Abstract
The magneto-electric (ME) coupling on spin-wave resonances in single-crystal Cu2OSeO3 was studied by a novel technique using electron spin resonance combined with electric field modulation. An external electric field E induces a magnetic field component μ_0 H^i = γE along the applied magnetic field H with γ=0.7(1) μT/(V/mm) at 10 K. We found that ME coupling strength γis temperature dependent and highly anisotropic. γ(T) nearly follows that of spin susceptibility J(T) and rapidly decreases above the Curie temperature Tc. The ratio γ/J monotonically decreases with increasing temperature without an anomaly at Tc.
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