Abstract
Nanostructured colossal magnetoresistive (CMR) films of La 0.67 Ca 0.33 MnO 3 (LCMO) were deposited by using pulsed electron deposition technique on anodized aluminum oxide membranes with pores of 50 nm in diameter. The magnetic and electronic transport properties were measured on Quantum Design physics properties measurement system (PPMS) and magnetic properties measurement system (MPMS). The resistance peak temperature ( T P ) is about 165 K and the Curie temperature ( T C ) is about 260 K. Large magnetoresistance was observed near T P in these nanostructured LCMO films. Linear I-V curves at different temperatures indicate no electronic tunneling effect. The large difference between T P and T C suggests that the nature of the resistance peak is different from that of bulk samples. The physics in these nanostructured films should be interesting to explore the mechanism of CMR effect.
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