Two magnon scattering in ultrathin ferromagnets: The case where the magnetization is out of plane

Landeros, P.; Arias, Rodrigo; Mills, D. L.

doi:10.1103/physrevb.77.214405

Cited by 136 publications

(127 citation statements)

References 24 publications

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“…The two magnon scattering rate Γ depends on the angle θ H (out-ofplane geometry) and on the resonance field H res . A detailed analysis based on the effect of the defects on the response functions of thin films was performed in [22] and [31] for the case when the magnetisation is tipped out-of-plane. We consider here the same type of angular dependence of Γ as in [31] (see (8)).…”

Section: Magnetic Relaxationmentioning

confidence: 99%

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Ferromagnetic resonance and magnetic damping in C-doped Mn₅Ge₃

Dutoit¹,

Dolocan²,

Kuz’min³

et al. 2015

J. Phys. D: Appl. Phys.

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Abstract. Ferromagnetic resonance (FMR) was used to investigate the static and dynamic magnetic properties of carbon-doped Mn 5 Ge 3 (C 0.1 and C 0.2 ) thin films grown on Ge(111). The temperature dependence of magnetic anisotropy shows an increased perpendicular magneto-crystalline contribution at 80K with an in-plane easy axis due to the large shape contribution. We find that our samples show a small FMR linewidth (corresponding to an intrinsic magnetic damping parameter α=0.005), which is a measure of the spin relaxation and directly related with the magnetic and structural quality of the material. In the perpendicular-to-plane geometry, the FMR linewidth shows a minimum at around 200K for all the samples, which seems to be not correlated to the C-doping.Ferromagnetic resonance and magnetic damping in C-doped Mn 5 Ge 3 2The magnetic relaxation parameters have been determined and indicate the twomagnon scattering as the main extrinsic contribution. We observe a change in the main contribution from scattering centres in Mn 5 Ge 3 C 0.2 at low temperatures, which could be related to the minimum in linewidth.

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Section: Magnetic Relaxationmentioning

confidence: 99%

“…The extrinsic contribution generally include the magnetic relation due to magnon-magnon interaction, the twomagnon interaction, which is given by [21,22,23,24]:…”

Section: Model and Geometrymentioning

confidence: 99%

Ferromagnetic resonance and magnetic damping in C-doped Mn₅Ge₃

Dutoit¹,

Dolocan²,

Kuz’min³

et al. 2015

J. Phys. D: Appl. Phys.

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“…The switching process, done with external field or current induced spin-transfer [1] is substantially affected by magnetic damping phenomena present in such systems. The following three mechanisms are usually held responsible for the relaxation of the magnetisation direction in metallic ferromagnets: Gilbert damping [2,3], spin pumping [4,5] and two-magnon scattering [6,7]. The first of them originates from the spin-orbit (SO) interaction which couples the spins of electrons to the lattice, and thus leads to a torque exerted on the magnetisation as its direction varies with time.…”

Section: Introductionmentioning

confidence: 99%

Calculation of Gilbert damping in ferromagnetic ﬁlms

Barati

Cinal

Edwards

et al. 2013

EPJ Web of Conferences

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Abstract. The Gilbert damping constant in the phenomenological Landau-Lifshitz-Gilbert equation which describes the dynamics of magnetization, is calculated for Fe, Co and Ni bulk ferromagnets, Co films and Co/Pd bilayers within a nine-band tight-binding model with spin-orbit coupling included. The calculational efficiency is remarkably improved by introducing finite temperature into the electronic occupation factors and subsequent summation over the Matsubara frequencies. The calculated dependence of Gilbert damping constant on scattering rate for bulk Fe, Co and Ni is in good agreement with the results of previous ab initio calculations. Calculations are reported for ferromagnetic Co metallic films and Co/Pd bilayers. The dependence of the Gilbert damping constant on Co film thickness, for various scattering rates, is studied and compared with recent experiments.

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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%

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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Two magnon scattering in ultrathin ferromagnets: The case where the magnetization is out of plane

Cited by 136 publications

References 24 publications

Ferromagnetic resonance and magnetic damping in C-doped Mn₅Ge₃

Ferromagnetic resonance and magnetic damping in C-doped Mn₅Ge₃

Calculation of Gilbert damping in ferromagnetic ﬁlms

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

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Two magnon scattering in ultrathin ferromagnets: The case where the magnetization is out of plane

Cited by 136 publications

References 24 publications

Ferromagnetic resonance and magnetic damping in C-doped Mn5Ge3

Ferromagnetic resonance and magnetic damping in C-doped Mn5Ge3

Calculation of Gilbert damping in ferromagnetic ﬁlms

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

Contact Info

Product

Resources

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Ferromagnetic resonance and magnetic damping in C-doped Mn₅Ge₃

Ferromagnetic resonance and magnetic damping in C-doped Mn₅Ge₃