Author: Frederick Edson SpadaPublisher:
ISBN:
Category : Hydrogen
Languages : en
Pages : 522
Book Description
Hydrogen Absorption Properties and Magnetic Behavior of Rare Earth
Author: Frederick Edson SpadaPublisher:
ISBN:
Category : Hydrogen
Languages : en
Pages : 522
Book Description
Magnetic Properties of Rare Earth Metals
Author: R. ElliottPublisher: Springer Science & Business Media
ISBN: 1475756917
Category : Technology & Engineering
Languages : en
Pages : 430
Book Description
The rare earths have a unique place among the elements. Although very much alike chemically and in most phy~ical properties they each have very different and striking magnetic properties. The reason, of course, lies in their 4f electrons which determine the magnetic properties but have little effect on other chemical and physical behaviour. Although they are not rare, some indeed are among the more common heavy elements in the earth's crust, the difficulty of separation has meant that their intricate magnetic properties have only recently been unravelled. Now, however, the general pattern of their magnetism is well charted and the underlying theory is well understood. Both are thoroughly summarised in this book. It provides an excellent example of the kind of extensive synthesis which is possible with modem solid state physics. it represents only a high plateau in the ascent to complete understanding. But It will become clear to the reader that while the overall position is satisfactory there are many details still to be elucidated experimentally and much to be done theoretically before all the underlying forces are identified and estimated from a priori calculations. It is hoped that the book will provide a useful stimulus in this direction. It should also be of use to those who are interested in related disciplines, for example the rare earth compounds, or the transition metals. In addition rare earths promise to be important technologically as alloy constituents.
The Rare Earths in Modern Science and Technology
Author: G.J. McCarthyPublisher: Springer Science & Business Media
ISBN: 1461330548
Category : Science
Languages : en
Pages : 649
Book Description
The Fourteenth Rare Earth Research Conference was held June 25- 28, 1979, at North Dakota State University in Fargo. The meeting was hosted by the College of Science and Mathematics and the Depart ment of Physics. Since the first conference was held in 1960, sub sequent meetings have grown in size and prestige to become one of the leading international forums devoted to disseminating new infor mation relative to rare earth science and technology. The meeting in Fargo was one of the largest yet held. The Program Committee scheduled over 160 papers repres~nting colleagues from 18 countries in both oral and poster sessions that - cluded Spectroscopy (Luminescence, Fluorescence, Laser, Mossbauer, ESR); Metallurgy and Materials Preparation; Solution, Solvation and Analytical Chemistry; X-ray and Neutron Diffraction; Transport and Thermal Properties; Hydrides; Magnetism; and Rare Earth Technology. A first and special event which the organizers hope to perpet uate at future meetings was to announce the recipient of the rare earth prize, hereafter called the Frank H. Spedding Award. Governor Arthur A. Link, State of North Dakota, on behalf of the Selection Committee, presented Professor Frank H. Spedding with a special citation. Professor Spedding spoke briefly and introduced the first recipient, Professor W. Edward Wallace from the University of Pitts burgh.
Effects of Hydrogen Absorption on the Magnetic and Structural Characteristics of Selected Rare Earth - Transition Metal Intermetallics
Author: Edwin B. BoltichPublisher:
ISBN:
Category : Hydrogen
Languages : en
Pages : 294
Book Description
Handbook on the Physics and Chemistry of Rare Earths
Author: Karl A. GschneidnerPublisher: North Holland
ISBN: 9780444820143
Category : Science
Languages : en
Pages : 464
Book Description
Volume 20 completes the second decade of volumes in this series and focuses on the physical aspects of metallic compounds. Research efforts on metallic rare earth compounds started in earnest about 50 years ago and received a significant boost with the discovery of the RCo5 permanent magnets about 12 years later. During this time much has been learned about the structure as well as the electrical, magnetic and thermal properties of approximately 2500 binary rare earth metallic compounds. However, if one considers the possible true ternary compounds and possible pseudo-binary ternary alloys formed by mixing two binary compounds, there is still a wealth of knowledge to be obtained from these still-to-be discovered materials. This volume makes a start in this direction. Chapter one deals with the Fermi surfaces of rare earth (Y, La, Ce, Pr, Nd, Sm, Gd and Yb) intermetallic compounds. It begins with an introduction to the relevant theories required to describe the electrons near the Fermi surface and then to the basic experimental techniques to study these surfaces. The main portion of the chapter is devoted to a comparison of the experimental results with the band structure calculations for a large number of compounds. Chapter two examines the world of thin films of rare earth metals, alloys and compounds. The three main topics covered are the pure metals themselves, metallic alloys and compounds, and metalloid compounds. The next chapter is devoted to hydrogen in metals and their binary compounds RH2 and RH3. One of the critical problems is the purity of the starting rare earth metal itself because phase relations can be greatly affected by impurities and attention is therefore paid to the preparation of specimens and the phase diagrams. Structural properties, kinetics and thermodynamic behavior, as well as electronic, magnetic and thermal properties are reviewed as well. Also examined is the profound influence of hydrogen on the magnetic properties by the mediation of RKKY interaction in these materials. The final chapter is an update on the magnetic behaviors of lanthanide intermetallic compounds, an area which has seen many new developments in the last 15 years. The chapter is divided into two main parts. Part one is devoted to 3d magnetism where both the 3d metal and lanthanide element contribute to the magnetic behavior, and the second part is concerned with lanthanide magnetism itself.
