Influence of pressure on magnetization and magnetostriction jumps in the manganite (Eu1−xGdx)0.6Sr0.4MnO3(x=0,0.1)

Abstract

We have demonstrated the influence of external pressure on magnetization jump in Gd substituted Eu0.58Sr0.42MnO3. The collapse of magnetization jump of the Eu based manganite caused by the applied pressure up to 1.2 GPa is explained by a suppression of the metastable blocked state, which is inherent to the phase separated manganite system exhibiting the magnetic avalanche. On the other hand, the magnetization jump of the Gd substituted sample is enhanced under the same pressure. To further examine the nature of the magnetization jump, the influence of pressure on the isothermal magnetostriction of the parent manganite is carried out. These findings indicate the crucial role on the abrupt transition played by the frozen phase separated phase.