MAGNETIC-SUSCEPTIBILITY OF (CD1-X-YZNYMNX)3AS2

The magnetic susceptibility of the tetragonal semimagnetic semi-conduc tor (Cd1-x-yZnyMnx)3As2 (CZMA) with various compositions has been meas ured in the temperature range 4.2-300 K. The paramagnetic part of the measured susceptibility is analysed within our generalized pair approx imation (GPA) and treating the total Mn-Mn interaction strength as a s um of superexchange and the Bloembergen-Rowland exchange. As a result, the values of the first nearest-neighbour exchange constants for both mechanisms are determined appearing to be strongly dependent on Zn co ntent. Finally, the results of our susceptibility measurements of CZMA , extended in some cases up to 370 K, are compared with those obtained recently by other authors for (Zn1-xMnx)3As2 (ZMA) and (Cd1-xMnx)3As2 (CMA) and a possible origin of the observed differences is discussed.