Direct-current effects on magnetization reversal properties of submicron-size Permalloy patterns for radio-frequency devices

Hanqiao Zhang, Axel Hoffmann, Ralu Divan, Pingshan Wang

Research output: Contribution to journalArticlepeer-review

Abstract

Ferromagnetic resonance (FMR) spectroscopy is used to measure direct-current (dc) effects on the magnetization reversal properties of submicron-sized lateral patterned magnetic material. The observed FMR frequency-field relationship shows that for both 240 and 550 nm wide Permalloy (Py) nanowires the coercivity is reduced by ∼33% when a 50 mA dc passes through the transmission line where the nanowires are incorporated. The temperature dependence of the coercivity has a T relationship which suggests the coherent rotation mode tendency in such 100 nm thick Py nanowires.

Original languageEnglish (US)
Article number232503
JournalApplied Physics Letters
Volume95
Issue number23
DOIs
StatePublished - Dec 18 2009
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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