Perpendicular Magnetic Anisotropy in Conducting NiCo2O4 Films from Spin-Lattice Coupling

Corbyn Mellinger; Jace Waybright; Xiaozhe Zhang; Caleb Schmidt; Xiaoshan Xu

doi:10.1103/PhysRevB.101.014413

Perpendicular Magnetic Anisotropy in Conducting NiCo2O4 Films from Spin-Lattice Coupling

Materials Science 2020-01-15 v1

Authors: Corbyn Mellinger , Jace Waybright , Xiaozhe Zhang , Caleb Schmidt , Xiaoshan Xu

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Abstract

High perpendicular magnetic anisotropy (PMA), a property needed for nanoscale spintronic applications, is rare in oxide conductors. We report the observation of a PMA up to 0.23 MJ/m3 in modestly strained epitaxial NiCo2O4 (NCO) films which are room-temperature ferrimagnetic conductors. Spin-lattice coupling manifested as magnetoelastic effect was found as the origin of the PMA. The in-plane xx-yy states of Co on tetrahedral sites play crucial role in the magnetic anisotropy and spin-lattice coupling with an energy scale of 1 meV/f.u. The elucidation of the microscopic origin paves a way for engineering oxide conductors for PMA using metal/oxygen hybridizations.

Keywords

perpendicular magnetic anisotropy nicoo4 films spin-lattice coupling magnetoelectric effect oxide conductors spintronics

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@article{arxiv.1911.05322,
  title  = {Perpendicular Magnetic Anisotropy in Conducting NiCo2O4 Films from Spin-Lattice Coupling},
  author = {Corbyn Mellinger and Jace Waybright and Xiaozhe Zhang and Caleb Schmidt and Xiaoshan Xu},
  journal= {arXiv preprint arXiv:1911.05322},
  year   = {2020}
}

Perpendicular Magnetic Anisotropy in Conducting NiCo2O4 Films from Spin-Lattice Coupling

Abstract

Keywords

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