Download or read book Magnetoelastic and Magnetostatic Waves in Time Varying Magnetic Fields written by Sergio Machado Rezende and published by . This book was released on 1967 with total page 133 pages. Available in PDF, EPUB and Kindle. Book excerpt: The propagation of microwave magnetoelastic and magnetostatic waves in a ferromagnet subjected to pulsed magnetic fields is investigated both theoretically and experimentally. In the first part of the theoretical analysis, which is restricted to spatially uniform bias fields, the coupling between the magnetic and elastic systems is neglected. Using a coupled mode approach, it is found that plane spin waves propagate in magnetic field transients with negligible reflections, constant momentum and wavenumber, but variable frequency and power flow. These results are further elucidated by the study of a simple step transient case. The analysis is also extended to magnetostatic modes propagating in axially magnetized cylinders. In the presence of magnetoelastic interaction, the theory indicates that besides changes in frequency and in power flow, the field gradient causes group velocity modulation and changes in the time duration of wave packets. In addition there is an exchange of momentum between the different branches of the dispersion relation; this exchange is calculated in terms of critical field gradients. These critical gradients are given for both shear and longitudinal waves propagating along certain crystallographic directions. Experiments with magnetoelastic pulses in axially magnetized YIG rods confirm the theoretical predictions. (Author).
Download or read book Magnetoelastic Wave Propagation in Time Varying Magnetic Fields written by Sergio Machado Rezende and published by . This book was released on 1967 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fundamentals of Magnonics written by Sergio M. Rezende and published by Springer Nature. This book was released on 2020-07-31 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fundamentals of Magnonics is a textbook for beginning graduate students in the areas of magnetism and spintronics. The level of presentation assumes only basic knowledge of the origin of magnetism and electromagnetism, and quantum mechanics. The book utilizes elementary mathematical derivations, aimed mainly at explaining the physical concepts involved in the phenomena studied and enabling a deeper understanding of the experiments presented. Key topics include the basic phenomena of ferromagnetic resonance in bulk materials and thin films, semi-classical theory of spin waves, quantum theory of spin waves and magnons, magnons in antiferromagnets, parametric excitation of magnons, nonlinear and chaotic phenomena, Bose-Einstein condensation of magnons, and magnon spintronics. Featuring end-of-chapter problem sets accompanied by extensive contemporary and historical references, this book provides the essential tools for any graduate or advanced undergraduate-level course of studies on the emerging field of magnonics.
Download or read book Magnetostatic and Magnetoelastic Waves written by Stanford University. Microwave Laboratory and published by . This book was released on 1969 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Electromagnetics of Time Varying Complex Media written by Dikshitulu K. Kalluri and published by CRC Press. This book was released on 2018-09-03 with total page 556 pages. Available in PDF, EPUB and Kindle. Book excerpt: Completely revised and updated to reflect recent advances in the fields of materials science and electromagnetics, Electromagnetics of Time Varying Complex Media, Second Edition provides a comprehensive examination of current topics of interest in the research community—including theory, numerical simulation, application, and experimental work. Written by a world leader in the research of frequency transformation in a time-varying magnetoplasma medium, the new edition of this bestselling reference discusses how to apply a time-varying medium to design a frequency and polarization transformer. This authoritative resource remains the only electromagnetic book to cover time-varying anisotropic media, Frequency and Polarization Transformer based on a switched magnetoplasma medium in a cavity, and FDTD numerical simulation for time-varying complex medium. Providing a primer on the theory of using magnetoplasmas for the coherent generation of tunable radiation, early chapters use a mathematical model with one kind of complexity—eliminating the need for high-level mathematics. Using plasma as the basic medium to illustrate various aspects of the transformation of an electromagnetic wave by a complex medium, the text highlights the major effects of each kind of complexity in the medium properties. This significantly expanded edition includes: Three new parts: (a) Numerical Simulation: FDTD Solution, (b) Application: Frequency and Polarization Transformer, and (c) Experiments A slightly enhanced version of the entire first edition, plus 70% new material Reprints of papers previously published by the author—providing researchers with complete access to the subject The text provides the understanding of research techniques useful in electro-optics, plasma science and engineering, microwave engineering, and solid state devices. This complete resource supplies an accessible treatment of the effect of time-varying parameters in conjunction with one or more additional kinds of complexities in the properties of particular mediums.
