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

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number262408
JournalApplied Physics Letters
Volume112
Issue number26
DOIs
Publication statusPublished - 2018 Jun 25

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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