Low-temperature resistivity behaviour of molybdenum–iron, niobium–iron and palladium–iron alloys

The low-temperature resistivity of transition metals containing small amounts of iron was examined. Nb- Fe alloys show no abnormal variations of resistance with temperature above the superconducting transition temperature. The Mo- Fe alloys showed negative magnetoresistivities at and below the temperature of the maximum. Very dilute Pd-Fe ( st run. Concent 0.1 at.% Fe) showed a decrease in resistivity below about 2 un. Concent 85% K but no sign of a minimum above it. This behavior suggests that the Fe atoms interact strongly enough with the neighboring palladium atoms to remove the special significance of the nearest-neighbor ion pairs that give rise in other systems to the minimum, so that the only resistivity anomaly is a decrease below the temperature of the ferromagnetic ordering.