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Spin Torque Oscillator With Negative Magnetic Anisotropy Materials for MAMR

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4 Author(s)
Yoshida, K. ; Dept. of Inf. & Commun. Eng., Kogakuin Univ., Tokyo, Japan ; Yokoe, M. ; Ishikawa, Y. ; Kanai, Y.

Microwave assisted magnetic recording (MAMR) has recently emerged as a candidate to solve the trilemma in magnetic recording. In MAMR the magnetizations of recording medium can be switched with much lower magnetic field by magnetic resonance, which however requires a higher frequency oscillator than 20 GHz. In this paper, it is described that spin torque oscillator (STO) using a magnetic material with a large negative uniaxial anisotropy has a possibility to generate higher frequency and stable magnetic field and it might be preferable to a conventional oscillator with soft magnetic materials.

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Magnetics, IEEE Transactions on  (Volume:46 ,  Issue: 6 )