Spin Dynamics in the Time and Frequency Domain

Farle, Michael; Silva, Thomas J.; Woltersdorf, Georg

doi:10.1007/978-3-642-32042-2_2

Cited by 32 publications

(21 citation statements)

References 97 publications

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“…This is supported by an intensity change of the main signal around 62 in Figs. 2(b) (8) in 90 orientation has a significantly lower resonance field than the simulated one, which will be discussed later. The simulated spectra in Fig.…”

Section: A the Complete Angular Dependencementioning

confidence: 72%

“…19,20 Snapshot (6) shows that the quasi-uniform mode is much stronger localized for the magnetically hard direction due to an enhanced inhomogeneity of the static demagnetizing field along the short axis of the stripe. Since this inhomogeneity increases towards the edges the localization is enhanced in snapshots (7) and (8), depicting the resonance modes occurring at higher fields. The modes shown in snapshots (7) are localized excitations as discussed before for modes (3) in the easy direction in Figs.…”

Section: Magnetic Field Parallel To Hard Direction (90 )mentioning

confidence: 98%

“…Here, we focus on FMR, which is a powerful technique for the characterization of static and dynamic properties in magnetic solids. 7,8 Planar microresonators (PMR) 9 provide a sensitivity of 10 6 l B which allows the detection of excitation modes in a single Py stripe with size of 5.04 Â 0.59 Â 0.056 lm 3 . So far PMR-FMR has been restricted to one fixed orientation of the sample to the externally applied magnetic field providing access to a magnetically hard or easy direction of a sample only.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Angular dependent ferromagnetic resonance analysis in a single micron sized cobalt stripe

Schoeppner

Wagner

Stienen

et al. 2014

Journal of Applied Physics

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We demonstrate how planar microresonators (PMRs) can be utilized to investigate the angular dependent magnetic resonance response of single magnetic nanostructures. In contrast to alternative detection schemes like electrical or optical detection, the PMR approach provides a classical means of investigating the high frequency dynamics of single magnetic entities, enabling the use of well-established analysis methods of ferromagnetic resonance (FMR) spectroscopy. To demonstrate the performance of the PMR-based FMR setup for angular dependent measurements, we investigate the microwave excited magnons in a single Co stripe of 5 Â 1 Â 0.02 lm 3 and compare the results to micromagnetic simulations. The evolution of excited magnons under rotation of one individual stripe with respect to a static magnetic field is investigated. Besides quasi uniform excitations, we observe magneto-static as well as localized excitations. We find a strong influence of inhomogeneous dynamic and static demagnetizing fields for all modes. V

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Section: A the Complete Angular Dependencementioning

confidence: 72%

Section: Magnetic Field Parallel To Hard Direction (90 )mentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

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Angular dependent ferromagnetic resonance analysis in a single micron sized cobalt stripe

Schoeppner

Wagner

Stienen

et al. 2014

Journal of Applied Physics

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“…To describe the FMR linewidth we consider three mechanisms: intrinsic Gilbert damping, two-magnon scattering (TMS) and inhomogeneous line broadening [27,28]. Approximately, their contributions to the total line half-width at half-maximum (HWHM), ∆H, can be considered as additive:…”

Section: Fmr Linewidth Gilbert Dampingmentioning

confidence: 99%

Mechanisms of FMR line broadening in CoFeB-LiNbO3 granular films in the vicinity of metal-insulator transition

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Крейнес

Barkalova

et al. 2020

Journal of Magnetism and Magnetic Materials

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Metal-insulator (CoFeB) x (LiNbO 3 ) 100−x nanocomposite films with different content of the ferromagnetic (FM) phase x are investigated by ferromagnetic resonance (FMR) technique. A strong change of the FMR line shape is observed in the vicinity of metal-insulator transition (MIT) of the film, where the hopping-type conductivity σ modifies to the regime of a strong intergranular tunnelling, characterized by a logarithmic dependence σ(T ) at high temperatures. It is shown that below MIT, the FMR linewidth is mainly determined by the inhomogeneous distribution of the local anisotropy axes in the film plane. Above MIT, the contribution of this inhomogeneity to the line broadening decreases. At the same time, two-magnon magnetic relaxation processes begin to play a significant role in the formation of the linewidth. The observed behaviour indicates the critical role of interparticle exchange in the tunnelling regime above MIT of the nanocomposite.

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“…The success of engineering spintronics depends on a deeper understanding of fundamental spin interactions in solid-state materials. 4 Dilute magnetic semiconductors (DMS) have been intensively studied since 1980s. 5,6 The current renaissance of interest in magnetic semiconductors is due to their various functionalities relevant to spintronic devices.…”

Section: Introductionmentioning

confidence: 99%

Spin relaxation time dependence on optical pumping intensity in GaAs:Mn

Burobina

Binek

2014

Journal of Applied Physics

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We analyze the dependence of electron spin relaxation time on optical pumping intensity in a partially compensated acceptor semiconductor GaAs:Mn using analytic solutions for the kinetic equations of the charge carrier concentrations. Our results are applied to previous experimental data of spin-relaxation time vs. excitation power for magnetic concentrations of approximately 1017 cm−3. The agreement of our analytic solutions with the experimental data supports the mechanism of the earlier-reported atypically long electron-spin relaxation time in the magnetic semiconductor.

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Spin Dynamics in the Time and Frequency Domain

Cited by 32 publications

References 97 publications

Angular dependent ferromagnetic resonance analysis in a single micron sized cobalt stripe

Angular dependent ferromagnetic resonance analysis in a single micron sized cobalt stripe

Mechanisms of FMR line broadening in CoFeB-LiNbO3 granular films in the vicinity of metal-insulator transition

Spin relaxation time dependence on optical pumping intensity in GaAs:Mn

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