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Rare-earth borides have attracted continuous interest for more than half a century both from the point of view of fundamental condensed matter physics and for practical applications in various fields of engineering. They demonstrate a wealth of unusual electronic and magnetic properties that have been closely investigated in recent decades using advanced spectroscopies and state-of-the-art physical characterization methods. Authored by leading experts in the field, this book features a comprehensive collection of reviews offering a cutting-edge summary of the research on rare-earth borides from various viewpoints. It includes chapters on the growth and characterization of single-crystal and thin-film samples, detailed description of their lattice structure and dynamics, electronic and magnetic properties in the bulk and at the surface, low-temperature ordering phenomena, and theoretical and experimental description of the unusual spectroscopic properties from the perspective of modern x-ray and neutron scattering, Raman spectroscopy, and electron spin resonance. The book will appeal to anyone interested in the physics and chemistry of solids and low-temperature physics, especially to researchers and postgraduate students who study magnetic and electronic properties of rare-earth compounds.
Translated from: Uspekhi khimii (vol. 28, 1959), p. 189-217.
This book presents advances in the field of rare-earth (R) – transition metal (M) – boron compounds with extensive references. Since titanium and scandium do not form compounds with rare-earths, the Sc/Ti-M-B series are additionally presented. In each chapter the crystal structures, the complex physical properties as determined from neutron diffraction, magnetic measurements, resonance studies, transport properties and band structure calculations are critical analyzed. The models used in describing the experimental evidence are also presented. Tables with the main properties of the R-M-B compounds are given and representative data are illustrated in figures. In this way, the book provides state-of-the art knowledge and a valuable analysis of up-to-date results in the field. The technical applications, as permanent magnets, thermoelectric and magnetocaloric devices, hydrogen storage are also highlighted along with the authors insights into future directions in the field. The book is of interest for scientists involved in the development of the field as well as those working in the technical uses of rare-earth compounds.
Refractory Transition Metal Compounds: High Temperature Cermets focuses on the properties, reactions, transformations, and characteristics of refractory compounds. The selection first offers information on continuous-discrete character of variation of the type of bonding in refractory compounds of transition metals, principles of classification of refractory compounds, and calculation of the energy of crystal lattices of inorganic compounds. The text also takes a look at the X-ray spectral investigation of chemical bonding forces in hydrides of refractory metals, using titanium and vanadium compounds as examples and comparison of X-ray K absorption spectra in compounds of chromium with elements of subgroup IV. The manuscript elaborates on the X-ray spectra and interatomic bond in solid metallic compounds and behavior of components of metal solid solutions in a field of electrical forces. The publication also examines the electrical properties of hexaborides of several rare earth metals and the thermionic emission properties of scandium gadolinium borides. The book is a dependable reference for readers wanting to study refractory compounds.
Rareearth hexaborides are a group of materials composed of octahedral boron units. They are useful for making advanced ceramics that have a wide range of industrial applications due to their low electronic work functions, hardness, refractory properties, low electrical resistances and specific thermal expansion coefficients. RareEarth Metal Hexaborides: Synthesis, Properties, and Applications provides a quick reference on rareearth metal hexaborides and their engineering applications. It provides a primer on rare earth elements followed by details of rareearth hexaboride structures, synthetic methods, and information about their alloys and ceramic composites. References to scholarly research are also provided for assisting advanced readers. This reference is a handy source of information for chemical engineering and materials science scholars, and anyone interested in the applied chemistry of rareearth metals and borides.
The volume "Rare Earth Elements" C 11 deals with the compounds and systems of the rare earth elements with boron, Le., borides, borates, and associated alkali double compounds. As in all earlier volumes of "Rare Earth Elements" Se ries C ("Seltenerdelemente" Reihe Cl, comparative data are presented in sections preceding treatment of the individual compounds and systems. Topics of the present volume C 11 aare the comparative data on the borides and the indi vidual sections on the systems and borides containing Sc, Y, and La. The individual sections for the systems and borides with Ce to Lu can be found in the following volume C 11 b together with the borates, their alkali double compounds, and other compounds containing Ce to Lu, boron and elements related by the Gmelin system. The most extensively studied borides treated in the comparative sections are of the type MB. These rare earth hexaborides are refractory compounds and so me of them, especially e LaBe, are good thermionic emissive materials or exhibit other interesting physical properties.