Ferromagnetic resonance study of the magnetic anisotropy of a bilayer of Fe on FePtp3s

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Ferromagnetic resonance, Magnetic resonance, Aniso
Statementby Robert L. Compton
The Physical Object
Paginationvii, 100 leaves :
ID Numbers
Open LibraryOL15337399M

The magnetic heterostructures, consisting of Fe nanowire arrays (FNWs) and Fe 25 Ni 75 film, are prepared by combining electrochemical deposition and RF magnetron sputtering. The ferromagnetic resonance (FMR) property in the magnetic heterostructures is investigated by using frequency sweep mode and field sweep : Chenbo Zhao, Lining Pan, Yurui Wei, Hongmei Feng, Qingfang Liu, Jianbo Wang.

Abstract Using magnetometry and ferromagnetic resonance (FMR), we have investigated the magnetic properties of exchange-biased FePt3 ()/Fe () bilayer films epitaxially. We study the ferromagnetic resonance (FMR) on a system consisting of a ferromagnetic (FM) film and an antiferromagnetic film.

The FMR frequency and its linewidth were derived analytically and calculated numerically as a function of applied magnetic field and its angle, exchange anisotropy, strength, and angle of the stress anisotropy for single crystal FM films with, Cited by: 4.

The structural properties and relaxation processes of magnetization in [Ni 81 Fe 19 (t 1)/Ru(t 2)] N superlattices (N=number of bilayers) were analyzed by ferromagnetic resonance (FMR) with a fixed microwave frequency.

One series of samples was deposited with constant NiFe layer thickness (t 1) and variable Ru layer thickness (t 2); the other series, with constant t 2 and variable t by: 3. A FePt lattice parameter ratio c/a ∼ and high chemical order S > result in magnetic anisotropy K U ∼ × 10 7 erg/cm 3, and only 25% below the FePt single crystal value K U = × 10 7 erg/cm 3 has been achieved in 7–8 nm diameter by:   We report ferromagnetic resonance measurements of magnetic anisotropy and damping in epitaxial La Sr MnO 3 (LSMO) and Pt capped LSMO thin films on SrTiO 3 () substrates.

The measurements reveal large negative perpendicular magnetic anisotropy and a weaker uniaxial in-plane anisotropy that are unaffected by the Pt cap. The Gilbert damping of the bare LSMO. A tetragonally distorted FeCo structure is obtained in Fe/Co multilayers epitaxially grown on Au 50 Cu 50 buffer using MgO single crystal substrates as a result of the lattice mismatch between the buffer and the FeCo ferromagnetic layer.

The presence of large magnetic anisotropy energy (MAE) of the order of 1 MJ/m 3 has been confirmed by ferromagnetic resonance.

Exchange-biased NiFe/FeMn/Co trilayers were grown by dc magnetron sputtering and analyzed by in-plane ferromagnetic resonance using Q-band microwaves. The experiments revealed that distinct Co and NiFe resonance modes were excited by the microwave field.

A misalignment between the anisotropy axes of the magnetic layers was deduced from the angular variations of the resonance. Ronald S Indeck, Laleh Avazpour, in Reference Module in Materials Science and Materials Engineering, Ferromagnetic Resonance (FMR) 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. An original approach to tune the ferromagnetic resonance frequency of a soft magnetic Ni80Fe20 (Permalloy = Py) film with in-plane magnetic anisotropy (IMA) based on the controlled coupling to a.

In particular, exchange-coupled hard/soft magnetic bilayers are magnetic stacks combining a hard magnetic layer with high coercive field and a softer one with lower coercivity. They can be used as model systems to study the properties of exchange-spring magnets [ 1 ].

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.).

Description Ferromagnetic resonance study of the magnetic anisotropy of a bilayer of Fe on FePtp3s PDF

However, if the surface anisotropy is present on both surfaces of the ferromagnetic film, the dispersion relation takes the form (14) k-4 K 1 s K 2 s k C 2 tan kL = 2 K 1 s + K 2 s C. As a result, in the limit kL resonance frequency of the quasi-homogeneous mode equals (15) ω = ω H - ω m + γ 2 K 1 s + K 2 s M s L + 4 K 1 s K 2 s M.

