Microwave-assisted magnetization reversal in 0.36-μm -wide Permalloy wires

Y. Nozaki, K. Tateishi, S. Taharazako, M. Ohta, S. Yoshimura, K. Matsuyama

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Abstract

Microwave-assisted magnetization reversal in a 0.36 μm wide Ni80 Fe20 wire with a natural ferromagnetic resonance frequency of 8.42 GHz was investigated experimentally. Magnetization switching could be detected from a discontinuous change in the ferromagnetic resonance frequency of the wire. The application of microwaves with a frequency of 7.5 GHz and a power of 19.2 dBm reduced the switching field from 217 to 142 Oe. While high-power microwave-assisted switching reduced the dc switching field, it substantially broadened the switching field distribution. This is mainly attributed to inhomogeneous resonance properties of the nucleation sites in the wire.

Original languageEnglish
Article number122505
JournalApplied Physics Letters
Volume91
Issue number12
DOIs
Publication statusPublished - 2007 Sep 28
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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    Nozaki, Y., Tateishi, K., Taharazako, S., Ohta, M., Yoshimura, S., & Matsuyama, K. (2007). Microwave-assisted magnetization reversal in 0.36-μm -wide Permalloy wires. Applied Physics Letters, 91(12), [122505]. https://doi.org/10.1063/1.2786593