Structural and magnetic anisotropy in the epitaxial FeV2O4 (110) spinel thin films
Xiaolan Shi,
Yuhang Wang,
Kehan Zhao,
Na Liu,
Gaofeng Sun,
Liuwan Zhang
Affiliations
Xiaolan Shi
State Key Laboratory of Low-Dimensional Quantum Physics, Collaborative Innovation Center of Quantum Matter, Department of Physics, Tsinghua University, Beijing 100084, China
Yuhang Wang
State Key Laboratory of Low-Dimensional Quantum Physics, Collaborative Innovation Center of Quantum Matter, Department of Physics, Tsinghua University, Beijing 100084, China
Kehan Zhao
State Key Laboratory of Low-Dimensional Quantum Physics, Collaborative Innovation Center of Quantum Matter, Department of Physics, Tsinghua University, Beijing 100084, China
Na Liu
State Key Laboratory of Low-Dimensional Quantum Physics, Collaborative Innovation Center of Quantum Matter, Department of Physics, Tsinghua University, Beijing 100084, China
Gaofeng Sun
State Key Laboratory of Low-Dimensional Quantum Physics, Collaborative Innovation Center of Quantum Matter, Department of Physics, Tsinghua University, Beijing 100084, China
Liuwan Zhang
State Key Laboratory of Low-Dimensional Quantum Physics, Collaborative Innovation Center of Quantum Matter, Department of Physics, Tsinghua University, Beijing 100084, China
The epitaxial 200-nm-thick FeV2O4(110) films on (110)-oriented SrTiO3, LaAlO3 and MgAl2O4 substrates were fabricated for the first time by pulsed laser deposition, and the structural, magnetic, and magnetoresistance anisotropy were investigated systematically. All the films are monoclinic, whereas its bulk is cubic. Compared to FeV2O4 single crystals, films on SrTiO3 and MgAl2O4 are strongly compressively strained in [001] direction, while slightly tensily strained along normal [110] and in-plane [ 1 1 ¯ 0 ] directions. In contrast, films on LaAlO3 are only slightly distorted from cubic. The magnetic hard axis is in direction, while the easier axis is along normal [110] direction for films on SrTiO3 and MgAl2O4, and in-plane [ 1 1 ¯ 0 ] direction for films on LaAlO3. Magnetoresistance anisotropy follows the magnetization. The magnetic anisotropy is dominated by the magnetocrystalline energy, and tuned by the magneto-elastic coupling.
