Theoretical stability,thin film synthesis and transport properties of the Mon +1GaCn MAX phase |
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| Authors: | Rahele Meshkian Arni Sigurdur Ingason Martin Dahlqvist Andrejs Petruhins Unnar B Arnalds Fridrik Magnus Jun Lu Johanna Rosen |
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| Institution: | 1. Department of Physics, Chemistry and Biology (IFM), Link?ping University, Link?ping, Sweden;2. Science Institute, University of Iceland, Reykjavik, Iceland;3. Department of Physics and Astronomy, Uppsala University, Uppsala, Sweden |
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| Abstract: | The phase stability of Mon +1GaCn has been investigated using ab‐initio calculations. The results indicate stability for the Mo2GaC phase only, with a formation enthalpy of –0.4 meV per atom. Subsequent thin film synthesis of Mo2GaC was performed through magnetron sputtering from elemental targets onto Al2O3 0001], 6H‐SiC 0001] and MgO 111] substrates within the temperature range of 500 °C and 750 °C. High structural quality films were obtained for synthesis on MgO 111] substrates at 590 ºC. Evaluation of transport properties showed a superconducting behavior with a critical temperature of approximately 7 K, reducing upon the application of an external magnetic field. The results point towards the first superconducting MAX phase in thin film form. (© 2015 WILEY‐VCH Verlag GmbH &Co. KGaA, Weinheim) |
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| Keywords: | superconducting MAX phases Mo2GaC ab‐initio calculations magnetron sputtering thin films |
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