A remarkable decrease of the structural transition temperature of MnNiSi from 1200 to transitions, leading to a large magnetocaloric effect near room temperature. Application of relatively low hydrostatic pressures (∼2.4 kbar) lead to an extraordinary enhancement of the isothermal entropy change from -ΔS=44 to 89 J/kgK at ambient and 2.4 kbar applied pressures, respectively, for a field change of ΔB=5T, and is associated with a large relative volume change of about 7% with P=2.4 kbar.
Publication Source (Journal or Book title)
Physical Review B - Condensed Matter and Materials 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). Hydrostatic pressure-induced modifications of structural transitions lead to large enhancements of magnetocaloric effects in MnNiSi-based systems. Physical Review B - Condensed Matter and Materials Physics, 91 (2) https://doi.org/10.1103/PhysRevB.91.020401