Strain-dependent magnetic phase diagram of epitaxial La0.67Sr0.33MnO3 thin films

Effects of lattice strain on magnetic behavior of epitaxial ${\mathrm{La}}_{\text{0.67}}{\mathrm{Sr}}_{\text{0.33}}{\mathrm{MnO}}_3$ thin films grown by 90° off-axis sputtering have been studied. The size of epitaxial strain was varied using four different substrates, i.e., (001) ${\mathrm{LaAlO}}_3,$ (001) ${\mathrm{SrTiO}}_3,$ (001) ${\mathrm{La}}_{\text{0.3}}{\mathrm{Sr}}_{\text{0.7}}{\mathrm{Al}}_{\text{0.65}}{\mathrm{Ta}}_{\text{0.35}}{\mathrm{O}}_9,$ and (110) ${\mathrm{NdGaO}}_3.$ The observed magnetism of coherent epitaxial films grown on these substrates, particularly anisotropy and Curie temperature, exhibit strong correlations with lattice strains. Spin reorientation transitions have been observed. The dependence of Curie temperature on the bulk and Jahn–Teller strains has been determined.