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Download or read book Neutron Scattering Studies of RENi$_{2}B{sub 2}C: Magnetic Structures and Lattice Dynamics written by and published by . This book was released on 1996 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Panagiotis Dervenagas
Publisher :
ISBN 13 :
Total Pages : 230 pages
Book Rating : 4.:/5 (355 download)
Download or read book Neutron Scattering Studies of RENi2B2C written by Panagiotis Dervenagas and published by . This book was released on 1996 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 127 pages
Book Rating : 4.:/5 (683 download)
Download or read book Neutron Scattering Studies of RENi2B2C written by and published by . This book was released on 1996 with total page 127 pages. Available in PDF, EPUB and Kindle. Book excerpt: Neutron scattering techniques have been used to study the magnetic structure and lattice dynamical properties of various members of the recently discovered RENi2B2C family, were RE stands for a rare-earth element. The magnetic structures of superconducting DyNi2B2C, ErNi2B2C, HoNi2B2C, and non superconducting TbNi2B2C have been determined as a function of temperature, in the 2-300 K temperature range.
Author :
Publisher :
ISBN 13 :
Total Pages : 88 pages
Book Rating : 4.:/5 (16 download)
Download or read book Neutron Scattering Studies of the RENi{sub 2}B{sub 2}C (RE written by and published by . This book was released on 1998 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first chapter gives a brief overview of the system discussed in this dissertation. Chapters 2--5 and Appendix B of this dissertation consist of papers that are published, or have been submitted, which show experimental data regarding the phonon softening of LuNi2B2C. These papers have been removed and processed separately. Chapter 6 will contain a summary of the conclusions up to date. Appendix A will consist of a brief derivation of?(q) which is talked about in the introduction of the dissertation. Appendix B will contain a Born-von Karman model fit to the experimental LuNi2B2C data and a comparison with experimental data. Appendix C will contain a brief summary of the work done on LuNi2B2C as well as a complete listing of experimental data taken on the crystals which may be needed later for theoretical models of this system. Appendix D will outline a brief introduction covering some of the field theory used in the theoretical work for this thesis.
Author : Albert Furrer
Publisher : World Scientific
ISBN 13 : 9814548901
Total Pages : 284 pages
Book Rating : 4.8/5 (145 download)
Download or read book Magnetic Neutron Scattering: Proceedings Of The Third Summer School On Neutron Scattering written by Albert Furrer and published by World Scientific. This book was released on 1995-10-12 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt: The proceedings provide a topical survey of the static and dynamical magnetic properties of condensed matter studied by neutron scattering which has been the key technique in this field for a long time. The static aspects deal with the determination of long-range ordered spin structures and magnetization densities. The dynamic aspects concentrate on the determination of magnetic excitations such as spin waves and crystal-field transitions. The use of polarized-neutron techniques is particularly emphasized. All these topics are thoroughly introduced, methodically discussed, and highlighted with recent experimental results obtained for a vast variety of magnetic materials (e.g., strongly correlated electron systems, multilayers, nanocrystals, molecular complexes, etc.) by acknowledged experts. Other experimental methods (x-ray scattering, muon spin rotation) in the study of magnetism are compared to neutron scattering.
Author : Chun-Keung Loong
Publisher :
ISBN 13 :
Total Pages : 446 pages
Book Rating : 4.:/5 (77 download)
Download or read book Neutron Scattering Studies of the Magnetic Properties and Lattice Dynamics of the Mixed Valent CeSn3 written by Chun-Keung Loong and published by . This book was released on 1980 with total page 446 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Albert Furrer
Publisher : World Scientific
ISBN 13 : 9814616273
Total Pages : 393 pages
Book Rating : 4.8/5 (146 download)
Download or read book Complementarity Between Neutron And Synchrotron X-ray Scattering - Proceedings Of The Sixth Summer School Of Neutron Scattering written by Albert Furrer and published by World Scientific. This book was released on 1998-12-30 with total page 393 pages. Available in PDF, EPUB and Kindle. Book excerpt: Understanding and manipulating the properties of materials naturally occurring in our world and artificially produced by modern technologies requires detailed information on their properties on the atomic scale. This information is the basis for any kind of research in physics, chemistry, biology, engineering, metallurgy, and ceramics. Among the various experimental methods, neutron and photon scattering have become the key techniques of choice.This book provides an overview of the complementarity between neutron and synchrotron x-ray scattering. The most important topics are covered, including structure determination, magnetic correlations, polymer dynamics, thin films and multilayers, photoemission studies, etc; they are thoroughly introduced and discussed by experts from both the experimental and the theoretical side.