Research in progress
Author: Handbook on the Physics and Chemistry of Rare Earths
Author: Karl Albert GschneidnerPublisher: North-Holland
ISBN: 9780444822888
Category : Science
Languages : en
Pages : 824
Book Description
This volume covers various physical aspects of a wide range of rare-earth materials. Magnetic phenomena dominate the contents of the first four chapters which deal with thin films and layered structures, and intermetallic and nonmetallic compounds. The remaining two chapters deal with coherent emission and electronic structure calculations of lanthanide molecules.The first chapter covers the state-of-the-art of the synthesis and properties of thin films of the rare-earth metals and layered superstructures of two rare-earth metals. The following chapter is a review of rare-earth-transition metal nanoscale multilayers and describes the recent advances in our understanding of magnetic structure, interfacial magnetism, and origin of perpendicular magnetic anisotropy of lanthanide-transition-metal nanoscale multilayers. The next chapter deals with one of the important series of rare-earth intermetallic compounds, those which possess the ThNm 12 -type structure. The authors of the following chapter review the specific magnetic and magnetoelastic properties of certain crystals, which are determined by the localized electronic magnetic moments of the lanthanide ions in the crystal lattice and their interactions with each other and surrounding ions. The chapter on coherent emission differs from other reviews on the subject in that it concentrates on the broader issues. Here the emphasis is on superradiance, superfluorescence, amplification of spontaneous emission by other stimulated emision than the laser effect and coherent spontaneous emission. The final chapter describes the progress that has been made in electronic structure calculations of lanthanide-containing molecules, especially in the last 10 years.
Handbook on the Physics and Chemistry of Rare Earths
Author: Vitalij K. PecharskyPublisher: Elsevier
ISBN: 012821113X
Category : Science
Languages : en
Pages : 208
Book Description
Handbook on the Physics and Chemistry of Rare Earths: Including Actinides, Volume 58, the latest release in this continuous series that covers all aspects of rare earth science, including chemistry, life sciences, materials science and physics, presents interesting chapters on Forensic applications of rare earth materials, and Rare earths, the seventeen-position nob. Presents up-to-date overviews and new developments in the field of rare earths, covering both their physics and chemistry Contains individual chapters that are comprehensive and broad, along with critical reviews Provides contributions from highly experienced, invited experts
Research in Progress
Author: United States. Army Research OfficePublisher:
ISBN:
Category : Military research
Languages : en
Pages : 316
Book Description
Vols. for 1977- consist of two parts: Chemistry, biological sciences, engineering sciences, metallurgy and materials science (issued in the spring); and Physics, electronics, mathematics, geosciences (issued in the fall).
Rare-Earth Elements
Author: Henning HöppePublisher: Walter de Gruyter GmbH & Co KG
ISBN: 3110680882
Category : Science
Languages : en
Pages : 463
Book Description
When the author began working on phosphors based on rare-earth elements, he lacked an introductory textbook that explained the fundamental chemistry, basic optical properties, and magnetic characteristics of lanthanide elements. This book provides a concise overview of the rare-earth elements and is divided into two parts. In the first part, the reader receives an overview of solid-state chemistry and fundamental physical properties of these elements. Key topics of the first part include the separation chemistry of lanthanides, their chemical behaviour and physical properties. Then relevant compound classes are illustrated, crystal structures are systematically explained. The second part focuses on the optical and magnetic properties on relevant examples, also discussing many applications. Students and researchers new to the topic of "Rare-Earth Elements" receive a comprehensive introduction to understand basic optical and magnetic properties and incentives for deeper studies.