| Autor: |
Ma CT; Department of Physics, University of Virginia, Charlottesville, VA 22904, USA., Kittiwatanakul S; Department of Physics, University of Virginia, Charlottesville, VA 22904, USA.; Department of Physics, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand., Sittipongpittaya A; Department of Physics, University of Virginia, Charlottesville, VA 22904, USA., Wang Y; Department of Physics, University of Virginia, Charlottesville, VA 22904, USA., Morshed MG; Department of Electrical and Computer Engineering, University of Virginia, Charlottesville, VA 22904, USA., Ghosh AW; Department of Physics, University of Virginia, Charlottesville, VA 22904, USA.; Department of Electrical and Computer Engineering, University of Virginia, Charlottesville, VA 22904, USA., Poon SJ; Department of Physics, University of Virginia, Charlottesville, VA 22904, USA.; Department of Material Science and Engineering, University of Virginia, Charlottesville, VA 22904, USA. |
| Abstrakt: |
The ability to manipulate spins in magnetic materials is essential in designing spintronics devices. One method for magnetic switching is through strain. In VO2 on TiO2 thin films, while VO2 remains rutile across the metal-insulator transition, the in-plane lattice area expands going from a low-temperature insulating phase to a high-temperature conducting phase. In a VO2/TbFeCo bilayer, the expansion of the VO2 lattice area exerts tension on the amorphous TbFeCo layer. Through the strain effect, magnetic properties, including the magnetic anisotropy and magnetization, of TbFeCo can be changed. In this work, the changes in magnetic properties of TbFeCo on VO2/TiO2(011) are demonstrated using anomalous Hall effect measurements. Across the metal-insulator transition, TbFeCo loses perpendicular magnetic anisotropy, and the magnetization in TbFeCo turns from out-of-plane to in-plane. Using atomistic simulations, we confirm these tunable magnetic properties originating from the metal-insulator transition of VO2. This study provides the groundwork for controlling magnetic properties through a phase transition. |
