Epitaxial perovskite oxide thin films on Ba(Ti,Zr)O3 substrates for strain-induced electric/magnetic property changes near room temperature

We have reported the epitaxial growth and the electric/magnetic properties of SrRuO3 and (La0.67Sr0.33)MnO3 thin films on Ba(Ti0.925Zr0.075)O3 substrates. The dielectric constant and thermal expansion of Ba(Ti0.925Zr0.075)O3 exhibited hysteretic jumps at the structural transition temperatures. Near the rhombohedral to orthorhombic structural transition temperature of Ba(Ti0.925Zr0.075)O3, which occurs at ∼33 °C, we have observed a drastic jump of resistivity and magnetization of the thin films. These results suggest that epitaxial perovskite oxide thin films on Ba(Ti0.925Zr0.075)O3 substrates should be quite useful for the strain-induced changes of physical properties near room temperature.