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Transport properties of hydrogenated ZnO microwires

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Abstract

We have studied the magnetoresistance (MR) of hydrogen plasma-treated pure ZnO wires of tens of micrometer diameter at different temperatures. A negative MR of 1% at 8 T applied field is measured for all wires at 4 K, independent of the temperature (300 K … 773 K) used during the hydrogen treatment. However, a positive MR develops, the higher the treatment temperature. The MR can be explained with a semiempirical model taking into account local magnetic moments and the s–d exchange interaction. These results together with field anisotropy in the MR indicate the appearance of magnetic order due to the hydrogen treatment in agreement with recently published reports on the influence of hydrogen in bulk ZnO single crystals. Hydrogen doping may provide a way to trigger defect-induced magnetism in small oxide structures.

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Acknowledgments

This work was supported by the Collaborative Research Center (SFB762) “Functionality of Oxide Interfaces”. We thank Dr. J. Barzola-Quiquia for technical support.

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Authors and Affiliations

  1. Division of Superconductivity and Magnetism, Institute for experimental Physics II, Fakultät für Physik und Geowissenschaften, 04103, Leipzig, Germany

    Israel Lorite & Pablo Esquinazi

  2. Dpto. de Física, FCEyT, Laboratorio de Física del Sólido, Universidad Nacional de Tucumán, 4000, Tucumán, Argentina

    Cecilia Zapata & Silvia P. Heluani

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  1. Israel Lorite
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  2. Pablo Esquinazi
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  3. Cecilia Zapata
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  4. Silvia P. Heluani
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Correspondence to Israel Lorite.

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Lorite, I., Esquinazi, P., Zapata, C. et al. Transport properties of hydrogenated ZnO microwires. Journal of Materials Research 29, 78–83 (2014). https://doi.org/10.1557/jmr.2013.219

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  • DOI: https://doi.org/10.1557/jmr.2013.219

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