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Thermoelectric and Magnetothermoelectric Properties of In-doped Nano-ZnO Thin Films Prepared by RF Magnetron Sputtering

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Abstract

Nano In-doped ZnO (IZO) films were deposited on glass substrates by RF magnetron sputtering from a powder target (2at% In) at different substrate temperatures. The thermoelectric and magnetothermoelectric properties of the IZO films were investigated. It shows that the prepared IZO films are c-axis oriented, the grain size is about 22–29 nm, and both the thermoeletromotive force (thermo-emf) and the magneto thermo-emf change linearly with temperature difference, implying that a striking thermoelectric (Seebeck) effect and magnetothermoelectric effect can be apparently observed in IZO films. The thermo-emf is negative, the Seebeck coefficient is about −57, −32, −40 and −66 μV/K for samples deposited at the substrate temperature of room temperature, 100, 200, 300°C, respectively. The power factor is (3.11–5.89)×10−5 W/K2 m for our thin films. The absolute value of the magnetothermo-emf is smaller than the thermo-emf without a magnetic field, showing that the magnetic field has a negative effect on the Seebeck coefficient, which can be explained by the magnetoresistive effect substantially.

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Authors and Affiliations

  1. Department of Applied Physics, ChongQing University, Chongqing, 400044, China

    L. Fang, X. F. Yang, L. P. Peng, K. Zhou, F. Wu & Q. L. Huang

  2. Department of Applied Physics, Chongqing Normal University, Chongqing, 400030, China

    C. Y. Kong

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  1. L. Fang
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  2. X. F. Yang
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  3. L. P. Peng
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  4. K. Zhou
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  5. F. Wu
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  6. Q. L. Huang
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  7. C. Y. Kong
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Correspondence to L. Fang.

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Fang, L., Yang, X.F., Peng, L.P. et al. Thermoelectric and Magnetothermoelectric Properties of In-doped Nano-ZnO Thin Films Prepared by RF Magnetron Sputtering. J Supercond Nov Magn 23, 889–892 (2010). https://doi.org/10.1007/s10948-010-0706-z

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  • DOI: https://doi.org/10.1007/s10948-010-0706-z

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