Ferromagnetic resonance study of anisotropies of Co/Re multilayers

by Fengling Zhang

Written in English
Published: Pages: 92 Downloads: 805
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Subjects:

  • Ferromagnetic resonance,
  • Anisotropy

Edition Notes

Statementby Fengling Zhang
The Physical Object
Paginationviii, 92 leaves :
Number of Pages92
ID Numbers
Open LibraryOL15226946M

Buy Ferromagnetic Resonance: The Phenomenon of Resonant Absorption of a High-Frequency Magnetic Field in Ferromagnetic Substances on FREE SHIPPING on qualified orders.   Accordingly, the first part of the present research deals with a ferromagnetic resonance, FMR, study of thin films and multilayers containing Fe20Ni80 layered nanocomponents. The second system proposed for ferromagnetic resonance study consists of Co/GdCo multilayers prepared by rf-sputtering. It was chosen as a model system both for. Ferromagnetic resonance is an intrinsic property of magnetic materials. Under microwave irradiation, magnetic moments in magnetic materials will precess around the effective magnetic field direction that is the sum of the applied magnetic field, magnetic anisotropic fields, demagnetizing field, and . Technically Antiferro and Ferromagnetic Resonance utilize the same technique as paramagnetic resonance, but the exchange interaction leads to different physics. The anisotropy tends to be large in these samples, and high fields and frequencies are extremely useful in characterizing these systems, enabling the observation of (anti)ferromagnetic.

Ferromagnetic resonance spectroscopy for assessment of magnetic anisotropy and magnetostatic interactions: a case study of mutant magnetotactic bacteria Robert E. Kopp1*, Cody Z. Nash1, Atsuko Kobayashi2, Benjamin P. Weiss3, Dennis A. Bazylinski4, and Joseph L. Kirschvink1 Received 25 May ; revised 28 September ; accepted 25 October Journal Article: Perpendicular magnetic anisotropy in ultrathin Co|Ni multilayer films studied with ferromagnetic resonance and magnetic x-ray microspectroscopy. Proposal of a micromagnetic standard problem for ferromagnetic resonance simulations. This repository accompanies the paper "Proposal of a standard problem for ferromagnetic resonance simulations" by Alexander Baker, Marijan Beg, Gregory Ashton, Maximilian Albert, Dmitri Chernyshenko, Weiwei Wang, Shilei Zhang, Marc-Antonio Bisotti, Matteo Franchin, Chun Lian Hu, Robert Stamps, . Ferromagnetic resonance (FMR) is a powerful experimental technique for studying ferromagnetic materials. It is used to measure the gyromagnetic ratio, anisotropy field, and damping constant of magnetic materials. This system uses a coplanar waveguide probe and vector network analyzer to measure the microwave absorption in a thin film sample as.

PHYSICAL REVIEW B 83, () Ferromagnetic resonance in microwires and nanowires L. Kraus,1,* G. Infante, 2Z. Frait,1 and M. Vazquez´ 1Institute of Physics, ASCR, CZ, Praha 8, Czech Republic 2Materials Science Institute of Madrid, CSIC, E Madrid, Spain (Received 31 December ; published 24 May ) Ferromagnetic resonance (FMR) in a single thin conducting ferromagnetic. When ferromagnetic materials are used in applications like an iron-core solenoid, the relative permeability gives you an idea of the kind of multiplication of the applied magnetic field that can be achieved by having the ferromagnetic core for an ordinary iron core you might expect a magnification of about compared to the magnetic field produced by the solenoid current with just. Duck-Ho Kim, Hong-Hyun Kim, Chun-Yeol You, and Hyungsuk Kim, "Optimization of Ferromagnetic Resonance Spectra Measuring Procedure for Accurate Gilbert Damping Parameter in Magnetic Thin Films Using a Vector Network Analyzer", J. of Magnet (). Jungbum Yoon, Chun-Yeol You, Younghun Jo, Seung-Young Park, and Myung-Hwa Jung, "Excitation of spin wave on ferromagnetic resonance in ferromagnetic nanowire with a domain wall", ICAUMS, IQ06, Dec.8, Jeju, Korea ().

Ferromagnetic resonance study of anisotropies of Co/Re multilayers by Fengling Zhang Download PDF EPUB FB2

Ferromagnetic resonance (FMR) technique was initially applied to ferromagnetic materials, all magnetic materials and unpaired electron systems. Basically, it is analogous to the electron paramagnetic resonance (EPR).

