Electric field induced phase transition in charge-ordered LuFe2O4

Changhui Li; Xiangqun Zhang; Zhaohua Cheng; Young Sun
October 2008
Applied Physics Letters;10/13/2008, Vol. 93 Issue 15, p152103
Academic Journal
The measurements of resistance under various applied voltages as well as the highly nonlinear current-voltage characteristics reveal that a small electric field is able to induce an insulating to metallic phase transition in LuFe2O4. The threshold field at which the phase transition occurs decreases exponentially with the increasing temperature. We interpret this transition as a consequence of the breakdown of the charge-ordered state triggered by applied electric field. This electrically driven phase transition results in a colossal electroresistance effect around room temperature which makes LuFe2O4 a very promising material for many applications.


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