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Tuning Perpendicular Magnetic Anisotropy by Oxygen Octahedral Rotations in (La_{1-x}Sr_{x}MnO_{3})/(SrIrO_{3}) Superlattices.

  • Author(s): Yi, Di;
  • Flint, Charles L;
  • Balakrishnan, Purnima P;
  • Mahalingam, Krishnamurthy;
  • Urwin, Brittany;
  • Vailionis, Arturas;
  • N'Diaye, Alpha T;
  • Shafer, Padraic;
  • Arenholz, Elke;
  • Choi, Yongseong;
  • Stone, Kevin H;
  • Chu, Jiun-Haw;
  • Howe, Brandon M;
  • Liu, Jian;
  • Fisher, Ian R;
  • Suzuki, Yuri
  • et al.
Abstract

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 La_{1-x}Sr_{x}MnO_{3} and SrIrO_{3}, we find that all superlattices (0≤x≤1) exhibit ferromagnetism despite the fact that La_{1-x}Sr_{x}MnO_{3} is antiferromagnetic for x>0.5. PMA as high as 4×10^{6}  erg/cm^{3} 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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