Title

Magnetostructural phase transitions and large magnetic entropy changes in Ag-doped Mn1-xAgxCoGe intermetallic compounds

Document Type

Article

Publication Date

3-1-2019

Abstract

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)

MRS Communications

First Page

315

Last Page

320

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