作者:A.S. Pavlovic
DOI:10.1016/0304-8853(92)91657-f
日期:1992.2
The low-field magnetic susceptibility and the thermal expansion were measured from room temperature to 4.2 K, as well as the magnetization up to 50 kOe from about 100 to 4.2 K on a polycrystalline sample of sigma-phase CrMn3. The susceptibility results showed the existence of a weak ferromagnetic transition at T(c) = (86.2 +/- 0.3)K. The spontaneous magnetization at 4.2 K has a value of 0.256 emu/g and a high-field susceptibility of 17.2 x 10(-6) emu/g Oe. The average moment per atom is about 0.01-mu(B), while if all of the moments resided on the Mn atoms, it would be 0.013-mu(B). Since most of the average moments per atom cited for CrMn alloys are about 0.85-mu(B), it appears that the weak ferromagnetism in these alloys must be due to the canting of the moments.