Download or read book OAR Cumulative Index of Research Results written by United States. Air Force. Office of Aerospace Research and published by . This book was released on 1963 with total page 550 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Spin acoustic Wave Interaction in Time and spatially varying Magnetic Fields written by Hans Roland Zapp and published by . This book was released on 1968 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: Theoretical and experimental investigations were conducted on the propagation of elastic, magnetoelastic, and spin waves in the presence of time-varying and time- and spatially-varying magnetic fields. The propagating media are axially biased rods of yttrium iron garnet (YIG), Ga substituted (GaYIG), Mn substituted YIG (MnYIG), and non-magnetic yttrium aluminum garnet (YAG), all much larger than the propagation wave length so that a uniform plane wave solution description is possible. The theoretical calculations and experimental results verify that a magnetoelastic wave propagating in a time-varying magnetic field experiences a change in frequency (energy) at constant wavenumber (momentum) while the same wave propagating in a spatially-varying magnetic field experiences a change in wavenumber (momentum) at constant frequency (energy). A time- and spatially-varying field yields changes in both frequency and wavenumber and results in frequency and wavenumber sweeping. The use of both time-varying and spatially-varying magnetic fields provides a number of new signal processing effects. (Author).
Download or read book Magnetization Oscillations and Waves written by Alexander G. Gurevich and published by CRC Press. This book was released on 1996-09-17 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written by two well-known researchers in the field, this useful reference takes an applied approach to high frequency processes including oscillations and waves in ferromagnets, antiferromagnets, and ferrimagnets. Problems evaluated include ferromagnetic and antiferromagnetic resonances, spin waves, nonlinear processes, and high frequency manifestations of interactions between the magnetic system and other systems of magnetically ordered substances as elastic waves and charge carriers. Unlike previous monographs on this subject, which are highly theoretical and written for very advanced readers, this book requires only an average college background in mathematics and experimental physics. It will be a valuable addition to the library of engineers and scientists in research and development for communications applications, and scientists interested in nonlinear magnetic phenomena. It also serves as an excellent introduction to the topic for newcomers in the field. Magnetization Oscillations and Waves not only presents results but also shows readers how to obtain them; most formulas are derived with so many details that readers can reproduce them. The book includes many summaries and tables and detailed references to significant work in the area by European researchers.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1994 with total page 892 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Theory of Magnetostatic Waves written by Daniel D Stancil and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: Magnetic materials can support propagating waves of magnetization; since these are oscillations in the magnetostatic properties of the material, they are called magnetostatic waves (sometimes "magnons" or "magnetic polarons"). Under the proper circumstances these waves can exhibit, for example, either dispersive or nondispersive, isotropic or anisotropic propagation, nonreciprocity, frequency-selective nonlinearities, soliton propagation, and chaotic behavior. This rich variety of behavior has led to a number of proposed applications in microwave and optical signal processing. This textbook begins by discussing the basic physics of magnetism in magnetic insulators and the propagation of electromagnetic waves in anisotropic dispersive media. It then treats magnetostatic modes, describing how the modes are excited, how they propagate, and how they interact with light. There are problems at the end of each chapter; many of these serve to expand or explain the material in the text. To enhance the book's usefulness as a reference, the answers are given for many of the problems. The bibliographies for each chapter give an entry to the research literature. Magnetostatic Waves will thus serve not only as an introduction to an active area of research, but also as a handy reference for workers in the field.
