Anisotropic spin-density distribution and magnetic anisotropy of strained La1-x Sr x MnO3 thin films: Angle-dependent X-ray magnetic circular dichroism

Goro Shibata, Miho Kitamura, Makoto Minohara, Kohei Yoshimatsu, Toshiharu Kadono, Keisuke Ishigami, Takayuki Harano, Yukio Takahashi, Shoya Sakamoto, Yosuke Nonaka, Keisuke Ikeda, Zhendong Chi, Mitsuho Furuse, Shuichiro Fuchino, Makoto Okano, Jun Ichi Fujihira, Akira Uchida, Kazunori Watanabe, Hideyuki Fujihira, Seiichi FujihiraArata Tanaka, Hiroshi Kumigashira, Tsuneharu Koide, Atsushi Fujimori

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Magnetic anisotropies of ferromagnetic thin films are induced by epitaxial strain from the substrate via strain-induced anisotropy in the orbital magnetic moment and that in the spatial distribution of spin-polarized electrons. However, the preferential orbital occupation in ferromagnetic metallic La1-x Sr x MnO3 (LSMO) thin films studied by X-ray linear dichroism (XLD) has always been found out-of-plane for both tensile and compressive epitaxial strain and hence irrespective of the magnetic anisotropy. In order to resolve this mystery, we directly probed the preferential orbital occupation of spin-polarized electrons in LSMO thin films under strain by angle-dependent X-ray magnetic circular dichroism (XMCD). Anisotropy of the spin-density distribution was found to be in-plane for the tensile strain and out-of-plane for the compressive strain, consistent with the observed magnetic anisotropy. The ubiquitous out-of-plane preferential orbital occupation seen by XLD is attributed to the occupation of both spin-up and spin-down out-of-plane orbitals in the surface magnetic dead layer.

Original languageEnglish
Article number3
Journalnpj Quantum Materials
Volume3
Issue number1
DOIs
Publication statusPublished - 2018 Dec 1
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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  • Cite this

    Shibata, G., Kitamura, M., Minohara, M., Yoshimatsu, K., Kadono, T., Ishigami, K., Harano, T., Takahashi, Y., Sakamoto, S., Nonaka, Y., Ikeda, K., Chi, Z., Furuse, M., Fuchino, S., Okano, M., Fujihira, J. I., Uchida, A., Watanabe, K., Fujihira, H., ... Fujimori, A. (2018). Anisotropic spin-density distribution and magnetic anisotropy of strained La1-x Sr x MnO3 thin films: Angle-dependent X-ray magnetic circular dichroism. npj Quantum Materials, 3(1), [3]. https://doi.org/10.1038/s41535-018-0077-4