Effects of hydrostatic pressure on magnetostructural transitions and magnetocaloric properties in (MnNiSi)1-x(FeCoGe)x
The isostructural alloying of two compounds with different magnetic and thermo-structural properties has resulted in a new system, (MnNiSi)1-x(FeCoGe)x, that exhibits large magnetocaloric effects with acute sensitivity to both compositional variation and applied hydrostatic pressure. The maximum isothermal entropy change reaches a value of -ΔSmax=143.7J/kg K for a field change of ΔB=5T at atmospheric pressure. The first-order magnetostructural transition responsible for the entropy change shifts to lower temperature with applied hydrostatic pressure (∼-10K/kbar) but maintains a large value of -ΔSmax.
Publication Source (Journal or Book title)
Journal of Applied Physics
Samanta, T., Lepkowski, D., Saleheen, A., Shankar, A., Prestigiacomo, J., Dubenko, I., Quetz, A., Oswald, I., McCandless, G., Chan, J., Adams, P., Young, D., Ali, N., & Stadler, S. (2015). Effects of hydrostatic pressure on magnetostructural transitions and magnetocaloric properties in (MnNiSi)1-x(FeCoGe)x. Journal of Applied Physics, 117 (12) https://doi.org/10.1063/1.4916339