The modulated field sweep ferromagnetic resonance (FMR) spectroscopy was used to study the magnetization dynamics in large arrays of interacting cubic nanomagnets. A 60nm thick permalloy (Ni80Fe20) thin films were patterned using a lift-off process into several large arrays of 60 x 60 nm2 nanostructures where the spacing between the magnetic nanocubes was varied to control 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.

Details Ferromagnetic resonance study of the magnetic anisotropy of a bilayer of Fe on FePtp3s EPUB

Fig. 1 shows the FMR data at 10 GHz, where the resonance field is plotted as a function of out-of-plane angle for the three samples measured. The relaxed sample has in-plane and out-of-plane resonance fields consistent with thin film, shape anisotropy arising from Co 2 MnGa bulk magnetization.

There does exist a small amount of strain-induced anisotropy opposing the shape anisotropy in this. We have studied exchange coupled FePt/Fe magnetic layers using the technique of ferromagnetic resonance (FMR).

The FePt layers show strong uniaxial perpendicular anisotropy, growing in. We present a study of fully epitaxial Fe/Pt bilayers by means of ferromagnetic resonance (FMR) techniques. magnetic anisotropy, magnonic STT-MRAM reduces the. Abstract. Ferromagnetic resonance (FMR) is a magnetic resonance comparable to nuclear magnetic resonance (NMR) and electron paramagnetic resonance (EPR); in these techniques the effect of a microwave irradiation is to flip the magnetic moments oriented in a magnetic field.

Magnetic resonance imaging is an important technique for identifying different types of tissues in a body or spatial information about composite materials.

Because temperature is a fundamental. [1] Ferromagnetic resonance spectroscopy (FMR) can be used to measure the effective magnetic field within a sample, including the contributions of both magnetic anisotropy and magnetostatic interactions.

One particular use is in the detection of magnetite produced by magnetotactic bacteria. These bacteria produce single-domain particles with. 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. Ferromagnetic resonance Nuclear magnetic resonance Other resonance methods.

TCD March 2 A resonance experiment involves a specimen placed in a uniform magnetic field B 0 B 0 and applying an AC magnetic 2b 1 Free radicals 2S 1/2 Mn2+ Fe3+ 6S 5/2 Gd3+ 8S 7/2 Ions should be dilute in a crystal lattice to diminish dipole.

Basic principles and simulation. A magnetic moment precesses around a magnetic field B with a frequency equal to g e μ B B/h (Larmor frequency), where h is the Planck's constant, μ B the Bohr magneton and g e the spectroscopic splitting factor of an electron.

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When the Larmor frequency matches the frequency of incident electromagnetic radiation ν, the energy of that radiation is. Ferromagnetic resonance, or FMR, is coupling between an electromagnetic wave and the magnetization of a medium through which it passes. This coupling induces a significant loss of power of the wave.

The power is absorbed by the precessing magnetization (Larmor precession) of the material and lost as this coupling to occur, the frequency of the incident wave must be equal to the. Ferromagnetism is the basic mechanism by which certain materials (such as iron) form permanent magnets, or are attracted to physics, several different types of magnetism are distinguished.

Ferromagnetism (along with the similar effect ferrimagnetism) is the strongest type and is responsible for the common phenomenon of magnetism in magnets encountered in everyday life. 1 Magnetic resonance in nanoparticles: between ferro- and paramagnetism N.

Noginova1, F. Chen1, T. Weaver1, E. Giannelis2, A. Bourlinos2, and V.A. Atsarkin3 1Norfolk State University, Norfolk VA USA 2 Cornell University, Ithaca, NY, USA 3Institute of Radio Engineering & Electronics, MoscowRussia Magnetic nanoparticles of γ-Fe2O3 coated by organic molecules and suspended in.

Ferromagnetic resonance spectroscopy (FMR) can be used to measure the effective magnetic field within a sample, including the contributions of both magnetic anisotropy and magnetostatic interactions.

One particular use is in the detection of magnetite produced by magnetotactic bacteria. These bacteria produce single-domain particles with narrow size and shape distributions that are often. 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 microwave magnetic.

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.

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.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.The thermoelectric conversion technique has been explored in a broad range of heat-flow sensors.

In this context, the Spin Seebeck Effect emerges as an attractive candidate for biosensor applications, not only for the sensibility improvement but also for the power-saving electronic devices development.

Here, we investigate the Longitudinal Spin Seebeck Effect in films with a Co 2 FeAl/W.