2015/01/07 by Tapas Samanta, Samanta, Tapas, Daniel L. Lepkowski +24
Materials Science · Physics and Astronomy · #FOS: Physical sciences #Magnetic Properties of Alloys #Magnetic and transport properties of perovskites and related materials #Materials Science (cond-mat.mtrl-sci) #Rare-earth and actinide compounds
paper · pdf · doi:10.48550/arxiv.1501.01659
openalex publication_date 2015/01/07 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
The isostructural alloying of two compounds with extremely different magnetic and thermo-structural properties has resulted in a new system, (MnNiSi)1-x(FeCoGe)x, that exhibits extraordinary magnetocaloric properties with an acute sensitivity to applied hydrostatic pressure (P). Application of hydrostatic pressure shifts the first-order phase transition to lower temperature (Δ T=-41 K with P=3.43 kbar) but preserves the giant value of isothermal entropy change (-ΔSmax=143.7 J/kg K for a field change of ΔB=5 T at atmospheric pressure). Together with the magnetic field, this pressure-induced temperature shift can be used to significantly increase the effective relative cooling power.