\textbf{Large enhancement of magnetic anisotropy and laser induced resistive switching effect in La}$_{\mathbf{0.7}}$\textbf{Sr}$_{\mathbf{0.3}}$\textbf{MnO}$_{\mathbf{3}}$\textbf{ films due to strain from BaTiO}$_{\mathbf{3}}$\textbf{ substrates}

Multifunctional oxide materials are interesting for their fundamental physical properties and technological applications. Epitaxial films of La$_{0.7}$Sr$_{0.3}$MnO$_{3}$ (LSMO) on BaTiO$_{3}$ (BTO) show intriguing properties such as a giant magnetoelectric effect due to strain from BTO substrate. The LSMO film shows sharp jumps in magnetization M(T) and resistance R(T) at first-order structural phase transitions of BTO (T$_{R-O}$ 200K and T$_{O-T}$ 270 K) due to strain coupling from BTO. A temperature evolution of effective in-plane anisotropy field (H$_{K})$ measured using the radio-frequency transverse susceptibility (TS) shows a sharp increase in H$_{K}$ around T$_{R-O}$, which vanishes around T$_{O-T.\, }$The in-plane magnetic anisotropy plays an important role in changing the magnetic and resistive states around T$_{O-T}$. A switchable laser-induced resistive change of up to 300 {\%}, which is about 10 times greater than those of conventional oxide systems, has been achieved in LSMO films using a 0.5 W violet laser just below the T$_{O-T}$.$_{\, }$The repeatability and stability of the laser-induced resistive switching effect reveal potential applications of LSMO/BTO heterostructures in developing new type of temperature sensors and memory devices.