Author : Tapan Chatterji
Publisher : Elsevier
ISBN 13 : 0080457053
Total Pages : 574 pages
Book Rating : 4.0/5 (84 download)
Download or read book Neutron Scattering from Magnetic Materials written by Tapan Chatterji and published by Elsevier. This book was released on 2005-11-29 with total page 574 pages. Available in PDF, EPUB and Kindle. Book excerpt: Neutron Scattering from Magnetic Materials is a comprehensive account of the present state of the art in the use of the neutron scattering for the study of magnetic materials. The chapters have been written by well-known researchers who are at the forefront of this field and have contributed directly to the development of the techniques described. Neutron scattering probes magnetic phenomena directly. The generalized magnetic susceptibility, which can be expressed as a function of wave vector and energy, contains all the information there is to know about the statics and dynamics of a magnetic system and this quantity is directly related to the neutron scattering cross section. Polarized neutron scattering techniques raise the sophistication of measurements to even greater levels and gives additional information in many cases. The present book is largely devoted to the application of polarized neutron scattering to the study of magnetic materials. It will be of particular interest to graduate students and researchers who plan to investigate magnetic materials using neutron scattering. · Written by a group of scientist who have contributed directly in developing the techniques described.· A complete treatment of the polarized neutron scattering not available in literature.· Gives practical hits to solve magnetic structure and determine exchange interactions in magnetic solids.· Application of neutron scattering to the study of the novel electronic materials.
Author : Thomas Raymond Thurston
Publisher :
ISBN 13 :
Total Pages : 222 pages
Book Rating : 4.:/5 (223 download)
Download or read book Neutron Scattering Studies of the Dynamics and Magnetism and Lattice Dynamics in La2̳-̳x̳Srx̳CuO4̳ written by Thomas Raymond Thurston and published by . This book was released on 1989 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 88 pages
Book Rating : 4.:/5 (893 download)
Download or read book Neutron Scattering Studies of the RENi2B2C (RE written by and published by . This book was released on 1998 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first chapter gives a brief overview of the system discussed in this dissertation. Chapters 2--5 and Appendix B of this dissertation consist of papers that are published, or have been submitted, which show experimental data regarding the phonon softening of LuNi2B2C. These papers have been removed and processed separately. Chapter 6 will contain a summary of the conclusions up to date. Appendix A will consist of a brief derivation of [chi](q) which is talked about in the introduction of the dissertation. Appendix B will contain a Born-von Karman model fit to the experimental LuNi2B2C data and a comparison with experimental data. Appendix C will contain a brief summary of the work done on LuNi2B2C as well as a complete listing of experimental data taken on the crystals which may be needed later for theoretical models of this system. Appendix D will outline a brief introduction covering some of the field theory used in the theoretical work for this thesis.
Author : Steen Aagaard Sorensen
Publisher :
ISBN 13 : 9788755025707
Total Pages : 83 pages
Book Rating : 4.0/5 (257 download)
Download or read book Neutron Scattering Studies of Modulated Magnetic Structures written by Steen Aagaard Sorensen and published by . This book was released on 1999 with total page 83 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Simon Holbein
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (953 download)
Download or read book Neutron Scattering Studies on Complex Magnetic Structures in Magnetoelectric Materials written by Simon Holbein and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Max Bullock
Publisher :
ISBN 13 :
Total Pages : 296 pages
Book Rating : 4.:/5 (391 download)
Download or read book Neutron Scattering Studies of RENi2B2C (RE written by Max Bullock and published by . This book was released on 1997 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt: Inelastic neutron scattering techniques have been used to study the low energy phonon excitations in superconducting RENi2B2C (RE=Lu, Y) to further characterize the anomalous features observed by Kawano et al. (Phys. Rev. Lett., 77, 4628 (1996)) for RE=Y and Stassis et al. (Phys. Rev. B, 55, R8678 (1997)) for RE=Lu, when these systems enter the superconducting ground state. We find that above T[subscript c] the frequencies of the [Delta]4[[Xi]00] lowest-lying acoustic and optic phonon modes decrease with decreasing temperature, for [Xi] close to the nesting vector [Xi subscript m].
