Spin torque diode effect of the magnetic tunnel junction with MnGa free layer

Sumito Tsunegi, Kotaro Mizunuma, Kazuya Suzuki, Hiroshi Imamura, Shingo Tamaru, Masahiro Yoshimura, Masashige Sato, Yasushi Kono, Hiroyuki Wado, Akio Fukushima, Hitoshi Kubota, Shigemi Mizukami

研究成果: Article査読

7 被引用数 (Scopus)

抄録

We fabricated a magnetic tunnel junction (MTJ) using an MgO barrier and MnGa electrode, which shows large magnetic anisotropy, and we investigated the spin torque diode effect in the MTJ. The magnetoresistance ratio increased up to approximately 40% by inserting thin FeB/Fe layers at the MnGa/MgO interface. The obtained diode effect was as high as 70 GHz, which is thought to occur due to the coupled precession acoustic mode in the MnGa/Fe-B multi-layer. Numerical simulation suggests that a very high frequency diode signal of more than 150 GHz can be expected in the optical mode precession.

本文言語English
論文番号262408
ジャーナルApplied Physics Letters
112
26
DOI
出版ステータスPublished - 2018 6 25

ASJC Scopus subject areas

  • 物理学および天文学(その他)

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