Effect of pressure on the lattice properties in Eu0.58Sr0.42MnO3Eu0.58Sr0.42MnO3 perovskite

The thermal expansion and lattice constants of Eu0.58Sr0.42MnO3Eu0.58Sr0.42MnO3 perovskite have been measured at high pressure. It is found that an anomalous expansion due to metal–insulator transition appeared on heating in the temperature dependence of the thermal expansion and its magnitude decreases with increasing pressure. The metal–insulator transition temperature, TM-ITM-I, increases with increasing pressure. The lattice constants, a, b, and c   are found to decrease with increasing pressure but there is a large anisotropy in the lattice compression. The linear com are extracted to be 1.5, 1.9 and 0.8×10−3GPa−1 for a, b and c-axis, respectively.