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Combined effect of annealing temperature and vanadium substitution for mangetocaloric Mn1.2-xVxFe0.75P0.5Si0.5 alloys

Journal Article (2019)
Author(s)

J. Lai (TU Delft - RST/Fundamental Aspects of Materials and Energy, South China University of Technology)

B. Huang (TU Delft - RST/Fundamental Aspects of Materials and Energy, South China University of Technology, TU Delft - QRD/Kouwenhoven Lab)

Xue-fei Miao (Nanjing University of Science and Technology, TU Delft - RST/Fundamental Aspects of Materials and Energy)

V.T. Nguyen (TU Delft - RST/Fundamental Aspects of Materials and Energy, Quy Nhon University)

X. You (TU Delft - RST/Fundamental Aspects of Materials and Energy)

Michael Maschek (TU Delft - RST/Fundamental Aspects of Materials and Energy)

L van Eijck (TU Delft - RST/Neutron and Positron Methods in Materials)

Dechang Zeng (South China University of Technology)

NH Dijk (TU Delft - RST/Fundamental Aspects of Materials and Energy)

E. H. Brück (TU Delft - RST/Fundamental Aspects of Materials and Energy)

Research Group
RST/Fundamental Aspects of Materials and Energy
Copyright
© 2019 J. Lai, B. Huang, X.F. Miao, V.T. Nguyên, X. You, M. Maschek, L. van Eijck, D. Zeng, N.H. van Dijk, E.H. Brück
DOI related publication
https://doi.org/10.1016/j.jallcom.2019.06.239
More Info
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Publication Year
2019
Language
English
Copyright
© 2019 J. Lai, B. Huang, X.F. Miao, V.T. Nguyên, X. You, M. Maschek, L. van Eijck, D. Zeng, N.H. van Dijk, E.H. Brück
Research Group
RST/Fundamental Aspects of Materials and Energy
Volume number
803
Pages (from-to)
671-677
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Abstract

Approaching the border of the first order transition and second order transition is significant to optimize the giant magnetocaloric materials performance. The influence of vanadium substitution in the Mn1.2-xVxFe0.75P0.5Si0.5 alloys is investigated for annealing temperatures of 1323, 1373 and 1423 K. By tuning both the annealing temperature and the V substitution simultaneously, the magnetocaloric effect can be enhanced without enlarging the thermal hysteresis near the border of the first to second order transition. Neutron diffraction measurements reveal the changes of site occupation and interatomic distances caused by varying the annealing temperature and V substitution. The properties of the alloy with x = 0.02 annealed at 1323 K is comparable to those found for the MnFe0.95P0.595Si0.33B0.075 alloy, illustrating that Mn1.2-xVxFe0.75P0.5Si0.5 alloys are excellent materials for magnetic heat-pumping near room temperature.