Electronic Structure and Magnetism of 3d-Transition Metal Pnictides

ISBN-13: 9783642034190 / Angielski / Twarda / 2009 / 154 str.

Kazuko Motizuki; Hideaki Ido; Tadaei Itoh

Opis

This book describes in 2 parts experimental data with simple explanations (Part I) and itinerant electron theories (Part II) about magnetism and its related properties of 3d-intermetallic compounds. Unlike 3d-metal alloys and oxides, theoretical as well as experimental studies on 3d-intermetallic compounds such as 3d-pnictides and chalcogenides, on which we focus in this book, seem unfortunately delayed. The objective of this book is to motivate active studies in this ?eld in the future. We discuss in detail magnetic and related properties of the 3d-transition-metal pnictides and chalcogenides, which include the intermetallic compounds expressed as MX and M X, and their mixed compoundsM M X, MX X and M M X, 2 1?x x 1?y 2?x y x where M (M)isa3d element and X (X ) a pnicogen (P, As, Sb, and Bi) or a chalcogen (S, Se, and Te). Most of the MX-type compounds crystallize either in the hexagonalNiAs-type structure or in the orthorhombicMnP-type structure which is regarded as a distorted NiAs-type structure. Crystallographic phase transition b- ween the NiAs- and the MnP-typesoccursin some of MX-typecompoundswhen the temperaturechanges. The M X-type compoundscrystallize in the tetragonalCu Sb- 2 2 typestructure.Asdescribedin detailinthisbook, manyofthecompoundsmentioned aboveexhibitveryinterestingmagneticandcrystallographicphasetransitionscaused by various means such as change of temperature, applications of external magnetic ?eld or pressure, and change of the composition x in the case of mixed compounds

Spis treści

Experimental.- Basic Properties of 3-Pnictides.- Overview of Magnetic Properties of NiAs-Type (MnP-Type) and CuSb-Type Compounds.- Properties of the Compounds with NiAs-Type (MnP-Type) and CuSb-Type Structures.- Itinerant Electron Theory.- Electronic Band Structure and Magnetism of NiAs-Type Compounds.- Itinerant Electron Theory of Magnetism of CuSb-Type Compounds.

Blurb

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.