Enhanced Magnetocaloric Properties of the (MnNi)_0.6Si_0.62(FeCo)_0.4Ge_0.38 High-Entropy Alloy Obtained by Co Substitution.

ABSTRACT: In order to improve the magnetocaloric properties of MnNiSi-based alloys, a new type of high-entropy magnetocaloric alloy was constructed. In this work, Mn_0.6Ni_1-xSi_0.62Fe_0.4Co_xGe_0.38 (x = 0.4, 0.45, and 0.5) are found to exhibit magnetostructural first-order phase transitions from high-temperature Ni₂In-type phases to low-temperature TiNiSi-type phases so that the alloys can achieve giant magnetocaloric effects. We investigate why c_hexagonal/a_hexagonal (c_hexa/a_hexa) gradually increases upon Co substitution, while phase transition temperature (T_tr) and isothermal magnetic entropy change (ΔS<

SUBMITTER: Zheng Z 

PROVIDER: S-EPMC11431282 | biostudies-literature | 2024 Sep

REPOSITORIES: biostudies-literature