Structural, magnetic and magnetocaloric properties of Ni54Mn14Ga27Fe5: the impact of annealing time

Tekgul A., Sarlar K., KÜÇÜK İ.

JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY, vol.144, no.4, pp.1109-1114, 2021 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 144 Issue: 4
  • Publication Date: 2021
  • Doi Number: 10.1007/s10973-020-09625-8
  • Journal Name: JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.1109-1114
  • Keywords: Annealing time, Heusler alloys, Magnetocaloric effect
  • Bursa Uludag University Affiliated: Yes

Abstract

The structural, magnetic and magnetocaloric properties of Ni54Mn14Ga27Fe5 Heusler alloy as a function of the annealing time have been investigated. The crystal structures have been characterized through multiphase Rietveld refinement of X-ray diffraction data. The alloys have cubic and the tetragonal structure with a mixed crystal phase at room temperature. In the magnetic measurements, the alloys exhibit the inter-martensitic and ferromagnetic-paramagnetic transition. The saturation magnetization values of the alloys decrease from 46.38 to 44.21 A m(2)kg(-1) as the annealing time is increased. The maximum magnetic entropy change is found to be as 2.8 Jkg(-1) K-1 under 2 T magnetic field.