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Publication Citation: Gyromagnetic damping and the role of spin-wave generation in pulsed inductive microwave magnetometry

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Author(s): Michael Schneider; Thomas Gerrits; Anthony B. Kos; Thomas J. Silva;
Title: Gyromagnetic damping and the role of spin-wave generation in pulsed inductive microwave magnetometry
Published: August 17, 2005
Abstract: The dependence of the magnetodynamic response of thin permalloy films was measured with a pulsed inductive microwave magnetometer as a function of varying width of the coplanar waveguide center conductor (220 to 990 υm), frequency (0.6 to 2 GHz) and film thickness (25 to 93 nm) to ascertain the role of magnetostatic spin-wave generation in the low-frequency enhancement of the measured decay rate. A component of the decay rate depends on δw, the ratio of film thickness to center conductor width as theoretically predicted. However, there is an anomalous contribution to the frequency dependence of the decay rate exists that cannot be attributed to the generation of spin-waves.
Citation: Applied Physics Letters
Volume: 87
Issue: 072509
Pages: pp. 072509/1 - 072509/3
Keywords: damping;magnetodynamics;permalloy;pulsed inductive microwave magnetometer
Research Areas: Electromagnetics
PDF version: PDF Document Click here to retrieve PDF version of paper (131KB)