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Title: Effect of structural disorder on the magnetocaloric properties of Ni-Mn-Sn alloy

The magnetic and magnetocaloric properties of Ni{sub 50}Mn{sub 36.5}Sn{sub 13.5} Heusler alloy has been studied by varying the duration of annealing (0, 6, 12, 18, and 24 h) at 1173 K. The atomic ordering increases, martensitic transition (MT) becomes sharper and exchange bias field increases with increasing annealing time. The sample annealed for 24 h has shown a large magnetic entropy change (ΔS{sub M}) near its MT. But, the net refrigerant capacity at the MT of 12 h annealed sample is larger than the former one. We have discussed these results in the context of structural disorder and the ferro/antiferro correlations present in these alloy systems.
Authors:
;  [1]
  1. Magnetism Laboratory, Department of Condensed Matter Physics and Material Sciences, S. N. Bose National Centre for Basic Sciences, Block-JD, Sector-III, Salt Lake, Kolkata 700098 (India)
Publication Date:
OSTI Identifier:
22280612
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 104; Journal Issue: 3; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ADIABATIC DEMAGNETIZATION; ANNEALING; ANTIFERROMAGNETISM; FERROMAGNETISM; HEUSLER ALLOYS; MAGNETIC PROPERTIES; NICKEL ALLOYS; TEMPERATURE DEPENDENCE; TIN ALLOYS