Giant field-induced adiabatic temperature changes in In-based off-stoichiometric Heusler alloys
- Southern Illinois Univ., Carbondale, IL (United States). Dept. of Physics
- Lomonosov Moscow State Univ., Moscow (Russian Federation). Faculty of Physics
- Louisiana State Univ., Baton Rouge, LA (United States). Dept. of Physics and Astronomy
In this paper, direct measurements of the adiabatic temperature change (ΔTAD) of Ni50Mn35In14.5B0.5 have been done using an adiabatic magnetocalorimeter in a temperature range of 250–350 K, and with magnetic field changes up to ΔH = 1.8 T. The initial susceptibility in the low magnetic field region drastically increases with temperature starting at about 300 K. Magnetocaloric effects parameters, adiabatic temperature changes, and magnetic entropy changes were found to be a linear function of H2/3 in the vicinity of the second order transitions (SOT), whereas the first order transitions do not obey the H2/3 law due to the discontinuity of the transition. The relative cooling power based on the adiabatic temperature change for a magnetic field change of 1.8 T has been estimated. Maximum values of ΔTAD = -2.6 K and 1.7 K were observed at the magnetostructural transition (MST) and SOT for ΔH = 1.8 T, respectively. Finally, the observed ΔTAD at the MST exceeds the ΔTAD for Ni50Mn35In14X with X = In, Al, and Ge by more than 20% and is larger than the Gd based Heusler alloys.
- Research Organization:
- Southern Illinois Univ., Carbondale, IL (United States); Louisiana State Univ., Baton Rouge, LA (United States); Moscow State Univ., Moscow (Russian Federation)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); Russian Foundation for Basic Research
- Grant/Contract Number:
- FG02-06ER46291; FG02-13ER46946; 15-02-01976
- OSTI ID:
- 1465334
- Alternate ID(s):
- OSTI ID: 1361802
- Journal Information:
- Journal of Applied Physics, Vol. 121, Issue 13; ISSN 0021-8979
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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journal | October 2018 |
Magnetostructural transitions and magnetocaloric effects in Ni 50 Mn 35 In 14.25 B 0.75 ribbons
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journal | May 2018 |
Magnetocaloric effect in W-doped Ni–Mn–Sn alloy probed by direct and indirect measurements
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journal | March 2019 |
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