Unusual Magnetic Behavior of Disordered Ni3Mn

Abstract

Measurements were made of the magnetization of disordered Ni₃Mn for various fields between 945 and 7550 oe and at many temperatures between 1.5 and 300°K. The magnetization vs temperature curve for any given field is found to have a pronounced maximum at about 25°K and a long concave‐upward section extending from about 140°K to temperatures above 300°K. By means of a new method of analysis, the Curie point is deduced to be 132°K. An abnormally large induced magnetization, greatest at about 50°K, is also found. All the experimental results are consistent with the occurrence of a ferrimagnetic‐ferromagnetic transition at low temperatures.