Electric Field Induced Collapse of Charge-Ordered Phase in Manganites
S. Dong, C. Zhu, Y. Wang, F. Yuan, K. F. Wang, J. -M. Liu
Abstract
The colossal electroresistance in manganites is a concomitant of the electric field induced insulator-to-metal phase transition. A phenomenological phase transition model is proposed to study this electric field induced collapse of charge-ordered phase. The hysteresis of the phase transition is well explained using the effective medium approximation. The volume fraction of metallic region at the metal-to-insulator transition point is estimated as 30%. In addition, it is found that the critical electric field to melt the charge-ordered phase will decrease with the applied magnetic field.
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