Download or read book Phase resolved Ferromagnetic Resonance Studies of Thin Film Ferromagnetics written by Max Ken Marcham and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Precessional dynamics are exploited in the operation of high frequency magnetic devices such as magnetic disk drives, non reciprocal microwave devices and spin transfer oscillators. The trajectory of the precession and its damping are of crucial importance. This thesis presents the characterisation of a variety of magnetic thin film structures performed with a range of phase sensitive techniques. It is possible to obtain new insight by utilising the chemical and site specificity of X-ray Magnetic Circular Dichroism (XMCD) to isolate the precession in different chemical species or at distinct sites in the crystal structure of a chosen material. X-ray Ferromagnetic Resonance (XFMR) combines XMCD and Ferromagnetic Resonance (FMR) phenomena in a technique capable of measuring the FMR response of an alloy or multilayer with both chemical and site specificity. To complement the XFMR technique a low temperature Time-Resolved Magneto Optical Kerr Effect (TR-MOKE) setup has been developed. This allowed for the characterisation of samples at temperatures in the range 4 K to room temperature. A frequency swept Vector Network Analyser FMR (VNA-FMR) setup was developed to allow for a fast method for determining the resonance condition and damping of a range of ferromagnetic thin film samples. In addition a TR-X-ray Photoemission Electron Microscopy (TR-XPEEM) setup has been established which allows images to be obtained with magnetic contrast. The combination of the above techniques has lead to studies on rare earth capped spin valve free layers and the measurement of spin pumping in industrially relevant spin valves.
Download or read book Ferromagnetic Resonance written by Dr. Orhan Yalçın and published by BoD – Books on Demand. This book was released on 2013-07-31 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book Ferromagnetic Resonance - Theory and Applications highlights recent advances at the interface between the science and technology of nanostructures (bilayer-multilayers, nanowires, spinel type nanoparticles, photonic crystal, etc.). The electromagnetic resonance techniques have become a central field of modern scientific and technical activity. The modern technical applications of ferromagnetic resonance are in spintronics, electronics, space navigation, remote-control equipment, radio engineering, electronic computers, maritime, electrical engineering, instrument-making and geophysical methods of prospecting.
Download or read book Ferromagnetic Resonance Studies and written by Maria Theresia Helena Clasina Wilhelmina Stam and published by . This book was released on 1988 with total page 157 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ferromagnetic Resonance and Microstructure of Soft Magnetic Thin Films written by James Owen Rantschler and published by . This book was released on 2003 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ferromagnetic Resonance written by S. V. Vonsovskii and published by Elsevier. This book was released on 2013-10-22 with total page 341 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ferromagnetic Resonance is a comprehensive account of the basic theory of ferromagnetic resonance, that is, the resonant absorption of a high-frequency magnetic field in ferromagnetic substances. Topics covered include magnetic resonance in ferromagnetics and antiferromagnetics as excitation of spin waves; relaxation processes in ferromagnetic dielectrics; ferromagnetic resonance in metals; and line width of ferromagnetic resonance absorption. Nonlinear processes in ferrites in UHF fields are also discussed. This volume is comprised of nine chapters and begins with an introduction to magnetic resonance in ferromagnetics and the phenomenological theory of ferromagnetic resonance, with emphasis on factors that affect resonance frequency such as shape, crystal magnetic anisotropy, and domain structure. The theory of ferromagnetic resonance in a linear approximation is also considered, along with ferromagnetic resonance in metals and line width of ferromagnetic resonance absorption. The last chapters describe nonlinear processes that occur during ferromagnetic resonance in ferrites. This book will be a useful resource for physicists and physic students.
Download or read book A ferromagnetic resonance study of Co Cr thin films written by Phillip Vernon Mitchell and published by . This book was released on 1987 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ferromagnetic Resonance written by and published by . This book was released on 1966 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ferromagnetic Resonance in Fe and NiFe Thin Films written by Robin Hegenbarth and published by . This book was released on 2007 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1994 with total page 568 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Uniform Mode Ferromagnetic Resonance and Relaxation in Inhomogeneous Thin Films written by Thomas Paul Kehler and published by . This book was released on 1972 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Control of Chaos in Thin Films at Ferromagnetic Resonance written by Derrick W. Peterman and published by . This book was released on 1996 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Low Field Microwave Absorption in Magnetic Thin Films written by Happyson Michael Gavi and published by LAP Lambert Academic Publishing. This book was released on 2012-07 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: The magnetic behavior of cubic B20 crystal structure FeSi thin film has been previously probed at macroscopic level using a magnetometer. The results revealed ferromagnetic state with significant hysteresis. This is contrary to the bulk with the same cubic B20 crystal structure that is paramagnetic. The origin of ferromagnetism in thin films in contrast to paramagnetism in the bulk is unclear and unexplained. Electron spin resonance technique (ESR) was used as a tool to characterize the magnetic behavior of FeSi thin films at microscopic level. With ESR technique, B20 crystalline FeSi show microwave power absorption centred at zero field (HDC = 0) termed low-field microwave absorption (LFA) in addition to usual ferromagnetic resonance (FMR) typical of magnetic materials. LFA was observed as a distinct signal in these films. Magnetic thin films are promising candidates in SPINTRONICS and low-field magnetic sensors. This book is a centre of interest to researchers in SPINTRONICS and electronics who are keen to construct advanced memory devices. This work is also ideal to researchers working with magnetic sensors.
