Magnetic and magnetocaloric properties in Cu-doped high Mn content Mn50Ni40?xCuxSn10 Heusler alloys |
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| Affiliation: | 1. College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, People''s Republic of China;2. National Laboratory of Solid State Microstructures and Key Laboratory of Nanomaterials for Jiang Su Province, Nanjing University, Nanjing 210093, People''s Republic of China;1. Institute of Materials Science, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Hanoi, Viet Nam;2. Faculty of Physics, VNU University of Science, 334 Nguyen Trai, Hanoi, Viet Nam;3. Department of Physics, Chungbuk National University, Cheongju 361-763, South Korea;1. Centre for High Pressure Research, School of Physics, Bharathidasan University, Tiruchirappalli, India;2. Department of Physics, Karpagam College of Engineering, Coimbatore 641032, India;3. Max Planck Institute for Chemical Physics of Solids, Nöthnitzer Strasse 40, D-01187 Dresden, Germany;4. Centre for High Pressure Science and Technology Advanced Research (HPSTAR), Pudong, Shanghai 201203, China;5. Advanced Magnetic Group, Defence Metallurgical Research Laboratory, Hyderabad, India;6. Magnetism Laboratory, UGC-DAE-CSR, Indore, India;1. State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, No. 30 Xueyuan Road, Haidian District, Beijing 100083, People''s Republic of China;2. Laboratoire CRISMAT, Normandie Univ, ENSICAEN, UNICAEN, CNRS, 14000 Caen, France;3. Institut Néel, Centre National de la Recherche Scientifique, 38042 Grenoble Cedex 9, France;4. School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, People''s Republic of China;5. School of Materials Science and Engineering, Northeastern University, Shenyang 110819, People''s Republic of China;6. X-ray Science Division, Argonne National Laboratory, Argonne, Illinois 60439, USA;7. Faculty of Physics and Center for Nanointegration, University of Duisburg-Essen, 47057 Duisburg, Germany;1. Institute of Metallurgy and Materials Science, Polish Academy of Sciences, 25 Reymonta Street, 30-059, Cracow, Poland;2. Faculty of Materials Science and Engineering, Warsaw University of Technology, 141 Woloska Street, 02-507, Warsaw, Poland;3. Departament de Física, Universitat de les Illes Balears, Ctra. De Valldemossa, km 7.5, E-07122, Palma de Mallorca, Spain |
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| Abstract: | The effects of Cu substitution on the phase transitions and magnetocaloric effect of Mn50Ni40?xCuxSn10 Heusler alloys were investigated. With the increase of Cu content, the martensitic transformation (MT) temperature shifts substantially towards lower temperature, while the Curie temperature of austenite remains almost unchanged. The reverse MT temperature decreases from 180 to 171 K for Mn50Ni39Cu1Sn10 alloy as the magnetic field increases from 1 to 30 kOe. Under an applied magnetic field of 30 kOe, the maximum values of magnetic field induced entropy changes are 19.6, 28.9, and 14.2 J/kg K for x = 0, 1, and 2, respectively. The effective refrigerant capacities and hysteresis losses for these alloys were discussed in this paper. |
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| Keywords: | A Magnetic intermetallics B Magnetic properties B Martensitic transformation |
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