Observation of ferromagnetic resonance in strontium ruthenate (SrRuO3)
M. C. Langner, C. L. S. Kantner, Y. H. Chu, L. W. Martin, P. Yu, R., Ramesh, and J. Orenstein
TL;DR
This paper reports the first observation of ferromagnetic resonance in SrRuO3, revealing high-frequency oscillations and strong spin-orbit coupling effects through time-resolved magneto-optical measurements.
Contribution
It demonstrates ferromagnetic resonance in SrRuO3 and links magnetization dynamics parameters to temperature-dependent phenomena like the anomalous Hall effect.
Findings
FMR observed at 250 GHz in SrRuO3
Large Gilbert damping parameter (~1) indicating strong spin-orbit coupling
Non-monotonic temperature dependence of magnetization dynamics parameters
Abstract
We report the observation of ferromagnetic resonance (FMR) in SrRuO3 using the time-resolved magneto-optical Kerr effect. The FMR oscillations in the time-domain appear in response to a sudden, optically induced change in the direction of easy-axis anistropy. The high FMR frequency, 250 GHz, and large Gilbert damping parameter, alpha ~ 1, are consistent with strong spin-orbit coupling. We find that the parameters associated with the magnetization dynamics, including alpha, have a non-monotonic temperature dependence, suggestive of a link to the anomalous Hall effect.
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Taxonomy
TopicsAdvanced Condensed Matter Physics · Magnetic and transport properties of perovskites and related materials · Multiferroics and related materials