Download or read book Ferromagnetic Resonance of He3 irradiated Thin Metal Films written by Glenn C. Bailey and published by . This book was released on 1965 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Investigation of Magnetic Relaxation Mechanisms and Dynamic Magnetic Properties in Thin Films Using Ferromagnetic Resonance fmr Technique written by Behrouz Khodadadi and published by . This book was released on 2016 with total page 105 pages. Available in PDF, EPUB and Kindle. Book excerpt: Investigating the damping processes and the behavior of dynamic magnetic properties in ferromagnetic thin films has been an important key towards design and fabrication of different microwave and magnetic recording devices. This thesis discusses the dynamic magnetic properties and also the physics behind different relaxation mechanisms in ferromagnetic thin films using comprehensive experimental investigations by means of broadband ferromagnetic resonance (FMR) technique. In chapter one the basics of ferromagnetic resonance technique and the experimental features of the FMR setup used in this study are discussed, also the FMR data analysis is explained. Chapter two is devoted to the study of the interfacial perpendicular magnetic anisotropy (PMA) and damping parameter in Co2FeAl thin films. In chapter three broadband temperature dependent FMR measurements were carried out on Ni80Fe20/Gd thin films to investigate the behavior of ferromagnetic relaxation, and gyromagnetic ratio as the system goes through the Curie temperature of Gd. In chapter four, the ferromagnetic relaxation mechanisms in ferrites are discussed. The low loss Nikel Ferrite and Lithium ferrite single crystal, thin and ultra-thin films were characterized by detailed FMR measurements to investigate the effect of microstructural defects on the magnetization relaxation. A comprehensive study on the interlayer exchange coupling strength in Co90Fe10/Ru/ Co90Fe10 multilayers is the subject of chapter five, in which the mutual spin pumping is discussed as a recently discovered channel for relaxation in exchange coupled multilayers.
Download or read book Magneto optical Detection of Ferromagnetic Resonance in Single crystalline Iron Thin Films written by Marc Möller and published by . This book was released on 2010 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fabrication and Ferromagnetic Resonance Study of Epitaxial Spinel Ferrite Films for Microwave Device Applications written by Neha Pachauri and published by . This book was released on 2014 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt: Single crystalline nickel ferrite and lithium ferrite thin films have attracted a lot of research attention recently, because of their unique physical properties for practical applications in next generation technologies, such as monolithic microwave integrated circuits (MMIC) and multiferroic heterostructures. The properties of these materials are closely related to the specific growth method and can be tailored by factors like surface morphology, microstructure and chemical composition. Different thin film growth techniques have been investigated in the past few decades for the fabrication of single crystalline thin films of both these spinel ferrites. However, the difficulty to attain high quality, homogeneous epitaxial films with limited surface and bulk defects and low microwave loss still remains a challenging task. Moreover, there have been very limited reports on the detailed ferromagnetic resonance (FMR) studies of these single crystalline nickel and lithium ferrite thin films, which is an essential aspect to understand the relaxation in magnetization precession (microwave damping) in these materials. In this dissertation work, fabrication and study of structural, magnetic and FMR properties of single crystalline lithium ferrite (LiFe5O8) and nickel ferrite (NiFe2O4) films by direct liquid injection chemical vapor deposition (DLI-CVD) are studied in detail. The growth conditions, which play a crucial role in attaining the desired film morphology and stoichiometry, are optimized to achieve epitaxial, single crystalline lithium ferrite films having low ferromagnetic resonance linewidth coupled with excellent magnetic properties. A detailed ferromagnetic resonance (FMR) study has been done to identify as well as quantify the magnetic relaxation mechanisms in the `as-grown' nickel ferrite films. The broadband frequency, angle and temperature dependent measurements reveal the existence of two-magnon scattering as the active relaxation mechanism for the films.
Download or read book Ferromagnetic Resonance Study of Square array Antidot Permalloy Thin Films written by Wesley Alan Burgei and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
