Atomic diffusion in Ni–Mn mechanical alloys around Ni3Mn composition proved from magnetic measurements

Pressure effect on magnetic moments in ordered Ni3Mn and disordered Ni100−xMnxalloys:ab initiocalculation and experiment

“…is related to the four-atom consisting formula unit). Comparing our values of saturated magnetization M 0 (5K, 0) of the ordered Ni 3 Mn alloy with results of the recent study of atomic diffusion in identical NiMn alloys [7], we can estimate that the ordered phase makes of about 80% mass of our Ni 3 Mn sample only. To prepare the pure ordered Ni 3 Mn phase, temperature annealing at 693 K for at the least 500 h is a dire need [7].…”

“…Comparing our values of saturated magnetization M 0 (5K, 0) of the ordered Ni 3 Mn alloy with results of the recent study of atomic diffusion in identical NiMn alloys [7], we can estimate that the ordered phase makes of about 80% mass of our Ni 3 Mn sample only. To prepare the pure ordered Ni 3 Mn phase, temperature annealing at 693 K for at the least 500 h is a dire need [7]. The theoretical values of the total magnetic moments agree excellently with the experimental values of magnetization of the ordered Ni 3 Mn alloy in the FM state [7], as well as with the magnetization of the disordered alloys in uDLM state.…”

“…To prepare the pure ordered Ni 3 Mn phase, temperature annealing at 693 K for at the least 500 h is a dire need [7]. The theoretical values of the total magnetic moments agree excellently with the experimental values of magnetization of the ordered Ni 3 Mn alloy in the FM state [7], as well as with the magnetization of the disordered alloys in uDLM state. The lattice constants a 0 = 3.582 and 3.568 Å have been used for the calculations of moments at ambient pressure in Ni 75 Mn 25 and Ni 80 Mn 20 alloys, respectively.…”

“…The strong dependence of magnetic properties of NiMn alloys on their chemical composition and structural ordering has been studied intensively for many years [1][2][3][4][5][6][7]. The Mn-rich Ni 1−x Mn x solid solutions crystallize in the face-centered cubic (fcc) structure.…”