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

V.T. Nguyên, Niels Harmen van Dijk, Ekkes Brück

Research output: Contribution to journalArticleScientificpeer-review

19 Citations (Scopus)
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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.

Original languageEnglish
Article number14
JournalMaterials
Volume10
Issue number1
DOIs
Publication statusPublished - 2017

Keywords

  • Co substitution
  • FeP
  • Magnetic refrigeration
  • Magnetocaloric effect
  • Ni substitution
  • OA-Fund TU Delft

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