Small hysteresis and giant magnetocaloric effect in Nb-substituted (Mn,Fe)2(P,Si) alloys

Shuyuan Hu, Xuefei Miao, Jun Liu, Zhiqiang Ou, Mengqi Cong, Oimod Haschuluu, Yuanyuan Gong, Fengjiao Qian, Yurong You, Yujing Zhang, Feng Xu, Ekkes Brück

Research output: Contribution to journalArticleScientificpeer-review

5 Citations (Scopus)

Abstract

The influence of Nb substitution on the structure, magnetoelastic transition and magnetocaloric properties has been investigated for the Mn1.1Fe0.85-xNbxP0.43Si0.57 alloys. The substitution for Fe by merely 4.7 at.% Nb (i.e. x = 0.04) significantly diminishes the thermal hysteresis from 10 to 1 K due to the reduced structural discontinuity crossing the magnetoelastic transition. This also improves the mechanical stability. The Curie temperature of the magnetoelastic transition is lowered by approximately 11.6 K per at.% of the Nb substitution, originating from the enhanced covalent bonding that favors the paramagnetic state. The giant magnetocaloric effect is still retained in the Nb-substituted alloys.

Original languageEnglish
Article number106602
Number of pages5
JournalIntermetallics
Volume114
Early online date2019
DOIs
Publication statusPublished - Nov 2019

Keywords

  • Energy systems
  • Functional alloys
  • Magnetic properties
  • Mechanical alloying and milling
  • Microstructure
  • Phase transformation

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