Electronic Structure And Magnetism Of 3d-transition Metal Pnictides (springer Series In Materials Science)

"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 reports the experimental data together with phenomenological discussions from fundamental and application view points. Part II addresses how some of interesting behaviors mentioned in Part I can be explained on the basis of an 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."--Publisher's website Part I Experimental 1 Basic Properties of 3d-Pnictides p. 3 1.1 Main Compounds of 3d-Pnictide p. 3 1.2 Crystal Growth by Sintering Method p. 3 1.3 Crystal Structure of NiAs-, MnP-, and Cu 2 Sb-Type Structure p. 5 1.3.1 NiAs-Type Structure p. 5 1.3.2 MnP-Type Structure p. 5 1.3.3 Cu 2 Sb-Type Structure p. 8 1.4 Nonstoichiometric Compounds p. 9 References p. 10 2 Overview of Magnetic Properties of NiAs-Type (MnP-Type) and Cu 2 Sb-Type Compounds p. 11 2.1 Compounds That Have Magnetic Ordering Phase p. 11 2.2 Compounds without Magnetic Ordering p. 13 References p. 15 3 Properties of the Compounds with NiAs-Type (MnP-Type) and Cu 2 Sb-Type Structures p. 17 3.1 MnP and Related Compounds p. 17 3.2 MnAs and Related Compounds p. 17 3.2.1 Magnetic Transition of MnAs and the Bean-Rodbell Theory p. 17 3.2.2 Various Type of Phase Transition of MnAs 1-x P x p. 26 3.2.3 Anomalous Behavior of MnAs 1-x Sb x p. 32 3.2.4 Effect of High Pressure on MnAs 1-x Sb x p. 37 3.2.5 Mn 1-x Cr x As, Mn 1-x Ti x As, etc p. 39 3.2.6 Magnetic Refrigeration Using MnAs and the Related Compounds p. 40 3.3 MnSb and MnBi p. 45 3.4 CrAs and Related Compounds p. 46 3.4.1 Anomalous Magnetic Transition of CrAs p. 46 3.4.2 Critical Lattice Constant of CrAs 1-x P x and Cr 1-x M x As (M = Mn, Ni, etc.) p. 48 3.4.3 Phenomenological Theory for the First Order Transition of CrAs p. 52 3.4.4 CrAs 1-x Sb x p. 53 3.5 CrSb p. 55 3.6 CrP p. 56 3.7 Properties of Cu 2 Sb-Type Compounds p. 56 3.7.1 Antiferromagnetic-Ferrimagnetic Transition of Mn 2-x Cr x Sb and Kittel's Model p. 56 3.7.2 Magnetic Transition of Fe a-x Mn x As (a 2) p. 63 3.7.3 Layered Ferromagnets MnAlGe and MnGaGe p. 63 3.7.4 Application of the First Order Transition of Mn 2-x Cr x Sb p. 64 References p. 66 Appendix Magnetic Transition and Free Energy p. 69 Part II Itinerant Electron Theory 4 Electronic Band Structure and Magnetism of NiAs-Type Compounds p. 75 4.1 Band Calculation p. 75 4.2 Band Structures and Optical Properties p. 76 4.2.1 Pnictides: MnAs and MnSb p. 76 4.2.2 FeAs, CoAs, and NiAs p. 83 4.2.3 CrSb, CrAs, and CrP p. 85 4.2.4 Chalcogenides: CrTe, CrSe, and CrS p. 88 4.2.5 Optical Properties p. 91 4.3 Spin Fluctuations and Anomalous Magnetic and Elastic Properties p. 93 4.3.1 Paramagnetic Susceptibility and Anomalous Thermal Effect of MnAs and MnAs 1-x P x p. 93 4.3.2 Spin Fluctuation and Magnetism p. 95 4.3.3 Spin Fluctuation and Elastic Properties p. 100 4.3.4 Paramagnetic Susceptibility of CoAs and FeAs p. 102 4.4 Fermi Surface of NiAs and the de Haas-van Alfen Effect p. 103 4.5 Pressure Effect on Magnetic State of CrTe, CrSe, and CrS p. 107 4.6 Magnetic Ordering and Instability of Paramagnetic State p. 112 4.6.1 Double-Helical Magnetic Ordering of MnP-Type Compounds p. 112 4.6.2 Instability of Paramagnetic State p. 114 4.6.3 Energy of Double-Helical Spin Density Wave State p. 117 4.7 Phase Transition from the NiAs-Type to the MnP-Type Structure p. 119 4.7.1 Electron-Lattice Interaction Coefficient p. 120 4.7.2 Tendency of Structural Transformation from the NiAs-Type to the MnP-Type p. 121 References p. 125 5 Itinerant Electron Theory of Magnetism of Cu 2 Sb-Type Compounds p. 127 5.1 Crystal Structure and Magnetic Properties p. 127 5.2 Band Structures of Cu 2 Sb-Type Compounds and Magnetic and Optical Properties p. 127 5.2.1 Nonmagnetic State of Cr 2 As, Mn 2 As, Fe 2 As, Mn 2 Sb, CrMnAs, and FeMnAs p. 129 5.2.2 Ferrimagnetic Band of Mn 2 Sb p. 132 5.2.3 Ferromagnetic State of MnAlGe and MnGaGe p. 133 5.2.4 Antiferromagnetic Bands of Cr 2 As, Mn 2 As, and Fe 2 As p. 134 5.2.5 Magnetic Ordering of Cu 2 Sb-Type Compounds p. 136 5.2.6 Photoemission and Inverse Photoemission p. 137 References p. 138 Index 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 pro Front Matter....Pages i-ix Front Matter....Pages 1-1 Basic Properties of 3 d -Pnictides....Pages 3-10 Overview of Magnetic Properties of NiAs-Type (MnP-Type) and Cu 2 Sb-Type Compounds....Pages 11-15 Properties of the Compounds with NiAs-Type (MnP-Type) and Cu 2 Sb-Type Structures....Pages 17-71 Front Matter....Pages 74-74 Electronic Band Structure and Magnetism of NiAs-Type Compounds....Pages 75-126 Itinerant Electron Theory of Magnetism of Cu 2 Sb-Type Compounds....Pages 127-138 Back Matter....Pages 139-142 This book on the magnetic properties of 3d-transition metal compounds focuses on 3d-metal pnictides. It couples experimental data with phenomenological discussions and explores how certain behaviors can be explained based on an itinerant electron picture.