Download or read book Applied Solid State Science written by Raymond Wolfe and published by Academic Press. This book was released on 2013-10-22 with total page 335 pages. Available in PDF, EPUB and Kindle. Book excerpt: Applied Solid State Science: Advances in Materials and Device Research, Volume 2 covers topics about complex oxide materials such as the garnets, which dominate the field of magnetoelasticity and are among the most important laser hosts, and sodalite, which is one of the classic photochromic materials. The book discusses the physics of the interactions of electromagnetic, elastic, and spin waves in single crystal magnetic insulators. The text then describes the mechanism on which inorganic photochromic materials are based, as observed in a variety of materials in single crystal, powder, and glass forms; as well as the chemistry and growth of single crystal materials. Solid state physicists, materials scientists, electrical engineers, and graduate students studying the subjects being discussed will find the book invaluable.
Download or read book Magnetostatic Waves and Their Application written by Pavel Kabos and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 315 pages. Available in PDF, EPUB and Kindle. Book excerpt: Magnetostatic Waves and their Applications is the first book devoted to magnetostatic waves. The book gives a thorough review of the field suitable for scientists, engineers and advanced students involved in magnetism and microwave electronics new to this area. It covers the field from essential physics to applications in microwave electronics, with details of the materials and materials processing methods included.
Download or read book High Frequency Processes in Magnetic Materials written by Gopalan Srinivasan and published by World Scientific. This book was released on 1995 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt: This review volume deals with recent advances in topics of importance to scientists and engineers involved in research and device development utilizing magnetic oxides and multilayers. The subject matter covered includes linear and nonlinear high frequency magnetic excitations and interaction between magnons and photons. In particular, this book contains detailed discussion on the detection of magnons by Brillouin light scattering and photothermal spectroscopy, interaction between spin waves and optical guided modes, microwave solitons, and spin wave instabilities. Recent advances in traditional characterization techniques such as ferromagnetic and antiferromagnetic resonance, and in studies on magnetic order in noncrystalline oxides are also presented.
Download or read book Research in Materials Science and Engineering written by Massachusetts Institute of Technology. Center for Materials Science and Engineering and published by . This book was released on 1967 with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nonlinear Theory of Electroelastic and Magnetoelastic Interactions written by Luis Dorfmann and published by Springer Science & Business Media. This book was released on 2014-02-06 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a unified theory on nonlinear electro-magnetomechanical interactions of soft materials capable of large elastic deformations. The authors include an overview of the basic principles of the classic theory of electromagnetism from the fundamental notions of point charges and magnetic dipoles through to distributions of charge and current in a non-deformable continuum, time-dependent electromagnetic fields and Maxwell’s equations. They summarize relevant theories of continuum mechanics, required to account for the deformability of material and present a constitutive framework for the nonlinear magneto-and electroelastic interactions in a highly deformable material. The equations contained in the book formulate and solve a variety of representative boundary-value problems for both nonlinear magnetoelasticity and electroelasticity.
Download or read book Bibliography of AFCRL Publications from 1 October to 31 December 1967 written by Air Force Cambridge Research Laboratories (U.S.) and published by . This book was released on 1968 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Magnetoelastic Waves written by Gevorg Baghdasaryan and published by Springer. This book was released on 2019-01-04 with total page 251 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book highlights key methods for the mathematical modeling and solution of nonstationary dynamic problems in the theory of magnetoelasticity. It also reveals the richness of physical effects caused by the interaction of electromagnetic and mechanical phenomena in both conducting non-ferromagnetic and dielectric magnetically active deformable bodies. The studies are limited to elastic bodies considering small deformations. The book consists of two parts, the first of which derives the system of equations for describing magnetoelasticity, the surface conditions, and equations describing the perturbations behavior of non-ferromagnetic conducting media interacting with external magnetic fields. These equations are based on the main nonlinear equations and relations of mechanics and quasistatic electrodynamics of continuous media. On this basis, the book puts forward a number of qualitative and quantitative results, solving selected problems of magnetoelastic wave propagation. In turn, the second part considers surface waves in magnetostrictive and piezomagnetic media. It obtains the system of equations, surface conditions and state equations describing the perturbations behavior in magnetoactive ferromagnetic dielectric media interacting with external magnetic fields. Lastly, the book studies the excitations and propagation of new types of surface waves and oscillations in these media, conditioned by the magnetostrictive properties of the respective medium and its interaction with an external magnetic field.
