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Thermal stability of locally-associated Al and In impurities in zinc oxide

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Abstract

The stability of locally-associated Al and In impurities in zinc oxide (ZnO) was investigated by means of the time-differential perturbed angular correlation (TDPAC) method with the 111Cd(←111In) probe. We found that Al and In impurities associate with each other by their thermal diffusion in air, and the association process irreversibly proceeds at high temperature. In vacuum, however, it was revealed that the rigid bonding between Al and In ions dissociates by heat treatment at temperatures higher than 873 K, and this dissociation process is enhanced with increasing annealing temperature. The contrastive atmosphere dependence of the stability of the association between Al and In in ZnO is discussed based on the variation of the TDPAC spectra against heat-treatment temperature.

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Acknowledgments

We express our gratitude to Prof. Y. Kobayashi for providing experimental apparatus for the TDPAC measurements. This work was supported in part by the Grant-in-Aid for Japan Society for the Promotion of Science (JSPS) Fellows, 255811.

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Authors and Affiliations

  1. Graduate School of Natural Science and Technology, Kanazawa University, Kakumamachi, Kanazawa, Ishikawa, 920-1192, Japan

    S. Komatsuda

  2. Institute of Science and Engineering, Kanazawa University, Kakumamachi, Kanazawa, Ishikawa, 920-1192, Japan

    W. Sato

  3. Research Reactor Institute, Kyoto University, Kumatori, Sennan, Osaka, 590-0494, Japan

    Y. Ohkubo

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  1. S. Komatsuda
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  2. W. Sato
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  3. Y. Ohkubo
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Correspondence to W. Sato.

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Komatsuda, S., Sato, W. & Ohkubo, Y. Thermal stability of locally-associated Al and In impurities in zinc oxide. J Radioanal Nucl Chem 303, 1249–1252 (2015). https://doi.org/10.1007/s10967-014-3460-z

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  • DOI: https://doi.org/10.1007/s10967-014-3460-z

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