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Title: Magnetic and magnetocaloric properties of Gd 1 - x Y x 2 NiSi 3 compounds (x = 0.25, 0.5, 0.75)

Journal Article · · Journal of Magnetism and Magnetic Materials
ORCiD logo [1];  [2];  [2]
  1. Saha Inst. of Nuclear Physics, Bidhannagar, Kolkata (India); Ames Lab. and Iowa State Univ., Ames, IA (United States)
  2. Saha Inst. of Nuclear Physics, Bidhannagar, Kolkata (India)

Here, we report the magnetic dilution effect on the magnetic and magnetocaloric properties of Gd 1 - x Y x 2 NiSi 3 (x = 0.25, 0.5, 0.75) compounds by partial substitution of Y ions in Gd2NiSi3. The X-ray diffraction studies indicate all theses compounds form in AlB2 type hexagonal crystal structure. The dc magnetic measurements reveal the compounds undergo antiferromagnetic like phase transition below 11.5, 7.2, and 3.1 K for x = 0.25, 0.5 and 0.75 compositions, respectively. The magnetic ground state of the compounds becoming increasingly fragile with the increase in Y concentration, and results in magnetic field induced ferromagnetic transition. Such change in magnetic spin configuration is responsible for moderately large magnetic entropy change (ΔSM ~ 19.3 J/kg-K, 14.8 J/kg-K and 9.8 J/kg-K for (x = 0.25, 0.5, 0.75), respectively, for ΔH = 7T) in the cryogenic temperature region. The relative cooling power (RCP) has also been measured for all the compounds that appears to be modest (~503 J/kg for 7T magnetic field change) for x = 0.25 analogue and reduces further with magnetic dilution effect caused by Y substitution.

Research Organization:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division
Grant/Contract Number:
AC02-07CH11358
OSTI ID:
1526284
Alternate ID(s):
OSTI ID: 1636496
Report Number(s):
IS-J--9948
Journal Information:
Journal of Magnetism and Magnetic Materials, Journal Name: Journal of Magnetism and Magnetic Materials Journal Issue: C Vol. 484; ISSN 0304-8853
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English