Tuneable giant magnetocaloric effect in (Mn,Fe)<sub>2</sub>(P,Si) materials by Co-B and Ni-B co-doping

Journal article (2017)

Authors

V.T. Nguyên RST/Fundamental Aspects of Materials and Energy - AS
N. van Dijk RST/Fundamental Aspects of Materials and Energy - AS
E.H. Brück RST/Fundamental Aspects of Materials and Energy - AS
Research Group
RST/Fundamental Aspects of Materials and Energy (AS) (TU Delft)
Copyright: © 2017 V.T. Nguyên, N. van Dijk, E.H. Brück
DOI: https://doi.org/10.3390/ma10010014
Magnetocaloric effect OA-Fund TU Delft Co substitution FeP Magnetic refrigeration Ni substitution
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Published Date

2017

Language

English

Faculty

Applied Sciences

Department

RST/Radiation, Science and Technology

Research Group

RST/Fundamental Aspects of Materials and Energy

Abstract

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.