Quantized spin excitations in a ferromagnetic microstrip from microwave photovoltage measurements

Details Quantized spin excitations in a ferromagnetic microstrip from microwave photovoltage measurements Quantized spin excitations in a ferromagnetic microstrip from microwave photovoltage measurements

2007-04-25

arxiv.org/abs/0704.3397v1

Phys. Rev. Lett., 98, 217603 (2007)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.98.217603

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.

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