Magnetostructural phase transitions and large magnetic entropy changes in Ag-doped Mn1-xAgxCoGe intermetallic compounds
The influence of Ag-doping on the crystallographic structure, magnetic properties, and magnetocaloric effects of Mn1-xAgxCoGe (0.01 ≤ x ≤ 0.10) is reported. A transformation of crystal structure from orthorhombic to hexagonal was observed at room temperature. Doping Ag in Mn sites results in a first-order magnetostructural transition near room temperature. A Curieerature window of 90 K was obtained between the Curie temperatures of the austenite (Ni2In-type) and martensite (TiNiSi-type) phases. Large magnetic entropy change values of ~22.0 and 9.4 J/kg/K, and refrigerant capacity of 308 and 272 J/kg, were found for x = 0.06 and 0.05, respectively, for μ0ΔH = 5 T.
Publication Source (Journal or Book title)
Aryal, A., Pandey, S., Dubenko, I., Mazumdar, D., Stadler, S., & Ali, N. (2019). Magnetostructural phase transitions and large magnetic entropy changes in Ag-doped Mn1-xAgxCoGe intermetallic compounds. MRS Communications, 9 (1), 315-320. https://doi.org/10.1557/mrc.2018.228