Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Radiative damping in wave guide based FMR measured via analysis of perpendicular standing spin waves in sputtered Permalloy films

Published

Author(s)

Thomas J. Silva, Justin M. Shaw, Hans T. Nembach, Mathias Weiler, Martin Schoen

Abstract

The damping α of the spinwave resonances in 75 nm, 120 nm, and 200 nm -thick Permalloy films is measured via vector-network- analyzer ferromagnetic-resonance (VNA-FMR). Inductive coupling between the sample and the waveguide leads to an additional radiative damping term. The radiative contribution to the over-all damping is determined by measuring perpendicular standing spin waves (PSSWs) in the Permalloy films, and the results are compared to a simple analytical model. The damping of the PSSWs can be fully explained by three contributions to the damping: The intrinsic damping, the eddy-current damping, and the radiative damping. No other contributions were observed. Furthermore, a method to determine the radiative damping in FMR measurements with a single resonance is suggested.
Citation
Journal of Applied Physics
Volume
92

Citation

Silva, T. , Shaw, J. , Nembach, H. , Weiler, M. and Schoen, M. (2015), Radiative damping in wave guide based FMR measured via analysis of perpendicular standing spin waves in sputtered Permalloy films, Journal of Applied Physics, [online], https://doi.org/10.1103/PhysRevB.92.184417 (Accessed June 18, 2024)

Issues

If you have any questions about this publication or are having problems accessing it, please contact reflib@nist.gov.

Created November 17, 2015, Updated November 10, 2018