Magnetoacoustic Oscillations in Metals

Magnetoacoustic Oscillations in Metals PDF

Author: Edward Warren Fenton

Publisher:

Published: 1965

Total Pages: 0

ISBN-13:

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Oscillations of the ultrasonic attenuation that are periodic in the reciprocal of an applied magnetic field have been observed in copper, magnesium and zinc. In copper, oscillations well known as "geometric oscillations" have been observed at magnetic fields less than five kilogauss. Observations of the geometric oscillations agree in all respects with theory of the effect discussed in the literature. In magnesium and zinc, at magnetic fields between five and twenty kilogauss, quantum oscillations have been observed. The observed amplitude, periodicity, line-shape and temperature dependence of the amplitude of quantum oscillations depend strongly on the relaxation time and mean-free-path of conduction electrons. The theory of these oscillations is reviewed. For quantum oscillations two cases exist: (1) When the relaxation time of the electrons is comparable to or greater than the period of the ultrasonic vibrations, and the mean-free-path of the electrons is several hundred times greater than the ultrasonic wavelength, and (2) When the relaxation time of the electrons is much less than the period of the ultrasonic vibrations and the mean- free-path of the electrons is comparable to or somewhat greater than the wavelength of the ultrasound. In addition intermediate regimes occur. Theory of the first case has been developed to a considerable extent in the literature,, however no extensive treatments of the second case have been made. Quantum oscillations observed in magnesium and zinc correspond to the second case. Discrepancies and agreement between experimental observations and the limited amount of theory which exists are discussed. In addition shortcomings and flaws of the existing theory are noted.

Magnetic Oscillations in Metals

Magnetic Oscillations in Metals PDF

Author: D. Shoenberg

Publisher: Cambridge University Press

Published: 2009-09-03

Total Pages: 596

ISBN-13: 1316583171

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It is just over 80 years ago that a striking oscillatory field dependence was discovered in the magnetic behaviour of bismuth at low temperatures. This book was first published in 1984 and gives a systematic account of the nature of the oscillations, of the experimental techniques for their study and of their connection with the electronic structure of the metal concerned. Although the main emphasis is on the oscillations themselves and their many peculiarities, rather than on the theory of the electronic structure they reveal, sufficient examples are given in detail to illustrate the kind of information that has been obtained and how this information agrees with theoretical prediction.

Local Geometry of the Fermi Surface

Local Geometry of the Fermi Surface PDF

Author: Natalya A. Zimbovskaya

Publisher: Springer Science & Business Media

Published: 2012-12-06

Total Pages: 258

ISBN-13: 1461301939

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A treatment of the Fermi-liquid theory of high-frequency phenomena in metals, in paricular the effects due to local features in the geometry of the Fermi surface. The text develops a consistent theory of several effects, such as cyclotron resonances in magnetic fields normal to the surface. Topics covered include: basic equations of the Fermi-liquid theory; cyclotron Doppler on waves; local anomalies in the Fermi surface; cyclotron resonancce in metals; magneto-acoustic oscillations and the local geometry of the Fermi surface.

Physical Acoustics V4B

Physical Acoustics V4B PDF

Author: Warren P. Mason

Publisher: Elsevier

Published: 2012-12-02

Total Pages: 513

ISBN-13: 0323147496

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Physical Acoustics: Principles and Methods, Volume IV, Part B: Applications to Quantum and Solid State Physics provides an introduction to the various applications of quantum mechanics to acoustics by describing several processes for which such considerations are essential. This book discusses the transmission of sound waves in molten metals. Comprised of seven chapters, this volume starts with an overview of the interactions that can happen between electrons and acoustic waves when magnetic fields are present. This text then describes acoustic and plasma waves in ionized gases wherein oscillations are subject to hydrodynamic as well as electromagnetic forces. Other chapters examine the resonances and relaxations that can take place in polymer systems. This book discusses as well the general theory of the interaction of a weak sinusoidal field with matter. The final chapter describes the sound velocities in the rocks composing the Earth. This book is a valuable resource for physicists and engineers.

Magnetoacoustic Polarization Phenomena in Solids

Magnetoacoustic Polarization Phenomena in Solids PDF

Author: V.V. Gudkov

Publisher: Springer Science & Business Media

Published: 2012-12-06

Total Pages: 231

ISBN-13: 1461211689

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This book had its conception when Dr. Gudkov visited me in Austin in the Fall of 1995 and urged me to join him in writing a review of the field of magnetoacoustic polarization phenomena. I protested that, although my students and I had done some early work on this topic, most of the later work was done by researchers at the Institute for Metal Physics and by other investigators in the former Soviet Union. He eventually persuaded me that my initial contribution and general experience with magnetoacoustic phenomena qualified me to serve as a co-author. When I considered the fact that the extensive exploration of magnetoacoustic phenomena in the former Soviet Union was relatively unknown to Western scientists, I agreed to work with him on this project. In order to make the material more accessible to nonspecialists, we have adopted consistent notation throughout the text and redrawn the figures from published papers in a consistent fashion. Because our two institutions lie on opposite sides of the world, we needed some financial support to bring the book to fruition. We are very grateful to the Science Program for International Collaboration of the North Atlantic Treaty Organization for financial support through Grant No. HTECH. CRG 951549. I have dedicated this book to my wife, Janie, in recognition of the support she has given me throughout my professional career. J. D.

Ultrasonic Methods in Solid State Physics

Ultrasonic Methods in Solid State Physics PDF

Author: Rohn Truell

Publisher: Academic Press

Published: 2013-10-22

Total Pages: 479

ISBN-13: 148327599X

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Ultrasonic Methods in Solid State Physics is devoted to studies of energy loss and velocity of ultrasonic waves which have a bearing on present-day problems in solid-state physics. The discussion is particularly concerned with the type of investigation that can be carried out in the megacycle range of frequencies from a few megacycles to kilomegacycles; it deals almost entirely with short-duration pulse methods rather than with standing-wave methods. The book opens with a chapter on a classical treatment of wave propagation in solids. This is followed by separate chapters on methods and techniques of ultrasonic pulse echo measurements, and the physics of ultrasonically measurable properties of solids. It is hoped that this book will provide the reader with the special background necessary to read critically the many research papers and special articles concerned with the use of ultrasonic methods in solid state physics. The book is intended to help the person beginning work in this field. At the same time, it will also be useful to those actively involved in such work. An attempt has been made to provide a fairly general and unified treatment suitable for graduate students and others without extensive experience.

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