Ferromagnetic resonance investigations of anisotropy fields of Fe(001) epitaxial layers

Silva, E.C. da; Meckenstock, R.; Geisau, O. von; Kordecki, R.; Pelzl, J.; Wolf, J. A.; Grünberg, P.

doi:10.1016/0304-8853(93)91261-5

Cited by 16 publications

(10 citation statements)

References 6 publications

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“…Besides using FMR to characterize magnetic properties, it also allows one to study the fundamental excitations and technological applications of a magnetic system (Schmool, 1998;Voges, 1998;Zianni, 1998;Grünberg, 2000Grünberg, , 2001Vlasko-Vlasov, 2001;Zhai, 2003;Birkhäuser Verlag, 2007;Seib, 2009). The various thickness, disk array, half-metallic ferromagnetic electrodes, magnon scattering and other of some properties of samples have been studied using the FMR tehniques (Mazur, 1982;da Silva, 1993;Chikazumi, 1997;Song, 2003;Rameev, 2003Rameev, (a), 2003, 2004(a), 2004(b); Ramprasad, 2004;Xu, 2004;Wojtowicz, 2005;Zakeri, 2007;Tsai, 2009;Chen, 2009). The magnetic properties of single-crystalline (Kambe, 2005;Brustolon, 2009), polycrystalline (Singh, 2006;Fan, 2010), alloy films (Sihues, 2007), temperature dependence and similar qualities have been studied electromagnetic spectroscopy techniques (Özdemir, 1998;Fermin, 1999;Rameev, 2000;Aktaş, 2001;Budak, 2003;.…”

Section: Introductionmentioning

confidence: 99%

Ferromagnetic Resonance

Yaln¹

2013

Ferromagnetic Resonance - Theory and Applications

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The following information can be accessed with the help of such resonance experiments. (i) Electrical structure of point defects by looking at the absorption in a thin structure. (ii) The line width with the movement of spin or surroundings isn't changed. (iii) The distribution of the magnetic field in solid by looking at the of the resonance line position (chemical shift and etc.). (iv) Collective spin excitations. Ferromagnetic Resonance-Theory and Applications 2 The atoms of ferromagnetic coupling originate from the spins of d-electrons. The size of μ permanent atomic dipoles create spontaneously magnetized. According to the shape of dipoles materials can be ferromagnetic, antiferromagnetic, diamagnetic, paramagnetic and etc. 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 demagnetization field is observed where the sample geometry is active. The resonance area of the sample depends on the properties of material. The FMR technique is advantageous because it does not cause damage to materials. Also, it allows a three dimensional analysis of samples. The FMR occurs at high field values while EPR occurs at low magnetic field values. Also, line-width of ferromagnetic materials is large according to paramagnetic materials. Exchange interaction energy between unpaired electron spins that contribute to the ferromagnetism causes the line narrowing. So, ferromagnetic resonance lines appear sharper than expected. The FMR studies have been increased since the EPR was discovered in

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Section: Introductionmentioning

confidence: 99%

Ferromagnetic Resonance

Yaln¹

2013

Ferromagnetic Resonance - Theory and Applications

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“…Moreover, for films with thicker Mn layers, at low microwave frequency the uniform resonance mode can only be excited with the static magnetic field applied along or maximally 5 degrees away from the [110] hard axis of magnetization of the Fe layer. This behavior, also seen in Fe/Mn/Fe trilayers [8] and other systems [3], [7], [10], results from the large cubic magnetic anisotropy of the films and does not allow the study of the angular dependence of the in-plane absorption (resonance) fields at low microwave frequency. At a microwave frequency of 33.9 GHz the static magnetic field necessary to attend the resonance condition is about 5 kOe.…”

Section: Fmr Resultsmentioning

confidence: 99%

Magnetic Anisotropy of Epitaxially Grown Fe/Mn/Co Trilayers

et al. 2013

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This paper reports a study of cubic magnetic anisotropies of bcc-Fe and bcc-Co structures in Fe/Mn/Co trilayers grown by molecular beam epitaxy onto MgO(001) substrates. Parallel ferromagnetic resonance experiments, at microwave frequency of 33.9 GHz, reveal the presence of a large fourfold magnetic anisotropy in all studied films. Two uniform resonance modes, with fourfold magnetic anisotropy in both bcc-Fe and Co layers, are excited by the microwave field in samples with Mn thicknesses of 0.83 and 0.99 nm. Films with thick Mn layer (1.16-2.20 nm) do not exhibit independent Fe and Co uniform modes, a result associated with an enhancement of the roughness at the Mn/Co interface (Fe/Mn interface roughness was estimated by Fe Mössbauer spectroscopy to be nearly constant for all films) at the Fe/Mn and Mn/Co interfaces. Magnetic anisotropy constants of bcc-Fe and bcc-Co layers of sample with 0.99 nm thick Mn layer were determined, respectively, as and .

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“…For details of the sample preparation and the sample structure see Ref. [2,4]. PM-FMR spectra at vmod = 800 kHz have been recorded with the laser beam scanning 18 by 18 positions on a grid of 2.8 X 2.88 mm2.…”

Section: Methodsmentioning

confidence: 99%

“…Molecular beam epitaxy offers the opportunity to design magnetic systems with new properties being of interest for both applied and basic research [1,2]. The magnetic behaviour of the films above all depends on the magnetic anisotropy and the exchange interaction which can be investigated very precisely by the conventional ferromagnetic resonance (FMR) technique [3,4]. The FMR measures the precession amplitude of the magnetization M in an effective internal magnetic field BeF This field is composed of the external magnetic field Bo, the demagnetizing field and different anisotropy fields.…”

Section: Introductionmentioning

confidence: 99%

Photothermally modulated ferromagnetic resonance investigations of epitaxially grown thin Fe (001) films

et al. 1994

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The photothermally modulated (PM) ferromagnetic resonance (FMR) combines the high sensitivity of conventional FMR and the spatial resolution of thermal waves. For the first time, this alternative FMR-technique was applied to the magnetic characterization of high-quality thin Fe (001) films epitaxially grown on (001) GaAs substrate : Images of the distribution of crystalline anisotropy constant K1 and the magnetization M were determined from the locally resolved FMR spectra

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Ferromagnetic resonance investigations of anisotropy fields of Fe(001) epitaxial layers

Cited by 16 publications

References 6 publications

Ferromagnetic Resonance

Ferromagnetic Resonance

Magnetic Anisotropy of Epitaxially Grown Fe/Mn/Co Trilayers

Photothermally modulated ferromagnetic resonance investigations of epitaxially grown thin Fe (001) films

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