Raman Scattering from Localized Magnons in Ni(2+) AND Fe(2+) Doped MnF2.

摘要

A study was made of Raman scattering at low temperatures from MnF2 doped with Ni(2+) and Fe(2+). Three temperature and polarization dependent lines have been observed for each impurity. For each dopant we have identified one line as a two magnon excitation of the impurity and some linear combination of the host spins. When corrections are made for magnon-magnon interactions, the predicted energy is in excellent agreement with the experimental results. (Author)