Structure and properties of ternary manganese nitride Mn3CuNy thin films fabricated by facing target magnetron sputtering |
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Authors: | Yuanyuan Na Ying Sun Man Nie Jian-ping Wang |
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Affiliation: | a Center for Condensed Matter and Materials Physics, Key Laboratory of Micro-Naro Measurement, Manipulation and Physics, Beihang University, Beijing 100191, PR China b The Center of Micromagnetic and Information Technology, Electrical and Computer Engineering Department, University of Minnesota, Minneapolis 55455, USA |
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Abstract: | Deposition of Mn3CuNy thin films on single crystal Si (1 0 0) at various substrate temperatures (Tsub) by facing target magnetron sputtering is reported. The crystal structure and composition were characterized by X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The results confirmed that the crystalline antiperovskite Mn3CuNy thin film with (2 0 0) highly preferred texture had been obtained at Tsub = 180 °C. Furthermore, for the resulting Mn3CuNy thin film, it showed different properties compared with the bulk counterpart. There was a paramagnetic to ferrimagnetic transition at 225 K with decreasing temperature. The change of the lattice constant with temperature presented positive thermal expansion behavior and no structural transition was observed. The average linear thermal expansion coefficient (α) is 2.49 × 10−5 K−1 from 123 K to 298 K. More interestingly, the temperature dependence of resistivity displayed a semiconductor-like behavior, i.e. an obvious monotonous decrease of resistivity with increasing temperature. |
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Keywords: | A. Thin films B. Sputtering D. Magnetic properties D. Thermal expansion D. Electrical properties |
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