Magnetic Field Effects on Electrical Resistivity and Ferromagnetism in Ni₃Al Alloys

Abstract

Magnetization and electrical resistivity of chemically analyzed Ni 3 Al alloys have been measured. The sample Ni 75.07 Al 24.93 shows a ferromagnetic transition at 43.7 K. This result confirms the ferromagnetism of stoichiometric Ni 3 Al. The magnetic field effect on the electrical resistivity has been investigated from a viewpoint of quenching of spin fluctuation. The suppression of the coefficient A of the squared temperature in the resistivity has been observed for both weakly ferromagnetic and strongly paramagnetic samples. Characteristic magnetic field H 0 for the quenching of spin fluctuation was estimated from the resistivity data. The value of H 0 shows a minimum near the boundary between paramagnetic and ferromagnetic compositions.