TITLE

Microwave assisted magnetization reversal in composite media

AUTHOR(S)
Shaojing Li; Livshitz, Boris; Bertram, H. Neal; Schabes, Manfred; Schrefl, Thomas; Fullerton, Eric E.; Lomakin, Vitaliy
PUB. DATE
May 2009
SOURCE
Applied Physics Letters;5/18/2009, Vol. 94 Issue 20, p202509
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Magnetic reversal in exchange-coupled composite elements under microwave fields is characterized by several unique properties including reduced reversal fields, microwave fields, microwave resonant frequencies, and reduced sensitivity to anisotropy distributions as compared to homogeneous elements. We find that reversal can occur in uniform and nonuniform regimes. The uniform regime is characterized by coherent spin precession enhancement by the microwave field. In the nonuniform regime domain walls in the soft layer mediate reversal and under linearly polarized microwave fields, can lead to a formation of localized reversal/nonreversal areas in the “applied field-frequency” phase plane.
ACCESSION #
40125703

 

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