The Young's modulus and electrical and magnetic properties of La0.5Ca0.5−xTexMnO3

The Young's modulus and the transport and magnetic properties of polycrystalline La0.5Ca0.5−xTexMnO3 (x=0, 0.05, and 0.1) have been studied systematically. It was found that with increasing Te content, the resistivity decreases, the Curie temperature TC increases and the relative Young's modulus decreases. We suggest that Te doping destroys the charge ordering (CO) and induces the ferromagnetic (FM) metallic state accompanied by an evolution from the Q3-type distorting mode to Q2-type one. In addition, we found that the evolution from magnetic to electronic phase separation is close related to the rapid decrease in the ratio of two kinds of Jahn-Teller distortion modes Q3 and Q2, i.e., Q3/Q2.