Download or read book The Structural and Magnetic Properties of Rare earth Alloys and Superlattices written by Caelia Bryn-Jacobsen and published by . This book was released on 1997 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Magnetic Properties of Rare Earth Metals written by R. Elliott and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Novel Magnetic Behavior in Heavy Rare Earth Superlattices written by Tien Fang Tsui and published by . This book was released on 1992 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Structural and magnetic properties of heavy rare earth films and superlattices synthesized by molecular beam epitaxy are investigated. Epitaxial films of rare earth metals, and superlattices of rare earths with Y interlayers, are grown along different hcp orientations using novel techniques developed specifically for this thesis research. Interesting growth patterns and surface reconstructions are observed, particularly on the a and b faces of the hcp material. Magnetic behavior is explored by neutron diffraction and SQUID magnetometry experiments. The spatial form of the exchange interaction is explored by probing the dependence of magnetic coherence on crystal growth orientation. The results reveal that Dy/Y and Gd/Y superlattices grown along the a and b axis exhibit weak magnetic coupling between successive magnetic layers, even for nonmagnetic spacers as thin as $sim$20 A. Previous studies of the c-axis materials established that long range magnetic order occurs even through Y spacer layers as thick as $sim$120 A. This measured anisotropy between behavior along the c-axis and perpendicular to it, is over a factor ten in both the coupling strength and the range. The strongly anisotropic coupling behavior is shown to have its origin in nearly 2-dimensional nesting features of the rare earth Fermi surfaces. Nesting along the c-axis gives rise to long range exchange interactions along the c-axis, and the lack of nesting perpendicular to the c-axis leaves a rapid exponential decay of the exchange with spin separation. Magnetic phases of epitaxial Dy films are examined as a function of epitaxial strain, growth orientation, temperature and field. The analysis of the observed anisotropic magnetoelastic behavior reveals the detailed energy balance in the Dy system. The observed spin configurations in thin Gd films show that the magnetocrystalline anisotropy of bulk Gd is substantially modified in the films. This in turn gives insight into the origin of the unusual spin reorientation transition in Gd. Magnetic order in buried monolayers of Gd-Y alloys is studied in order to explore the effects of both the reduced physical dimensions and the modified effective exchange interaction on phase transitions. No long range order occurs in the monolayer system even for nearly full Gd monolayer coverage. A spin-glass transition is observed instead. The zero field susceptibility exhibits a divergence at low temperatures. The analysis of the magnetic states reveals unusual scaling behavior and a dimensionality cross-over in the monolayer system.
Download or read book Handbook of Crystal Structures and Magnetic Properties of Rare Earth Intermetallics written by Andrej Szytula and published by CRC Press. This book was released on 2020-07-09 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Magnetic Properties of Rare earth Elements and Superlattices written by John Andrew Simpson and published by . This book was released on 1995 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Magnetic properties of rare earth superlattices written by Caroline Jane Theresa Wilkins and published by . This book was released on 2001 with total page 155 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Magnetic Properties of Metals written by H.P.J. Wijn and published by Springer Science & Business Media. This book was released on 1991-05-31 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contents: 3d elements.- Alloys between 3d elements.- 4d and 5d elements, alloys and compounds.- Alloys and compounds of 3d elements and 4d or 5d elements.- Alloys and compounds of 3d elements with main group elements.- Alloys and compounds of 4d or 5d elements with main group elements.- Heusler alloys.- Metallic perovskites.- Appendix.
Download or read book The Chemical and Magnetic Structures of Rare Earth Alloys and Superlattices written by Paul S. Clegg and published by . This book was released on 2000 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Magnetic Properties of Rare Earth Metals written by R. Elliott and published by . This book was released on 2014-01-15 with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Structure and Magnetic Properties of Rare Earth Iron Alloys Synthesized by Mechanical Alloying and Mechanochemical Reaction written by Clive David Milham and published by . This book was released on 1996 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Magnetic Structures in Rare Earth Metals and Superlattices written by David Antony Jehan and published by . This book was released on 1993 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Structural and magnetic properties of Co Cr 001 superlattices written by Wolfgang Donner and published by . This book was released on 1994 with total page 93 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Magnetic Structure Properties of Some Heavy Rare Earth Alloys written by Harry Ray Child and published by . This book was released on 1965 with total page 103 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Rare Earth Magnetism written by Jens Jensen and published by . This book was released on 1991-06-13 with total page 426 pages. Available in PDF, EPUB and Kindle. Book excerpt: This monograph presents a unified and coherent account of an important, focused area of rare-earth magnetism -- magnetic structures and excitations -- which both reflects the nature of the fundamental magnetic interactions and determines many of the characteristic properties of metals. The authors concentrate on the essential principles and their applications to typical examples, generally restricting the discussion to the pure elements and considering alloys and compounds only when they are instructive in illuminating particular topics. Both authors have been involved for some time in the effort that has been made in Denmark to study, both theoretically and experimentally, the magnetic structures and especially the excitations in the rare earths. This account of the subject represents the result of their experience, and it has been written in the hope that it will be useful not only to those who have a special interest in rare-earth magnetism, but also to a wider audience of physicists and condensed matter scientists interested in the techniques and achievements of modern research in magnetism.
Download or read book Rare Earth Permanent Magnet Alloys High Temperature Phase Transformation written by Shuming Pan and published by Springer. This book was released on 2014-12-01 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt: The process of high temperature phase transition of rare earth permanent-magnet alloys is revealed by photographs taken by high voltage TEM. The relationship between the formation of nanocrystal and magnetic properties is discussed in detail, which effects alloys composition and preparation process. The experiment results verified some presumptions, and were valuable for subsequent scientific research and creating new permanent-magnet alloys. The publication is intended for researchers, engineers and managers in the field of material science, metallurgy, and physics. Prof. Shuming Pan is senior engineer of Beijing General Research Institute of Non-ferrous Metal.
Download or read book Handbook on the Physics and Chemistry of Rare Earths written by Karl Albert Gschneidner and published by North-Holland. This book was released on 1996 with total page 824 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book The Electronic Structure of Rare earth Metals and Alloys written by B. Coqblin and published by . This book was released on 1977 with total page 680 pages. Available in PDF, EPUB and Kindle. Book excerpt:
