Models of amorphous Ni 1-x P x alloys (x = 0.10; 0.15; 0.20) containing 1000 atoms have been constructed by Statical Relaxation method with Pak-Doyama like pair potentials for all of the bonding. The radial distribution functions of these models are closest to experimental data. Local structure of amorphous Ni-P alloys has been analyzed by mean of coordination number distribution and cavity distribution. Calculation shows the presence of vacancy-like cavities with considerable concentration in amorphous structure. Using Monte-Carlo method and Ising model we have simulated magnetic properties of the amorphous Ni-P alloys. The Curie temperatures of these models agree well with experimental one. Calculation of local magnetization shows the existence of the microvolumes with different local magnetization in the amorphous Ni-P alloys. For the amorphous Ni-P alloys, the maximum critical phosphorus concentration for the disappearance of spontaneous magnetic order has been determined to be between 22 at. % and 25 at. %.
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