Physics Commons^™

Magnetic And Magnetocaloric Properties Of Co2-Xfexvga Heusler Alloys, K. Schroeder, J. Waybright, P. Kharel, W. Zhang, S. Valloppilly, J. Herran, P. Lukashev, Y. Huh, R. Skomsk, D. J. Sellmyer

Faculty Publications

The magnetic and magnetocaloric properties of iron-substituted Co₂VGa alloys, Co_2-xFe_xVGa (x = 0, 0.1, 0.15, 0.2, 0.3), were investigated. The Fe-substituted samples, prepared by arc melting, melt spinning, and annealing, crystallized in the L2(1) Heusler structure, without any secondary phases. The Curie temperature and high-field magnetization at 50 K decreased from 345 K and 44 emu/g (1.90 mu(B)/f.u.) for Co₂VGa to 275 K and 39 emu/g (1.66 mu(B)/f.u.) for Co_1.7Fe_0.3VGa, respectively, but the maximum entropy change remained almost insensitive to Fe concentration for x 1.85Fe_0.15VGa. First-principle …