Magnetic Properties of the Heusler Alloy Mn2VAl

NMR and magnetization were measured at 4.2 K for Mn 2 VAl with the L2 1 structure. The 27 Al, 51 V and 55 Mn NMR signals were observed by the spin echo technique in zero external field at 28.2, 71.5 and 104.2 MHZ which correspond to the hyperfine fields of -25.4, -63.9 and -98.7 kOe, respectively. The saturation magnetization was determined to be 56.8 emu/g and the high-field susceptibility between 20 and 80 kOe to be 1.38 ±0.24 ×10 -6 emu/g. From magnetic field dependence of the NMR frequencies and the high-field susceptibility, it was concluded that Mn 2 VAl is a simple ferromagnet. The hyperfine field was discussed on the basis of the results of a band calculation.