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Tuning Perpendicular Magnetic Anisotropy by Oxygen Octahedral Rotations in (La1-xSrxMnO3)/ (SrIrO3) Superlattices

  • Author(s): Yi, D
  • Flint, CL
  • Balakrishnan, PP
  • Mahalingam, K
  • Urwin, B
  • Vailionis, A
  • N'Diaye, AT
  • Shafer, P
  • Arenholz, E
  • Choi, Y
  • Stone, KH
  • Chu, JH
  • Howe, BM
  • Liu, J
  • Fisher, IR
  • Suzuki, Y
  • et al.
Abstract

© 2017 American Physical Society. American Physical Society. Perpendicular magnetic anisotropy (PMA) plays a critical role in the development of spintronics, thereby demanding new strategies to control PMA. Here we demonstrate a conceptually new type of interface induced PMA that is controlled by oxygen octahedral rotation. In superlattices comprised of La1-xSrxMnO3and SrIrO3, we find that all superlattices (0≤x≤1) exhibit ferromagnetism despite the fact that La1-xSrxMnO3is antiferromagnetic for x>0.5. PMA as high as 4×106 erg/cm3 is observed by increasing x and attributed to a decrease of oxygen octahedral rotation at interfaces. We also demonstrate that oxygen octahedral deformation cannot explain the trend in PMA. These results reveal a new degree of freedom to control PMA, enabling discovery of emergent magnetic textures and topological phenomena.

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