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Tuning nature and temperature of structural and magnetic phase transitions of Mn3Cu1-yMyN1-xCx (M=Ag, Ni)

MPG-Autoren
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Born,  N.-O.
Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Caron,  L.
Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Felser,  C.
Claudia Felser, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Zitation

Born, N.-O., Caron, L., Seeler, E., & Felser, C. (2019). Tuning nature and temperature of structural and magnetic phase transitions of Mn3Cu1-yMyN1-xCx (M=Ag, Ni). Journal of Alloys and Compounds, 793, 185-190. doi:10.1016/j.jallcom.2019.04.160.


Zitierlink: https://hdl.handle.net/21.11116/0000-0003-B30C-6
Zusammenfassung
Antiperovskite materials based on Mn3CuN with Cu partially replaced by Ag or Ni and simultaneous substitution of N by C were synthesized and their magneto-structural transition was studied. By replacing Cu partially with Ag or Ni, Curie temperatures increase, the magnetostructural transition becomes isosymmetric and presents a more second order character. Simultaneous replacement of N by C reverses this trend as the Curie temperature decreases with increasing Ag/Ni content while the structural transition remains non-isosymmetric. Additionally, moderate magnetocaloric effects with magnetic entropy changes around 6 J/Kkg in the range of 130-150 K at a 2 T field change are observed. Finally, the influence of the change in number of valence electrons and cell size by substitution on the transition is discussed. (C) 2019 Elsevier B.V. All rights reserved.