TITLE

Electrical detection of microwave assisted magnetization switching in a Permalloy microstrip

AUTHOR(S)
Fan, Xiaolong; Gui, Y. S.; Wirthmann, A.; Williams, G.; Desheng Xue; Hu, C.-M.
PUB. DATE
August 2009
SOURCE
Applied Physics Letters;8/10/2009, Vol. 95 Issue 6, p062511
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Microwave assisted magnetization switching has been investigated in a nonelliptic Permalloy microstrip, using radio frequency magnetic fields h applied in-plane perpendicular to the long axis of the strip. In low power excitations, Hs decreases almost linearly with increasing h; this can be qualitatively understood by introducing an susceptibility χyy that links the dynamic magnetization inside the microstip to the h field outside the microstip. However, at high frequencies, Hs no longer decrease with increasing h when this latter field exceeds a critical value. We suppose such “saturation” effects could attribute to the nonlinear ferromagnetic resonance caused by high power excitations.
ACCESSION #
43720396

 

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