Giant negative magnetoresistance in Manganese-substituted Zinc Oxide.
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ABSTRACT: We report a large negative magnetoresistance in Manganese-substituted Zinc Oxide thin films. This anomalous effect was found to appear in oxygen-deficient films and to increase with the concentration of Manganese. By combining magnetoresistive measurements with magneto-photoluminescence, we demonstrate that the effect can be explained as the result of a magnetically induced transition from hopping to band conduction where the activation energy is caused by the sp-d exchange interaction.
SUBMITTER: Wang XL
PROVIDER: S-EPMC4363826 | biostudies-other | 2015
REPOSITORIES: biostudies-other
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