Microwave assisted magnetization reversal has been investigated in a bilayer system of Pt/ferromagnet by detecting a change in the polarity of the spin pumping signal. The reversal process is studied in two material systems, Pt/CoFeB and Pt/NiFe, for different aspect ratios. The onset of the switching behavior is indicated by a sharp transition in the spin pumping voltage. At a threshold value of the external field, the switching process changes from partial to full reversal with increasing microwave power. The proposed method provides a simple way to detect microwave assisted magnetization reversal.
Electrical detection of microwave assisted magnetization reversal by spin pumping
Siddharth Rao, Sankha Subhra Mukherjee, Mehrdad Elyasi, Charanjit Singh Bhatia, Hyunsoo Yang; Electrical detection of microwave assisted magnetization reversal by spin pumping. Appl. Phys. Lett. 24 March 2014; 104 (12): 122406. https://doi.org/10.1063/1.4869488
Download citation file: