Electric-field-induced changes of magnetic moments and magnetocrystalline anisotropy in ultrathin cobalt films

Takeshi Kawabe, Kohei Yoshikawa, Masahito Tsujikawa, Takuya Tsukahara, Kohei Nawaoka, Yoshinori Kotani, Kentaro Toyoki, Minori Goto, Motohiro Suzuki, Tetsuya Nakamura, Masafumi Shirai, Yoshishige Suzuki, Shinji Miwa

Research output: Contribution to journalArticlepeer-review

32 Citations (Scopus)

Abstract

In this study, the microscopic origins of the voltage-controlled magnetic anisotropy (VCMA) in 3d-ferromagnetic metals are revealed. Using in situ x-ray fluorescence spectroscopy that provides a high quantum efficiency, electric-field-induced changes in orbital magnetic moment and magnetic dipole Tz terms in ultrathin Co films are demonstrated. An orbital magnetic moment difference of 0.013μB was generated in the presence of electric fields of ±0.2V/nm. The VCMA of Co was properly estimated by the induced change in orbital magnetic moment, according to the perturbation theory model. The induced change in the magnetic dipole Tz term only slightly contributed to the VCMA in 3d-ferromagnetic metals.

Original languageEnglish
Article number220412
JournalPhysical Review B
Volume96
Issue number22
DOIs
Publication statusPublished - 2017 Dec 26

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Fingerprint Dive into the research topics of 'Electric-field-induced changes of magnetic moments and magnetocrystalline anisotropy in ultrathin cobalt films'. Together they form a unique fingerprint.

Cite this