Specific heat and the influence of hydrostatic pressure on the phase transitions in Ni50Mn35In14.25B0.75

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Abstract

The magnetic properties, magnetocaloric effects, and martensitic transition in Ni50Mn35In14.25B0.75 have been investigated using specific heat and magnetic measurements as a function of hydrostatic pressure. A shift in the martensitic transition temperature (TM) toward room temperature (by 35 K to higher temperature) was observed with the application of pressure (P = 0.54 GPa). The isothermal entropy changes obtained from magnetization and heat capacity measurements were found to be in good agreement. A large inverse adiabatic temperature change (ΔTad) of 2.7 K was determined from heat capacity data at TM for a magnetic field change of 1.8 T. The density of states and the Debye temperature were found to be 4.9 states/eV/f.u. and 322 K, respectively. The magnetic entropy analysis agrees fairly well with the theoretical maximal magnetic entropy, R ln(2J + 1).

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Pandey, S., Chen, J. H., Saleheen, A. U., Dubenko, I., Aryal, A., Adams, P. W., … Ali, N. (2018). Specific heat and the influence of hydrostatic pressure on the phase transitions in Ni50Mn35In14.25B0.75. Journal of Magnetism and Magnetic Materials, 463, 19–22. https://doi.org/10.1016/j.jmmm.2018.05.029

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