Abstract

Magnetic field-induced magnetic and electrical transition from the antiferromagnetic nonmetal phase to the paramagnetic metal phase takes place in Ni1−xFexS (x=0, 0.12, 0.2, and 0.3). Large magnetoresistance (MR) was observed near room temperature, MR=730% for x=0.12 at 299 K in a magnetic field of 4 T. The large MR is related to the field-induced nonmetal–metal transition.

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