Microwave-assisted switching of NiFe magnetic microstructures

作者：Laval M^*; Bonnefois J J; Bobo J F; Issac F; Boust F

来源：Journal of Applied Physics, 2009, 105(7): 073912.

DOI：10.1063/1.3093949

We have calculated by either macrospin analytical method or micromagnetic numerical solving the microwave-assisted switching of a small rectangular platelet as a function of the amplitude and the frequency of a microwave excitation field. The spectral analysis of this phenomenon reveals that microwave-assisted switching is optimal for a rf slightly lower than the linear magnetic resonance frequency measured at low level. Similar experimental results, obtained on 100 mu m scale NiFe structures, reveal the same tendency. Switching time for such a process was obtained from calculations that show that subnanosecond switching times require combinations of large dc and rf magnetic fields.

• 出版日期2009-4-1