Hysteretic behavior of the dynamic permeability on a Ni-Fe thin film

Acher, O.; Queste, S.; Ledieu, M.; Barholz, K.-U.; Mattheis, R.

doi:10.1103/physrevb.68.184414

Cited by 37 publications

(14 citation statements)

References 12 publications

(10 reference statements)

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“…From Eq. 5, when ϕ M = ϕ U , F reaches its maximum and thus the extrema of the resonance frequency corresponds to the easy axes [44,45]. These results agree with the MOKE data (Fig.…”

Section: B Magnetic Propertiessupporting

confidence: 89%

Magneto-optical study of anomalous magnetization reversal in the presence of anisotropy dispersion in CoPd thin films

Sedrpooshan

Ahmadvand²,

González

et al. 2018

Phys. Rev. B

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Magnetization reversal is investigated in the presence of anisotropy dispersion in weakly disordered Co x Pd 100−x (x = 23, 36, 43) thin films. A fourfold in-plane magnetic anisotropy is observed for x = 23, whereas an increase of the Co:Pd ratio induces a uniaxial anisotropy in x = 36 and 43 films. Anomalous magnetization reversal appears along the hard axes (referred to as collapse of hard axes) in x = 23 and 36 films, but disappears for x = 43. The results are consistent with the two-grain Stoner-Wohlfarth model. It is argued that the collapse of the hard axes can be controlled by intergranular exchange interaction. Quadratic magneto-optical Kerr effect (QMOKE) is also observed in the films and is found to weaken if the in-plane anisotropy is lowered through the Co:Pd ratio. QMOKE is observed for magnetic field orientations near the hard axes but not exactly along it, in agreement with the two-grain Stoner-Wohlfarth model.

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“…From Eq. 5, when ϕ M = ϕ U , F reaches its maximum and thus the extrema of the resonance frequency corresponds to the easy axes [44,45]. These results agree with the MOKE data (Fig.…”

Section: B Magnetic Propertiessupporting

confidence: 89%

Magneto-optical study of anomalous magnetization reversal in the presence of anisotropy dispersion in CoPd thin films

Sedrpooshan

Ahmadvand²,

González

et al. 2018

Phys. Rev. B

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“…The resonance frequency f r of the uniform precession mode is deduced from the energy density by using the following expression [12],…”

Section: Theoretical Backgroundmentioning

confidence: 99%

Perpendicular Standing Spin Wave and Magnetic Anisotropic Study on Amorphous FeTaC Films

et al. 2016

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Magnetic anisotropy, spin wave (SW) excitation and exchange stiffness constant of amorphous films were studied as a function of thickness using micro-strip ferromagnetic resonance (MS-FMR) technique. The MS-FMR spectra for in-plane applied magnetic field show the presence of uniform precessional mode (n = 0) along with first perpendicular standing spin wave (PSSW) mode (n = 1) especially for d = 50, 100 and 200 nm films. The angular (ϕH ) dependence of resonance field (Hr) and magnetic field dependence of resonance frequencies (fr) in planar configuration for the uniform and PSSW modes were modeled successfully by using dispersion relation which arises from a combination of exchange and dipolar interactions. The relevant parameters such as saturation magnetization (4πMS), uniaxial anisotropic constant (Ku), g-factor, and exchange stiffness constants (Aex) are estimated for different FeTaC film thickness. Aex is found to increase from 1.52(4)×10 −7 to 5.0(5)×10 −6 erg/cm as the thickness of film increases from 50 to 200 nm, possibly due to surface pinning effect or significant inhomogeneity especially at higher thickness films.

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“…The in-plane and outof-plane equilibrium positions of the magnetization under the applied field are determined by the energy minima. The resonance frequency F r of the uniform precession mode evaluated at the equilibrium can be obtained from the energy density as follows: 13,14 F r…”

Section: ͑2͒mentioning

confidence: 99%

Microstrip line ferromagnetic resonance and Brillouin light scattering investigations of magnetic properties ofCo2MnGeHeusler thin films

et al. 2009

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Co 2 MnGe films of different thicknesses ͑34, 55, and 83 nm͒ were grown by rf sputtering at 400°C on single-crystal Al 2 O 3 corundum substrates showing an in-plane c axis. Their dynamic magnetic properties were studied using conventional and microstrip line ͑MS͒ ferromagnetic resonances ͑FMRs͒, as well as Brillouin light scattering ͑BLS͒ techniques. The effective magnetizations and gyromagnetic factors are first deduced from the resonance spectra involving the uniform magnetic mode under in-plane and out-of-plane magnetic applied fields. The angular dependence of the frequency, measured under a weak in-plane magnetic applied field, then allows deriving of the parameters describing the in-plane magnetic anisotropy. In the 34-and 55-nm-thick films, its behavior is described assuming a magnetic energy density showing an orthorhombic symmetry with a twofold axis normal to the film and planar anisotropy axes at Ϯ / 4 of the c axis of the substrate; however, due to the comparative deduced values of the pertinent coefficients, this energy density is predominantly tetragonal. In the thickest film ͑83 nm͒, one of the planar anisotropy axes is parallel to c and approximate tetragonal symmetry is no more observed. Moreover, the orthorhombic symmetry is not completely fulfilled and a small misalignment between the principal directions connected to the uniaxial and the fourfold energy terms appears. Finally, the perpendicular surface standing modes, which are observed in MS-FMR and in BLS spectra, allow evaluation of the exchange stiffness constant. Good agreement between BLS and MS-FMR measurements has been found.

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Hysteretic behavior of the dynamic permeability on a Ni-Fe thin film

Cited by 37 publications

References 12 publications

Magneto-optical study of anomalous magnetization reversal in the presence of anisotropy dispersion in CoPd thin films

Magneto-optical study of anomalous magnetization reversal in the presence of anisotropy dispersion in CoPd thin films

Perpendicular Standing Spin Wave and Magnetic Anisotropic Study on Amorphous FeTaC Films

Microstrip line ferromagnetic resonance and Brillouin light scattering investigations of magnetic properties ofCo2MnGeHeusler thin films

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