Tuning the magneto-elastic transition of (Mn,Fe,V)2(P,Si) alloys to low magnetic field applications
Jiawei Lai (TU Delft - RST/Fundamental Aspects of Materials and Energy)
Xinmin You (TU Delft - RST/Fundamental Aspects of Materials and Energy)
AI Dugulan (TU Delft - RID/TS/Instrumenten groep, TU Delft - RST/Fundamental Aspects of Materials and Energy)
B. Huang (TU Delft - RST/Fundamental Aspects of Materials and Energy, TU Delft - QRD/Kouwenhoven Lab)
J. Liu (TU Delft - RST/Fundamental Aspects of Materials and Energy)
M. Maschek (TU Delft - RST/Fundamental Aspects of Materials and Energy)
L van Eijck (TU Delft - RST/Neutron and Positron Methods in Materials, TU Delft - RST/Fundamental Aspects of Materials and Energy)
Niels van Dijk (TU Delft - RST/Fundamental Aspects of Materials and Energy)
EH Brück (TU Delft - RST/Fundamental Aspects of Materials and Energy)
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Abstract
The first-order magneto-elastic transition in the Mn–Fe–P–Si alloys can be tailored by vanadium substitution. Alloys with a suitable V substitution provide an excellent magnetocaloric effect with minor hysteresis in low magnetic fields up to 1.2 T. Mössbauer measurements show that the hyperfine field is reduced by V substitution. Neutron diffraction reveals that Fe is substituted by V on the 3f site and the magnetic moment on the 3f site is enhanced by the V substitution. The modified magnetic exchange field around the 3f and 3g positions in the lattice can be utilized to design suitable magnetocaloric materials that operate in low magnetic fields.
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