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Title: Effects of the partial substitution of Ni by Cr on the transport, magnetic, and magnetocaloric properties of Ni 50Mn 37In 13

Here, the structural, magnetic, and magnetotransport properties of Ni 50-xCr xMn 37In 13 Heusler alloys have been synthesized and investigated by x-ray diffraction (XRD), field and pressure dependent magnetization, and electrical resistivity measurements. The partial substitution of Ni by Cr in Ni 50Mn 37In 13 significantly improves the magnetocaloric effect in the vicinity of the martensitic transition (T M). This system also shows a large negative entropy change at the Curie temperature (T C), making it a candidate material for application in a refrigeration cycle that exploits both positive and negative magnetic entropy changes. The refrigeration capacity (RC) values at T M and T C increase significantly by more than 20 % with Cr substitution. The application of hydrostatic pressure increases the temperature stability of the martensitic phase in Ni 45Cr 5Mn 37In 13. The influence of Cr substitution on the transport properties of Ni 48Cr 2Mn 37In 13 is discussed. An asymmetric magnetoresistance, i.e., a spin-valve-like behavior, has been observed near T M for Ni 48Cr 2Mn 37In 13.
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  1. Southern Illinois Univ., Carbondale, IL (United States)
  2. Louisiana State Univ., Baton Rouge, LA (United States)
  3. Lomonosov Moscow State Univ., Moscow (Russian Federation)
Publication Date:
Grant/Contract Number:
FG02-06ER46291; FG02-06ER46946
Published Article
Journal Name:
AIP Advances
Additional Journal Information:
Journal Volume: 7; Journal Issue: 5; Journal ID: ISSN 2158-3226
American Institute of Physics (AIP)
Research Org:
Southern Illinois Univ., Carbondale, IL (United States)
Sponsoring Org:
Country of Publication:
United States
36 MATERIALS SCIENCE; Nickel; Curie point; Magnetic fields; Entropy; Magnetoresistance
OSTI Identifier:
Alternate Identifier(s):
OSTI ID: 1393518; OSTI ID: 1421277