期刊
IEEE TRANSACTIONS ON MAGNETICS
卷 46, 期 3, 页码 751-757出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TMAG.2009.2036588
关键词
Magnetic recording; MAMR; PSTO; spin transfer torque; STT; STT oscillator
资金
- Data Storage Systems Center at Carnegie Mellon University
In this paper, we present a systematic micromagnetic modeling study on microwave assisted magnetic recording (MAMR) utilizing a perpendicular spin torque oscillator (PSTO) to generate localized circular ac field. The PSTO at narrow track width naturally produces a circular field rotating at desired high frequency within the plane of the media, resulting in a substantially enhanced effective write field gradient. With the STT oscillator generated ac field waveform, recording simulations show that area recording density exceeding 3 Tbits/in(2) can be readily achieved with a medium signal-to-noise ratio above 13 dB (1T-SNR) and thermal stability at K(u)V = 60k(B) T(300 degrees K).
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