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The electroresistance(ER) of La_(0.36)Pr_(0.265)Ca_(0.375)MnO_3(LPCMO) epitaxial thin film was studied under various dc currents.The current effect was compared for the unpatterned film and patterned microbridge with a width of 50 μm.The value of ER in the unpatterned LPCMO film could reach 0.54 under a 1-mA current,which is much higher than ER under 1 mA for the patterned weak phase-separated La_(0.67)Ca_(0.33)MnO_3 and La_(0.85)Sr_(0.15)MnO_3 microbridges with 50-μm width.More interestingly,for the patterned LPCMO microbridge,the maximum of ER can reach 0.6 under a small current of 100 μ.A.The results were explained by considering the coexistence of ferromagnetic metallic phase with the charge-ordered phase,and the variation of the phase separation with electric current.
The electroresistance (ER) of La_ (0.36) Pr_ (0.265) Ca_ (0.375) MnO_3 (LPCMO) epitaxial thin film was studied under various dc currents. The current effect was compared for unpatterned film and patterned microbridge with a width of 50 μm The value of ER in the unpatterned LPCMO film could reach 0.54 under a 1-mA current, which is much higher than ER under 1 mA for the patterned weak phase-separated La_ (0.67) Ca_ (0.33) MnO_3 and La_ (0.85) Sr_ (0.15) MnO_3 microbridges with 50-μm width. Macro interestingly, for the patterned LPCMO microbridge, the maximum of ER can reach 0.6 under a small current of 100 μ.A.The results were explained by considering the coexistence of ferromagnetic metallic phase with the charge-ordered phase, and the variation of the phase separation with electric current.