Measurements of Temperature Dependence of ⁵⁵Mn NMR Frequency in Transition-Metal Alloys with Various Compositions

Abstract

Temperature dependence of the ⁵⁵Mn nuclear resonance frequency in Fe–Co, Fe–Ni, Ni–Co and Ni–Cu alloys containing 3 at%Mn has been measured by spin echo technique over a range from 4.2 K to room temperature in zero external field, and the dependence has been studied as a function of e⁄a. Here, e is the number of electrons in host, and a is the number of host atoms. The temperature dependence in the bcc phase of 8.4≤e⁄a≤8.8, is found to be slow compared with that of spontaneous magnetization. On the other hand, the temperature dependence in the fcc phase of 8.9≤e⁄a≤10.0, is found to be rapid. In this fcc region, the deviation of the reduced frequency from the reduced magnetization at a given reduced temperature increases monotonically with decreasing e⁄a.