Abstract
The Al2NdNi3 single-phase alloy was prepared by melting stoichiometric Al, Nd, and Ni in the nonconsumable arc furnace filled with argon and then homogenizing annealing at a high temperature. The crystal structure of Al2NdNi3 was analyzed by an X-ray powder diffraction technique, Rietveld refinement analysis, and the first-principles simulation calculation method. The results show that Al2NdNi3 crystallizes in ordered variant of CaCu5-type structure (space group P6/mmm, No. 191, hP6), and the lattice parameters of a = 5.1247 (1) Å, c = 4.0941 (1) Å, Z = 1 and Dcalc = 6.68 g/cm3. The temperature-dependent susceptibility data shows field sensitive behaviour of Al2NdNi3 with low temperature transformation of magnetic ordering below ~100 K Al2NdNi3 exhibits ferromagnetic properties at low temperatures and has a Curie temperature (Tc) of 253 K in field of 50 Oe with the saturation magnetic moment (Ms) of 0.25 μB/f.u. in field of 8 T and coercivity (Hc) of 0.16 T at 2 K. The simulation results also show that Al2NdNi3 is a ferromagnet with a spontaneous magnetic moment of 0.28 μB/f.u., and it is believed that the spontaneous magnetization of this alloy originate from the electron spin in the Nd(1a)-4f band.
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