Giant negative magnetoresistance in Manganese-substituted Zinc Oxide

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 demonstr...

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Detalles Bibliográficos
Autores principales: Wang, X. L., Shao, Q., Zhuravlyova, A., He, M., Yi, Y., Lortz, R., Wang, J. N., Ruotolo, A.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2015
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4363826/
https://www.ncbi.nlm.nih.gov/pubmed/25783664
http://dx.doi.org/10.1038/srep09221
Descripción
Sumario: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.

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