Ferrimagnetic Spin Dynamics beyond Ferro- and Antiferro-magnetic Scenarios
ORAL
Abstract
Ferrimagnets (FIMs) can be operated as antiferromagnets with high frequency while being able to be detected as ferromagnets, providing unique advantages for spintronics applications. It is widely believed that a two-sublattice FIM behaves antiferromagnetically (ferromagnetically) when it approaches (turns away from) the compensation point. We challenge this oversimplified picture by solving the dynamical modes in a simple FIM driven by the exchange interaction, the magnetic anisotropy, and an applied magnetic field. By varying the ratio of sublattice spins, we demonstrate how spin dynamics in FIMs is intrinsically connected to its ferro- and antiferro-magnetic counterparts, and, more importantly, under what conditions FIMs can go beyond these scenarios.
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Presenters
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Mingda Guo
Physics and Astronomy, University of California, Riverside, University of California, Riverside
Authors
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Mingda Guo
Physics and Astronomy, University of California, Riverside, University of California, Riverside
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Hantao Zhang
Electrical and Computer Engineering, University of California, Riverside, University of California, Riverside, Department of Electrical and Computer Engineering, University of California, Riverside
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Ran Cheng
University of California, Riverside, Electrical and Computer Engineering, University of California, Riverside, Department of Electrical and Computer Engineering, University of California, Riverside, University of California - Riverside