Submillimeter wave ESR study of Cd_(1-x)Mn_xTe

摘要

Submillimeter wave ESR experiments have been performed on Cd_(1-x)Mn_xTe at x = 0.35. A crossover from the damped ESR signal to the collective spin-wave mode was found around 15 T. In addition to the host resonance, a new peak was observed for the sample doped with 0.3/100 of Fe together with 38/100 of Mn. The correlation between the host resonance and the new peak observed in the frequency-field relation indicates the existence of magnetic clusters interacting with host spins.