Impact of silicon doping on the magnetocaloric effect of MnFeP0.35As0.65 powder |
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| Institution: | 1. Institute of Non-Ferrous Metals, Ul. Sowinskiego 5, 44-100 Gliwice, Poland;2. Warsaw University of Technology, Faculty of Materials Science and Engineering, Ul. Woloska 141, 02-507 Warsaw, Poland;1. Faculty of Materials Science & Chemical Engineering, and College of Information Science & Engineering, Ningbo University, Ningbo, 315211, China;2. Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China;1. Institute of Molecular Physics, Polish Academy of Sciences, M. Smoluchowskiego 17, 60-179, Poznań, Poland;2. Institute of Nanotechnology, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, D-76344, Eggenstein-Leopoldshafen, Germany;3. Karlsruhe Nano Micro Facility (KNMF), Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, D-76344, Eggenstein-Leopoldshafen, Germany;4. Joint Research Laboratory Nanomaterials (KIT and TUD) at Technische Universität Darmstadt (TUD), Jovanka-Bontschits-Str. 2, D-64287, Darmstadt, Germany;1. Faculty of Materials Science & Chemical Engineering, Ningbo University, Ningbo 315211, China;2. Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China;1. Faculty of Materials Science & Chemical Engineering, Ningbo University, Ningbo 315211, China;2. College of Materials Science & Engineering, China Jiliang University, Hangzhou 310018, China;3. Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China;1. Department of Chemistry – Ångström Laboratory, Box 538, 751 21 Uppsala, Sweden;2. Department of Engineering Sciences, Solid State Physics, Box 534, 751 21 Uppsala, Sweden |
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| Abstract: | The magnetocaloric effect in the MnFeP0.35As0.65−xSix intermetallic compounds, prepared via solid-state sintering was studied. Adiabatic temperature and magnetic entropy changes were obtained in order to characterize these compounds. The substitution of silicon for arsenic leads to a significant enhancement of the magnetocaloric effect for silicon amount x = 0.11. The adiabatic temperature change increased from 2.3 to 3.3 K for the magnetic field change from 0 to 1.7 T. This improvement has been correlated with the increase of crystalline cell volume and change of lattice constants. Additionally, the structure of pure MnFeP0.33As0.67 has been modeled in order to check the spin alignment within the framework of ferromagnetic collinear model. |
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| Keywords: | Magnetocaloric effect Crystal structure Magnetic properties MnFePAs |
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