGe	p. 133
Antiferromagnetic Bands of Cr2As, Mn2As, and Fe2As	p. 134
Magnetic Ordering of Cu2Sb-Type Compounds	p. 136
Photoemission and Inverse Photoemission	p. 137
References	p. 138
Index	p. 139
Table of Contents provided by Ingram. All Rights Reserved.