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Microwave assisted magnetic recording (MAMR) technology, with microwave generated by the spin transfer oscillator (STO) as energy assisted source, is potential for future magnetic recording technique.
Spin-torque oscillator (STO) with reference layer (REF) has been proposed to be an efficient way to excite oscillation at low current density [1-2]. A well-controlled STO is the center part of microwave assisted magnetic recording (MAMR); however, in the recording process, the STO is exposed in an alternative external head field in addition to the applied current [3-4]. To assist the writing in MAMR,...
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