Abstract
The temperature- and magnetic-field-dependences of the resistance in giant magnetoresistance (GMR) (LCMO) thin films have been studied. It is found that the magnetoresistance ratio can be expressed as near the ferromagnetic transition temperature when H<3 T. The temperature-dependence of is determined by A(T) and the exponent below 60 K and above 80 K. Under certain conditions, this kind of power-law magnetic-field-dependence of in LCMO thin film is similar to that in metallic magnetic multilayer or grain-type GMR thin films.
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