Effect of electric current on the charge-ordered state in La5/8-yPryCa3/8MnO3 -: art. no. 054413

The effect of the electric current on the charge-ordered state in La5/8-yPryCa3/8MnO3 (y=0.35) manganite is investigated by means of in situ measurements of the temperature dependence of internal friction Q(-1)(T), Young's modulus E(T), and resistivity rho(T) as well as the magnetic property measurements. The minimum of E(T) is observed at the charge-ordered transition temperature T-co. Furthermore, with increasing the current, the minimum of E(T) shifts to lower temperature and the resistivity rho decreases. It is suggested that the formation of the charge-ordered state is accompanied by the cooperative Jahn-Teller distortions and the suppression of the Jahn-Teller distortion due to the applied currents may be responsible for the resistivity drop. Our results may be beneficial to understand the origin of the electric current effect on transport properties.