Observation of microwave-assisted magnetization reversal in Fe65Co35 thin films through ferromagnetic resonance measurements

Nistor, Corneliu; Ke Sun; Zihui Wang; Mingzhong Wu; Mathieu, Christoph; Hadley, Matthew
July 2009
Applied Physics Letters;7/6/2009, Vol. 95 Issue 1, p012504
Academic Journal
This letter reports a new approach for microwave-assisted magnetization reversal (MAMR) measurements and the demonstration of MAMR in a Fe65Co35 thin film with this approach. The approach uses a microstrip line to deliver microwaves to and measure the ferromagnetic resonance (FMR) of the sample. The switching field is determined through the measurements of the FMR absorption as a function of static field. In the presence of microwaves, a reduction in switching field by 50% was observed in a Fe65Co35 film. This reduction was independent of the duration of microwave pulses. This indicates the reduction is not a heating effect.


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