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-e...

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Bibliographic Details
Published in:arXiv.org 2007-04
Main Authors: Gui, Y S, Mecking, N, C -M Hu
Format: Article
Language:English
Subjects:
Boundary conditions
Dipoles
Electrons
Exchanging
Excitation
Ferromagnetism
Magnetic saturation
Magnetism
Magnons
Online Access:Get full text
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Summary: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.
ISSN:2331-8422
DOI:10.48550/arxiv.0704.3397