Magnetoresistive CrO2 films

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Science  28 Nov 1997:
Vol. 278, Issue 5343, pp. 1541
DOI: 10.1126/science.278.5343.1541l

Magnetoresistive materials change their resistance in response to an applied magnetic field and thus have applications in sensing and magnetic readout. Half-metallic ferromagnets are potential candidate materials, and Hwang and Cheong investigated CrO2, a material already used as a magnetic recording. Polycrystalline CrO2 films show enhanced low-field magnetoresistance after annealing, which modified the grain barriers by depositing insulating CrO3.

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