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The ability to manipulate spins in magnetic materials is essential indesigning spintronics devices. One method for magnetic switching is throughstrain. In VO2 on TiO2 thin films, while VO2 remains rutile across themetal-insulator transition, the in-plane lattice area expands going from lowtemperature insulating phase to high temperature conducting phase. In aVO2/TbFeCo bilayer, the expansion of the VO2 lattice area exerts tension on theamorphous 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) aredemonstrated using anomalous Hall effect measurements. Across themetal-insulator transition, TbFeCo loses perpendicular magnetic anisotropy, andthe magnetization in TbFeCo turns from out-of-plane to in-plane. Usingatomistic simulations, we confirm these tunable magnetic properties originatingfrom the metal-insulator transition of VO2. This study provides the groundworkfor controlling magnetic properties through a phase transition.

Phase Change Induced Magnetic Switching through Metal-insulator Transition in VO2/TbFeCo Films