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Tuneable Giant Magnetocaloric Effect in (Mn,Fe)2(P,Si) Materials by Co-B and Ni-B Co-Doping

Fundamental Aspects of Materials and Energy, Department of Radiation Science and Technology, Delft University of Technology, Mekelweg 15, Delft 2629 JB, The Netherlands
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Academic Editor: Sofoklis Makridis
Materials 2017, 10(1), 14; https://doi.org/10.3390/ma10010014
Received: 25 October 2016 / Revised: 5 December 2016 / Accepted: 15 December 2016 / Published: 27 December 2016
(This article belongs to the Section Energy Materials)
The influence of Co (Ni) and B co-doping on the structural, magnetic and magnetocaloric properties of (Mn,Fe) 2 (P,Si) compounds is investigated by X-ray diffraction (XRD), differential scanning calorimetry, magnetic and direct temperature change measurements. It is found that Co (Ni) and B co-doping is an effective approach to tune both the Curie temperature and the thermal hysteresis of (Mn,Fe) 2 (P,Si) materials without losing either the giant magnetocaloric effect or the positive effect of the B substitution on the mechanical stability. An increase in B concentration leads to a rapid decrease in thermal hysteresis, while an increase in the Co or Ni concentration hardly changes the thermal hysteresis of the (Mn,Fe) 2 (P,Si) compounds. However, the Curie temperature decreases slowly as a function of the Co or Ni content, while it increases dramatically for increasing B concentration. Hence, the co-substitution of Fe and P by Co (Ni) and B, respectively, offers a new control parameter to adjust the Curie temperature and reduce the thermal hysteresis of the (Mn,Fe) 2 (P,Si) materials. View Full-Text
Keywords: magnetic refrigeration; magnetocaloric effect; Fe2P; Co substitution; Ni substitution magnetic refrigeration; magnetocaloric effect; Fe2P; Co substitution; Ni substitution
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MDPI and ACS Style

Thang, N.V.; Dijk, N.H.; Brück, E. Tuneable Giant Magnetocaloric Effect in (Mn,Fe)2(P,Si) Materials by Co-B and Ni-B Co-Doping. Materials 2017, 10, 14.

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