Voltage-Controlled Magnetic Anisotropy in Fe1-xCox/Pd/MgO system

Amit Kumar Shukla; Minori Goto; Xiandong Xu; Kohei Nawaoka; Joko Suwardy; Tadakatsu Ohkubo; Kazuhiro Hono; Shinji Miwa; Yoshishige Suzuki

doi:10.1038/s41598-018-28445-3

Voltage-Controlled Magnetic Anisotropy in Fe_1-xCo_x/Pd/MgO system

Sci Rep. 2018 Jul 9;8(1):10362. doi: 10.1038/s41598-018-28445-3.

Authors

Amit Kumar Shukla^{1

2}, Minori Goto^{1

3}, Xiandong Xu⁴, Kohei Nawaoka¹, Joko Suwardy¹, Tadakatsu Ohkubo⁴, Kazuhiro Hono⁴, Shinji Miwa^{1

3}, Yoshishige Suzuki^{5

6

7}

Affiliations

¹ Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka, 560-8531, Japan.
² Center for Materials research by Information Integration (CMI2), Research and Services Division of Materials Data and Integrated System (MaDIS), National Institute for Materials Science (NIMS), Tsukuba, Ibaraki, 305-0047, Japan.
³ Center for Spintronics Research Network (CSRN), Osaka University, Toyonaka, Osaka, 560-8531, Japan.
⁴ Research Center for Magnetic and Spintronic Materials, National Institute for Materials Science (NIMS), Tsukuba, Ibaraki, 305-0047, Japan.
⁵ Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka, 560-8531, Japan. suzuki-y@mp.es.osaka-u.ac.jp.
⁶ Center for Spintronics Research Network (CSRN), Osaka University, Toyonaka, Osaka, 560-8531, Japan. suzuki-y@mp.es.osaka-u.ac.jp.
⁷ Center for Materials research by Information Integration (CMI2), Research and Services Division of Materials Data and Integrated System (MaDIS), National Institute for Materials Science (NIMS), Tsukuba, Ibaraki, 305-0047, Japan. suzuki-y@mp.es.osaka-u.ac.jp.

Abstract

Voltage-controlled magnetic anisotropy (VCMA) in an epitaxially grown Fe/Fe_1-xCo_x/Pd/MgO system was investigated using spin-wave spectroscopy. The spin-wave resonant frequency linearly depended on the bias-voltage. The resonant-frequency shift increased with the Co fraction in Fe_1-xCo_x/Pd. We achieved a VCMA of approximately 250 fJ/Vm at the Co/Pd/MgO region.