Tuning magnetic anisotropy by interfacially engineering the oxygen coordination environment in a transition metal oxide

Daisuke Kan, Ryotaro Aso, Riko Sato, Mitsutaka Haruta, Hiroki Kurata, Yuichi Shimakawa

Research output: Contribution to journalArticle

104 Citations (Scopus)

Abstract

Strong correlations between electrons, spins and lattices - stemming from strong hybridization between transition metal d and oxygen p orbitals - are responsible for the functional properties of transition metal oxides. Artificial oxide heterostructures with chemically abrupt interfaces provide a platform for engineering bonding geometries that lead to emergent phenomena. Here we demonstrate the control of the oxygen coordination environment of the perovskite, SrRuO3, by heterostructuring it with Ca0.5Sr0.5TiO3 (0-4 monolayers thick) grown on a GdScO3 substrate. We found that a Ru-O-Ti bond angle of the SrRuO3/Ca0.5Sr0.5TiO3 interface can be engineered by layer-by-layer control of the Ca0.5Sr0.5TiO3 layer thickness, and that the engineered Ru-O-Ti bond angle not only stabilizes a Ru-O-Ru bond angle never seen in bulk SrRuO3, but also tunes the magnetic anisotropy in the entire SrRuO3 layer. The results demonstrate that interface engineering of the oxygen coordination environment allows one to control additional degrees of freedom in functional oxide heterostructures.

Original languageEnglish
Pages (from-to)432-437
Number of pages6
JournalNature Materials
Volume15
Issue number4
DOIs
Publication statusPublished - Apr 1 2016
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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