Quantized spin excitations in a ferromagnetic microstrip from microwave photovoltage measurements.
Quantized spin excitations in a single ferromagnetic microstrip have been measured using the microwave photovoltage technique. Several kinds of spin wave modes due to different contributions of the dipole-dipole and the exchange interactions are observed. Among them are a series of distinct dipole-exchange spin wave modes, which allow us to determine precisely the subtle spin boundary condition. A comprehensive picture for quantized spin excitations in a ferromagnet with finite size is thereby established. The dispersions of the quantized spin wave modes have two different branches separated by the saturation magnetization.
Department of Physics and Astronomy, University of Manitoba, Winnipeg, Canada R3T 2N2. ysgui@physics.umanitoba.ca
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