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Up to now, electric field induced non-linear conduction in the Pr(1-x)CaxMnO3system has been ascribed to a current-induced destabilization of the chargeordered phase. However, for x<0.25, a ferromagnetic insulator state is observedand charge-ordering is absent whatever the temperature. A systematicinvestigation of the non-linear transport in the ferromagnetic insulatorPr0.8Ca0.2MnO3 shows rather similar results to those obtained in charge orderedsystems. However, the experimental features observed in Pr0.8Ca0.2MnO3 aredistinct in that the collapse of the CO energy gap can not be invoked asusually done in the other members of the PCMO system. We proposeinterpretations in which the effectiveness of the DE is restored uponapplication of electric field.Comment: 6 pages, 5 figure

physical review. b, condensed matter

Nonlinear electrical response in a non-charge-ordered manganite:<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Pr</mml:mi></mml:mrow><mml:mrow><mml:mn>0.8</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Ca</mml:mi></mml:mrow><mml:mrow><mml:mn>0.2</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">MnO</mml:mi></…

Nonlinear electrical response in a non-charge-ordered manganite:Pr0.8Ca0.2MnO