Spin wave contributions to the high-frequency magnetic response of thin films obtained with inductive methods

Counil, G.; Kim, Joo-Von; Devolder, T.; Chappert, C.; Shigeto, K.; Otani, Y.

doi:10.1063/1.1697641

Cited by 159 publications

(133 citation statements)

References 13 publications

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“…It has the form ∆H LF ∝ f −ρ with ρ ∈ R + . 33,34 The second term represents the line broadening due to inhomogeneity of the sample and has two components: i) a constant term and ii) a mosaicity term of the form ∝ ∂H r /∂φ H , where H r is the resonance field. 31,35 The third term describes Gilbert-type damping which is proportional to the Gilbert constant α.…”

Section: -3mentioning

confidence: 99%

Magnetic anisotropy, damping, and interfacial spin transport in Pt/LSMO bilayers

et al. 2016

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We report ferromagnetic resonance measurements of magnetic anisotropy and damping in epitaxial La0.7Sr0.3MnO3 (LSMO) and Pt capped LSMO thin films on SrTiO3 (001) substrates. The measurements reveal large negative perpendicular magnetic anisotropy and a weaker uniaxial in-plane anisotropy that are unaffected by the Pt cap. The Gilbert damping of the bare LSMO films is found to be low α = 1.9(1) × 10−3, and two-magnon scattering is determined to be significant and strongly anisotropic. The Pt cap increases the damping by 50% due to spin pumping, which is also directly detected via inverse spin Hall effect in Pt. Our work demonstrates efficient spin transport across the Pt/LSMO interface.

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Section: -3mentioning

confidence: 99%

Magnetic anisotropy, damping, and interfacial spin transport in Pt/LSMO bilayers

et al. 2016

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“…At low frequencies, the relaxation rate increases, as it has already been shown in earlier studies. 10,[14][15][16] The frequency response of the PIMM analysis was used to determine the system's resonance frequency for the TR-FMR measurements. We measured the sample response We also investigated the whether the number of generated field pulses will have any effect on the relaxation rate of the system when the pulse sequence is turned off.…”

Section: A Small Angle Responsementioning

confidence: 99%

Large-angle magnetization dynamics measured by time-resolved ferromagnetic resonance

et al. 2006

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A time-resolved ferromagnetic resonance technique was used to investigate the magnetization dynamics of a 10 nm thin Permalloy film. The experiment consisted of a sequence of magnetic field pulses at a repetition rate equal to the magnetic system's resonance frequency. We compared data obtained by this technique with conventional pulsed inductive microwave magnetometry. The results for damping and frequency response obtained by these two different methods coincide in the limit of a small angle excitation. However, when applying large amplitude field pulses, the magnetization had a non-linear response. We speculate that one possible cause of the nonlinearity is related to self-amplification of incoherence, known as the Suhl instabilities.2

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“…These setups are useful for accurately measuring spin wave excitations which are used as a probe for characterizing magnetic surfaces and buried interfaces. However, consideration needs to be made of the experimental setup when analyzing results [2,5,6,7,8,9]. In particular, Schneider et al [5] mention that measured response is dependent on the distance of the film from the coplanar surface due to a change in strip line impedance.…”

Section: Introductionmentioning

confidence: 99%

“…Their main part is a section of a coplanar or a microstrip microwave transmission line ("'microwave transducer") on which top the sample under investigation sits. Absorption of microwave power by the transmission line loaded by the sample is measured by a network analyzer [2] or by a combination of a microwave generator and microwave passive components [4]. These setups are useful for accurately measuring spin wave excitations which are used as a probe for characterizing magnetic surfaces and buried interfaces.…”

Section: Introductionmentioning

confidence: 99%

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Strong asymmetry of microwave absorption by bilayer conducting ferromagnetic films in the microstrip-line based broadband ferromagnetic resonance

Kostylev

2009

Journal of Applied Physics

126

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Peculiarities of ferromagnetic resonance response of conducting magnetic bi-layer films of nanometric thicknesses excited by microstrip microwave transducers have been studied theoretically.Strong asymmetry of the response has been found. Depending on the order of layers with respect to the transducer either the first higher-order standing spin wave mode, or the fundamental mode shows the largest response. Film conductivity and lowered symmetry of microwave fields of such transducers are responsible for this behavior. Amplitude of which mode is larger also depends on the driving frequency. This effect is explained as shielding of the asymmetric transducer field by eddy currents in the films. This shielding remains very efficient for films with thicknesses well below the microwave skin depth. This effect may be useful for studying buried magnetic interfaces and should be accounted for in future development of broadband inductive ferromagnetic resonance methods.

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Spin wave contributions to the high-frequency magnetic response of thin films obtained with inductive methods

Cited by 159 publications

References 13 publications

Magnetic anisotropy, damping, and interfacial spin transport in Pt/LSMO bilayers

Magnetic anisotropy, damping, and interfacial spin transport in Pt/LSMO bilayers

Large-angle magnetization dynamics measured by time-resolved ferromagnetic resonance

Strong asymmetry of microwave absorption by bilayer conducting ferromagnetic films in the microstrip-line based broadband ferromagnetic resonance

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