Ferromagnetic Resonance in Thin Magnetic Films at Radio Frequencies

Hasty, T.E.; Boudreaux, Lee J.

doi:10.1063/1.1728239

Cited by 29 publications

(3 citation statements)

References 11 publications

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“…The ferromagnetic resonance experiment is an important technique for obtaining information about anisotropy, magnetic damping and magnetization reversal [41][42][43]48,[50][51][52] . The influence of spin-polarized current on Gilbert damping and ferromagnetic resonance have been extensively investigated in different situations 30,31,[44][45][46][47]49 .…”

Section: Introductionmentioning

confidence: 99%

“…Finally, we investigate how the ferromagnetic resonance response of a material (or equivalently the dissipation and pumping of energy) is altered due to the above men-tioned spin-orbit torques. The ferromagnetic resonance experiment is an important technique for obtaining information about anisotropy, magnetic damping and magnetization reversal [41][42][43]48,[50][51][52] . The influence of spin-polarized current on Gilbert damping and ferromagnetic resonance have been extensively investigated in different situations 30,31,[44][45][46][47]49 .…”

Section: Introductionmentioning

confidence: 99%

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Asymmetric ferromagnetic resonance, universal Walker breakdown, and counterflow domain wall motion in the presence of multiple spin-orbit torques

Linder

Alidoust

2013

Phys. Rev. B

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We study the motion of several types of domain wall profiles in spin-orbit coupled magnetic nanowires and also the influence of spin-orbit interaction on the ferromagnetic resonance of uniform magnetic films. Whereas domain wall motion in systems without correlations between spin-space and real-space is not sensitive to the precise magnetization texture of the domain wall, spin-orbit interactions break the equivalence between such textures due to the coupling between the momentum and spin of the electrons. In particular, we extend previous studies by fully considering not only the field-like contribution from the spin-orbit torque, but also the recently derived Slonczewski-like spin-orbit torque. We show that the latter interaction affects both the domain wall velocity and the Walker breakdown threshold non-trivially, which suggests that it should be accounted in experimental data analysis. We find that the presence of multiple spin-orbit torques may render the Walker breakdown to be universal in the sense that the threshold is completely independent on the material-dependent Gilbert damping α, non-adiabaticity β, and the chirality σ of the domain wall. We also find that domain wall motion against the current injection is sustained in the presence of multiple spin-orbit torques and that the wall profile will determine the qualitative influence of these different types of torques (e.g. field-like and Slonczewski-like). In addition, we consider a uniform ferromagnetic layer under a current bias, and find that the resonance frequency becomes asymmetric against the current direction in the presence of Slonczewski-like spin-orbit coupling. This is in contrast with those cases where such an interaction is absent, where the frequency is found to be symmetric with respect to the current direction. This finding shows that spin-orbit interactions may offer additional control over pumped and absorbed energy in a ferromagnetic resonance setup by manipulating the injected current direction.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Asymmetric ferromagnetic resonance, universal Walker breakdown, and counterflow domain wall motion in the presence of multiple spin-orbit torques

Linder

Alidoust

2013

Phys. Rev. B

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“…The external field is perpendicular to the uniaxial axis and for any value of H both domains exhibit the same excitation frequency. The long wave length domain mode frequency is given by [7]…”

Section: External Field Applied Perpendicular To the Step Edgementioning

confidence: 99%

Magnetic excitations of interface pinned domains

Dantas

Carriço²

2001

Journal of Magnetism and Magnetic Materials

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We study the uniform excitations of the domains of a thin magnetic film on a two sublattice antiferromagnetic substrate. An interface step defect stabilizes a domain wall which holds two large ferromagnetic domains with opposite magnetization on each side of the defect line. The orientation of the magnetization in the domains, in response to an external field, parallel to the film surface, differs from the single domain situation and leads to new dispersion relations for the uniform precession modes of the ferromagnetic film. We apply the model to the case of a N" eel wall of a uniaxial ferromagnetic film and discuss the implications of the results in measurements of the interface effective exchange field.

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Measurement ofHk andHc in thin ferromagnetic films by theMs vibration method in low frequency field

Sczaniecki

Gontarz

Ratajczak

1971

Phys. Stat. Sol. (a)

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A method is presented of measuring the uniaxial anisotropy field Hk and coercive force Hc by forced vibrations of the magnetization vector Ms in two mutually perpendicular fields lying in the film plane, one of which, of low intensity, varies sinusoidally. The vibration amplitude of Ms exhibits maxima as a function of the dc field from which positions Hk or Hc can be determined according to the case whether the easy axis is directed perpendicular or parallel to the dc field. Theoretical predictions are confirmed experimentally using the planar galvanomagnetic effect for measuring the Ms vector amplitude. The influence of the amplitude of an ac field on the positions of the maxima is discussed.

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Ferromagnetic Resonance in Thin Magnetic Films at Radio Frequencies

Cited by 29 publications

References 11 publications

Asymmetric ferromagnetic resonance, universal Walker breakdown, and counterflow domain wall motion in the presence of multiple spin-orbit torques

Asymmetric ferromagnetic resonance, universal Walker breakdown, and counterflow domain wall motion in the presence of multiple spin-orbit torques

Magnetic excitations of interface pinned domains

Measurement ofHk andHc in thin ferromagnetic films by theMs vibration method in low frequency field

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