Abstract
It is found that La0.7Sr0.3MnO3 crystal shows hysteretic nonlinear V-I characteristics at high currents. The authors have reproduced such a behavior by using a simple thermal equation. Utilizing magnetic field dependence of the V-I curves, magnetoresistance ratio of R(0Oe)∕R(2.8kOe)=230% is realized at room temperature in the presence of bias currents.
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