Electron paramagnetic resonance (EPR) and AC magnetic susceptibility are us
ed to study the magnetic properties of the compounds Cu2Cd1-xMnxGeSe4 and C
d1-xMnxIn2Te4. An empirical expression based on the relaxation time is used
to fit the experimental results of EPR, and the obtained parameters are in
good agreement with the results of AC magnetic susceptibility. (C) 2001 El
sevier Science B.V. All rights reserved.