The EPR technique gives better results at unpaired electron systems. The FMR technique depends on the geometry of the sample at hand. 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 Cited by:   The volume and surface anisotropies of Co/Pd multilayers have been studied by ferromagnetic resonance (FMR) and vibrating sample magnetometer (VSM) measurements for different layer thicknesses and as a function of thermal treatment and before and after ion by: 4.

Ferromagnetic Resonance Studies of Anisotropy in Co/Cu() Multilayers. Soliman. Department of Physics, Faculty of Science, Ain Shams University, Cairo.

Search for more papers by this author. Schreiber. Institut für Experimentalphysik der Ruhr‐Universität Bochum Cited by: 3. Ferromagnetic resonance (FMR) is a useful technique in the measurement of magnetic properties of variety of magnetic media from bulk ferromagnetic materials to nano-scale magnetic thin films.

The precessional motion of a magnetization of a ferromagnetic material in relation to the applied external magnetic field is known as the FMR. History. Ferromagnetic resonance was experimentally discovered by V. Arkad'yev when he observed the absorption of UHF radiation by ferromagnetic materials in A qualitative explanation of FMR along with an explanation of the results from Arkad'yev was offered up by Ya.

Dorfman in when he suggested that the optical transitions due to Zeeman splitting could provide a way to study. Abstract. Ferromagnetic Resonance (FMR) is a powerful method for study the magnetic coupling in multilayers.

In the present work, a trilayer system is assumed to be characterized by the bilinear J 1, biquadratic J 2 coupling, and in-plane uniaxial magneto-crystalline anisotropies with anisotropy axis directions in the two layers making a δ angle.

A detailed discussion of the effect of J 2 and. The resonance frequency of FeNiCo/Teflon films was enhanced to the – GHz range. Ferromagnetic resonance (FMR), including standing spin-wave resonance (SWR) modes, was measured in NiZn ferrite films, which have high permeability even up to the gigahertz range.

Most of the recent works studied several kinds of films with unitary high. J.-M.L. Beaujour et al.: Ferromagnetic resonance study of sputtered Co|Ni multilayers 3 Fig.

(a) Geometry of the FMR measurements. The Net-work Analyzer ports are connected directly to the CPW. (b) Direction of the applied magnetic field H and the magnetiza-tion M. Measurements were conducted with the field in the (x-y) plane, i.e θ = π/2. Ferromagnetic resonance study of Co/Pd/Co/Ni multilayers with perpendicular anisotropy irradiated with helium ions J.-M.

Beaujour,1,a A. Kent,1,b D. Ravelosona,2 I. Tudosa,1 and E. Fullerton3 1Department of Physics, New York University, 4 Washington Place, New YorkUSA 2Institut d’Electronique Fondamentale, UMR CNRSUniversite Paris Sud. Out-of-plane angular dependence of ferromagnetic resonance spectra was measured in sputtered Co/Pt multilayers and analyzed with the Landau-Lifshitz-Gilbert equation.

The effective demagnetizing field 4πM eff is found to increase with decreasing t Pt and decreasing 1/t Co, which can be considered as a result of interplay between the interlayer coupling and a low-dimensional effect. In this study, the influence of Pd and Pt insertion layers in Co/Ni multilayers (MLs) on their magnetic properties, e.g., magnetic anisotropies, saturation magnetization, coercivity, magnetic domain size, and Curie temperature, is investigated.

Purchase Ferromagnetic Resonance - 1st Edition. Print Book & E-Book. ISBNYet for our topographically modified system there appears to be no ferromagnetic resonance study. There has been a FMR study on Co/Pt/FeMn multilayers grown on top of a colloidal crystal [10].

Dynamic magnetic properties of the multilayers I-IV obtained by modelling the broadband ( MHz – 10 GHz) RF spectra with the LLG equations, where H k is the anisotropy field determined from B-H looper measurements, M s is the saturation magnetization determined from VSM measurements, f 0 is the ferromagnetic resonance frequency, Δf is the.

Introduction [2] Ferromagnetic resonance spectroscopy (FMR), a form of electron spin resonance spectroscopy, can serve as a rapid technique for assessing the magnetic anisotropy of and magnetostatic interactions between individual particles in a polycrystalline sample. It is based upon the Zeeman effect, which is the splitting between electron spin energy levels that occurs in the presence.

nological applications. Ferromagnetic resonance (FMR) is a highly sensitive technique which can contribute to this understanding, usually used to probe the presence of in-plane uniaxial and unidir-ectional anisotropies in magnetic films [3–5].Furthermore,the excitation of spin-wave resonance modes in magnetic thin films.

