Magnetic properties of dilute magnetic semiconductor (CuIn)1-xMn2xS2

We have prepared samples of the dilute magnetic semiconductor (CuIn)1-xMn2xS2 (x=0.0-0.3) and performed magnetic measurement. The magnetization curves were analyzed by considering two terms: the one was the contribution of the interactive Mn ions and the other one was the contribution of the isolated Mn ions. The decrease in the second contribution with the increase in Mn concentration was attributed to the decrease in the number of the isolated Mn ions and the increase in the number of Mn ion clusters such as pairs, triangles and networks. The dependences of the inverse magnetic susceptibilities on the temperature were measured and investigated using the above two terms. The observed data were ferrimagnetic like and the introduced formula for the dependences of the data on the temperature also showed the same tendency. (author)