Magnetic properties of Heusler alloy Rh2NiGe

Rh2NiGe crystallizes in Heusler L21 structure. Precise magnetization measurements have been made on Rh2NiGe. The spontaneous magnetic moment at 4.2 K and the Curie temperature TC are 0.57μB/f.u. and 113 K, respectively. Below 30 K the decrease in the square of the spontaneous magnetization σs(T)2 is proportional to T2. However, over a temperature range from 89 K to the Curie temperature the decrease in σs(T)2 is proportiona to T4/3. The obtained results are analyzed using spin fluctuation theory.