FERROMAGNETIC resonance studies have been made on polycrystalline specimens of the ferromagnetic systems (1 − x)(LiFe5O8)x(CdFe2O4), Li(Fe1−xAlx)5O8, Ni1−xZnxFe2O4 placed in.

The nanoparticles with Rh-rich core were found to have a higher anisotropy field of at 5 K as compared to the nanoparticles with Fe-rich core (). Multifrequency ferromagnetic resonance (4–24 GHz. Two classes of magnetic multilayers are being examined as possible candidates for new magneto-optic storage materials.

The first class of magnetic multilayers are composed of alternating layers of a rare earth and a magnetic 3d transition metal (Fe, Co or Ni). The second class of multilayers are composed of alternating layers. Anisotropic magnetoresistance (AMR) has also been used to study temporal variation of magnetisation in micrometre-scale ferromagnetic thin-films structures, to observe ferromagnetic resonance in the time domain, and to determine magnetic damping [94, ].

In this case, micron-scale magnetic disks were contacted by impedance matched coplanar. Abstract. We develop a model for ferromagnetic resonance in systems with competing uniaxial and cubic anisotropies. This model applies to (i) magnetic materials with both uniaxial and cubic anisotropies, and (ii) magnetic nanoparticles with eï¬ ective core and surface anisotropies; We numerically compute the resonance frequency as a function of the ï¬ eld and the resonance ï¬ eld.

As determined from magnetic force microscopy, magnetometry and ferromagnetic resonance measurements, all multilayers exhibited perpendicular magnetic anisotropy.

Compared with (Co/Pt) multilayers, the sample with t of nm showed almost the same anisotropy field of μ 0 H k = T but the damping constant was 40% lower. Ferromagnetic Resonance: The Phenomenon of Resonant Absorption of a High - Frequency Magnetic Field in Ferromagnetic Substances is a collection of papers on the basic theory of ferromagnetic resonance.

The book discusses the theory of ferromagnetic resonance in detail and the investigations and treatments of problems in this theory.

Study on the in-plane uniaxial anisotropy of high permeability granular films. Appl. Phys. 83, (). Fan X. et al. In situ fabrication of Co 90 Nb 10 soft magnetic thin films with adjustable resonance frequency from to GHz, Appl. Phys. Lett. 92, (). Burkert T. Ferromagnetic resonance, or FMR, is a spectroscopic technique to probe the magnetization of ferromagnetic materials.

It is a standard tool for probing spin waves and spin dynamics. FMR is very broadly similar to electron paramagnetic resonance (EPR), and also somewhat similar to nuclear magnetic resonance (NMR), except that FMR probes the sample magnetization resulting from the.

Resonance in a ferromagnetic sphere, known in the body of literature as the mode of uniform precession, has recently been proven to be magnetic plasmon resonance. Abstract: We present a ferromagnetic resonance (FMR) study of the effect of Helium ion irradiation on the magnetic anisotropy, the linewidth and the Gilbert damping of a Co/Ni multilayer coupled to Co/Pd bilayers.

The perpendicular magnetic anisotropy decreases linearly with He ion fluence, leading to a transition to in-plane magnetization at a critical fluence of 5x10^{14} ions/cm^2.

Brillouin light scattering (BLS) from spin-waves has evolved into a valuable optical probe for the investigation of magnetic thin films and multilayers to accurately determine magnetisations, anisotropies, and exchange parameters.

Ferromagnetic Resonance: The Phenomenon of Resonant Absorption of a High-Frequency Magnetic Field in Ferromagnetic Substances Paperback – Decem by S. Vonsovskii (Editor) See all formats and editions Hide other formats and editions.

Price New from Used from Kindle "Please retry" $ Format: Paperback. to Å Fe thin films have been prepared on W() and studied by ferromagnetic resonance in ultrahigh vacuum. The magnetic anisotropy of Fe films and its temperature dependence were determined independently from the angular and the frequency dependences of the resonance field in the temperature range between and K.

A switching of the easy axis of the magnetization from .The U.S. Department of Energy's Office of Scientific and Technical Information.The isotropic permeability is then achieved. Furthermore, the crossed anisotropies multilay17,18 were also investigated for the purpose of isotropic permeability.

However, the resonance frequencies of those multilayers are normally lower than 2 GHz.