Giant magnetocaloric and magnetoresistance effects in ferrimagnetic Mn1.9Co0.1Sb alloy.

Magnetic and transitional behaviors are investigated in Mn_1.9Co_0.1Sb intermetallic compound. Mn₂Sb is a simple ferrimagnet with Neel temperature around 550 K. The Co-introduction results in the appearance of antiferromagnetic state, and therefore, the first-order magnetic transition occurs between antiferromagnetic and ferrimagnetic state, which can be induced by temperature/magnetic field, in Mn_1.9Co_0.1Sb alloy. Accordingly, a magnetic entropy change as high as 5 J kg^-1K^-1 and a large magnetoresistance of 46% under the field change of 10 and 50 kOe are achieved, respectively. [ABSTRACT FROM AUTHOR]