Quantized spin excitations in a ferromagnetic microstrip from microwave photovoltage measurements

Abstract

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.

4 pages, 3 figures

References in corpus (4)

• Spin-transfer-driven ferromagnetic resonance of individual nanomagnets
• Spatially Resolved Dynamics of Localized Spin-Wave Modes in Ferromagnetic Wires
• Anomalous behavior of spin wave resonances in Ga_{1-x}Mn_{x}As thin films
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