Author : Steen Aagaard Sorensen
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (637 download)
Download or read book Neutron scattering studies of modulated magnetic structures written by Steen Aagaard Sorensen and published by . This book was released on 1999 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : San-Wen Chen
Publisher :
ISBN 13 : 9781303717819
Total Pages : 89 pages
Book Rating : 4.7/5 (178 download)
Download or read book X-ray and Neutron Scattering Studies of Magnetic Domain Dynamics and Spin Structures written by San-Wen Chen and published by . This book was released on 2014 with total page 89 pages. Available in PDF, EPUB and Kindle. Book excerpt: The study of magnetic spin structures at nanometer length scales and their dynamics is of both fundamental and technological importance. X-rays and neutrons are penetrating probes that are suitable for studying these in the bulk and the interfaces of the materials. In this thesis, the magnetic domain dynamics are studied by resonant soft x-ray scattering together with x-ray photon correlation spectroscopy. The domain fluctuations reveal when the temperature is close to the phase transition temperature. We find the domain wall dynamics in an antiferromagnet corresponds to a collective motion of spins and exhibit some universal features associated with the jamming behavior in many jammed soft condensed matter systems. We also discuss about the utilization of polarized neutron reflectometry to study the interfacial spin structure in an exchange biased bilayer. The magnetization profiles are obtained which show that some spins are not completely reversible when the magnetic field is reversed. These spins include pinned uncompensated spins in the antiferromagnet and the interfacial spins exchange coupled to those spins. A previously established model was found to reproduce the magnetization profile observed. Finally, we carried out a grazing incidence small angle neutron scattering experiment on an optical grating as a way to test the Distorted Wave Born Approximation (DWBA). DWBA is briefly reviewed and we used it to calculate the scattering intensity of the system.
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Download or read book Neutron Scattering Studies of the RENi[sub 2]B[sub 2]C (RE written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The first chapter gives a brief overview of the system discussed in this dissertation. Chapters 2--5 and Appendix B of this dissertation consist of papers that are published, or have been submitted, which show experimental data regarding the phonon softening of LuNi[sub 2]B[sub 2]C. These papers have been removed and processed separately. Chapter 6 will contain a summary of the conclusions up to date. Appendix A will consist of a brief derivation of[chi](q) which is talked about in the introduction of the dissertation. Appendix B will contain a Born-von Karman model fit to the experimental LuNi[sub 2]B[sub 2]C data and a comparison with experimental data. Appendix C will contain a brief summary of the work done on LuNi[sub 2]B[sub 2]C as well as a complete listing of experimental data taken on the crystals which may be needed later for theoretical models of this system. Appendix D will outline a brief introduction covering some of the field theory used in the theoretical work for this thesis.
Author : Robin Michael Daub Chisnell
Publisher :
ISBN 13 :
Total Pages : 198 pages
Book Rating : 4.:/5 (94 download)
Download or read book Neutron Scattering and Thermodynamic Studies of Quantum Magnetism on the Kagomé Lattice written by Robin Michael Daub Chisnell and published by . This book was released on 2014 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt: The geometry of the kagome lattice leads to exciting novel magnetic behavior in both ferromagnetic and antiferromagnetic systems. The collective spin dynamics were investigated in a variety of magnetic materials featuring spin-1/2 and spin-1 moments on kagome lattices using neutron scattering and thermodynamic probes. Both ferromagnetic and antiferromagnetic systems were studied. Cu(1,3-bdc) is an organometallic material, where the Cu2+ ions form a ferromagnetic S = 1/2. kagomé system. Synthesis techniques were developed to produce -mg-sized deuterated single crystals, and ~2,000 crystals were partially coaligned to create a sample for neutron scattering measurements. Elastic neutron scattering measurements show the existence of long range magnetic ordering below T = 1.77 K. Integrated Bragg peak intensities were analyzed to determine the structure of ordered magnetic moments. Inelastic neutron scattering measurements show the magnon dispersion spectrum, which consists of a flat high energy band and two dispersive, lower energy bands. The application of a magnetic field perpendicular to the kagome plane opens gaps between these three bands and distorts the flatness of the highest energy band. The system was modelled as a nearest-neighbor Heisenberg ferromagnet with Dzyaloshinskii-Moriya(DM) interaction. The model dispersion and scattering structure factor were calculated and fit to the data to precisely determine the strengths of the nearest-neighbor coupling and DM interaction. The observed manon band structure is a bosonic analog to the band structure of the topological insulator systems. Antiferromagnetic kagome systems can exhibit novel magnetic ground states such as quantum spin liquids and spin nematics. Thermodynamic measurements were performed on the antiferromagnetic kagome materials MgxCu4-x(OH)6 Cl2 , featuring S = 1/2 moments. These measurements reveal magnetic ordering at low values of x that is suppressed with increasing x. At x = 0.75, this ordering is not fully suppressed, but susceptibility and specific heat measurements reveal behavior similar to that of the quantum spin liquid candidate herbertsmithite. Thermodynamic and neutron scattering measurements were performed on the kagome lattice material BaNi3(OH)2(VO4)2, which features S = 1 moments. These measurements reveal competing interactions, which result in a spin glass ordering transition.
