Abstract
The thin film of heat-sensitive materials has been widely concerned with the current trend of miniaturization and integration of sensors. In this work, Mn1.56Co0.96Ni0.48O4 (MCNO) thin films were prepared on SiO2/Si substrates by sputtering with Mn–Co–Ni alloy target and then annealing in air at different temperatures (650–900 °C). The X-ray diffraction (XRD) and field emission scanning electron microscopy (FE-SEM) analysis indicated that the main crystalline phase of MCNO thin films was spinel crystal structure; the surface of the thin films was very dense and uniform. The electrical properties of the thin films were studied in the temperature range of–5–50 °C. The MCNO thin film with a low room temperature resistance R25 of 71.1 kΩ and a high thermosensitive constant B value of 3305 K was obtained at 750 °C. X-ray photoelectron spectroscopy (XPS) analysis showed that the concentration of Mn3+ and Mn4+ cations in MCNO thin films is the highest when annealing temperature is 750 °C. The complex impedance analysis revealed internal conduction mechanism of the MCNO thin film and the resistance of the thin film was dominated by grain boundary resistance.
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Acknowledgements
This work was supported by National Key R&D Program of China (Grant No. 2017YFB0406405) and National Natural Science Foundation of China (Grant No. 61571203).
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Li, R., Fu, Q., Zou, X. et al. Mn-Co-Ni-O thin films prepared by sputtering with alloy target. J Adv Ceram 9, 64–71 (2020). https://doi.org/10.1007/s40145-019-0348-y
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DOI: https://doi.org/10.1007/s40145-019-0348-y