Study of New Ternary Rare-Earth Intermetallic Germanides with Polar Covalent Bonding

Study of New Ternary Rare-Earth Intermetallic Germanides with Polar Covalent Bonding
Author: Riccardo Freccero
Publisher: Springer Nature
Total Pages: 221
Release: 2020-11-16
Genre: Technology & Engineering
ISBN: 3030589927

The thesis focuses on the syntheses, structural characterizations and chemical bonding analyses for several ternary R–M–Ge (R = rare earth metal; M = another metal) intermetallics. The challenges in understanding the main interactions governing the chemistry of these compounds, which lead to our inability to predict their formation, structure and properties, are what provided the motivation for this study. In particular, the R2MGe6 (M = Li, Mg, Al, Cu, Zn, Pd, Ag), R4MGe10-x (M = Li, Mg), R2Pd3Ge5, Lu5Pd4Ge8, Lu3Pd4Ge4 and Yb2PdGe3 phases were synthesized and structurally characterized. Much effort was put into the stabilization of metastable phases, employing the innovative metal flux method, and into the accurate structure solution of twinned crystals. Cutting-edge position-space chemical bonding techniques were combined with new methodologies conceived to correctly describe the Ge–M, Ge–La and also La–M polar-covalent interactions for the La2MGe6 (M = Li, Mg, Al, Cu, Zn, Pd, Ag) series. The present results constitute a step forward in our comprehension of ternary germanide chemistry as well as providing a good playground for further investigations.

Handbook of Crystal Structures and Magnetic Properties of Rare Earth Intermetallics

Handbook of Crystal Structures and Magnetic Properties of Rare Earth Intermetallics
Author: Andrej Szytula
Publisher: CRC Press
Total Pages: 294
Release: 1994-03-08
Genre: Science
ISBN: 9780849342615

Rare-earth intermetallics, also known as lanthanide elements, play an important role in the study of magnetic materials and the development of semi- and super-conducting materials. This handbook provides an up-to-date compilation of crystallographic, physical, and magnetic data on rare-earth intermetallic compounds. Over 20 different structure types are described in detail with an emphasis on how crystal structure can affect magnetic properties. Theoretical models for magnetic interactions are described as well as the impact of crystal electric fields on transport properties, magneto crystalline anistropy and hyperfine interactions. This book provides materials scientists, engineers and physicists with all the critical information needed to use rare-earth intermetallics effectively in the development of new materials.

Directory of Graduate Research

Directory of Graduate Research
Author: American Chemical Society. Committee on Professional Training
Publisher:
Total Pages: 1932
Release: 2005
Genre: Biochemistry
ISBN:

Faculties, publications and doctoral theses in departments or divisions of chemistry, chemical engineering, biochemistry and pharmaceutical and/or medicinal chemistry at universities in the United States and Canada.

Semiconducting Silicides

Semiconducting Silicides
Author: Victor E. Borisenko
Publisher: Springer Science & Business Media
Total Pages: 362
Release: 2013-03-07
Genre: Technology & Engineering
ISBN: 3642596495

A comprehensive presentation and analysis of properties and methods of formation of semiconducting silicides. Fundamental electronic, optical and transport properties of the silicides collected from recent publications will help readers choose their application in new generations of solid-state devices. A comprehensive presentation of thermodynamic and kinetic data is given in combination with their technical application, as is information on corresponding thin-film or bulk crystal formation techniques.

Chemical Vapor Transport Reactions

Chemical Vapor Transport Reactions
Author: Michael Binnewies
Publisher: Walter de Gruyter
Total Pages: 644
Release: 2012-08-31
Genre: Science
ISBN: 3110254654

This comprehensive handbook covers the diverse aspects of chemical vapor transport reactions from basic research to important practical applications. The book begins with an overview of models for chemical vapor transport reactions and then proceeds to treat the specific chemical transport reactions for the elements, halides, oxides, sulfides, selenides, tellurides, pnictides, among others. Aspects of transport from intermetallic phases, the stability of gas particles, thermodynamic data, modeling software and laboratory techniques are also covered. Selected experiments using chemical vapor transport reactions round out the work, making this book a useful reference for researchers and instructors in solid state and inorganic chemistry.

Solids and Surfaces

Solids and Surfaces
Author: Roald Hoffmann
Publisher: John Wiley & Sons
Total Pages: 155
Release: 2021-01-29
Genre: Science
ISBN: 1119809924

Dieses einzigartige Buch läßt Chemie und Physik im festen Zustand und auf Oberflächen 'zusammentreffen'. In einer lebhaften und anschaulichen Weise bringt es Chemikern die Sprache bei, mit der sie die Elektronenstruktur ausgedehnter Systeme verstehen lernen können. Gleichzeitig zeigt es, wie auch von Seiten der Chemie Modelle über den festen Zustand sowie über Bindungen und Reaktivität von Oberflächen erstellt werden können. Das Buch bedient sich zunächst der Sprache von Kristallorbitalen, Bandstrukturen und Zustandsdichten. Danach stellt es die Werkzeuge bereit, mit denen der Leser weg von den stark delokalisierten Orbitalen des Festkörpers gelangt, darunter der Zerfall von Zustandsdichten und die Population von Kristallorbital-Overlaps. Mit diesen Werkzeugen schafft es der Autor, detaillierte quantenmechanische Berechnungen mit der chemischen Betrachtungsweise mit Grenzorbitalen zu verknüpfen. Die beschriebenen Anwendungen umfassen eine allgemeine Vorstellung der Chemisorption, Bindungsbildung und -zerfall im festen Zustand, Bindungen im Metall, die Elektronenstruktur ausgewählter leitender und supraleitender Verbindungen sowie die für die Deformation ausgedehnter Systeme verantwortlichen Kräfte.

Nanoscale Magnetic Materials and Applications

Nanoscale Magnetic Materials and Applications
Author: J. Ping Liu
Publisher: Springer Science & Business Media
Total Pages: 731
Release: 2010-04-05
Genre: Science
ISBN: 0387856005

Nanoscale Magnetic Materials and Applications covers exciting new developments in the field of advanced magnetic materials. Readers will find valuable reviews of the current experimental and theoretical work on novel magnetic structures, nanocomposite magnets, spintronic materials, domain structure and domain-wall motion, in addition to nanoparticles and patterned magnetic recording media. Cutting-edge applications in the field are described by leading experts from academic and industrial communities. These include new devices based on domain wall motion, magnetic sensors derived from both giant and tunneling magnetoresistance, thin film devices in micro-electromechanical systems, and nanoparticle applications in biomedicine. In addition to providing an introduction to the advances in magnetic materials and applications at the nanoscale, this volume also presents emerging materials and phenomena, such as magnetocaloric and ferromagnetic shape memory materials, which motivate future development in this exciting field. Nanoscale Magnetic Materials and Applications also features a foreword written by Peter Grünberg, recipient of the 2007 Nobel Prize in Physics.