MAGNETIZATION AND SHUBNIKOV-DE-HAAS EFFECT IN DILUTED MAGNETIC SEMICONDUCTORS (CD1-X-YZNXMNY)(3)AS-2

The results of the Shubnikov-de Haas (SdH) effect and magnetization of single crystals of (Cd1-x-yZnxMny)(3)As-2 (CZMA) are presented. Speci mens with x + y = 0.3 and y = 0.04, 0.06 and 0.08, subjected to long-t ime thermal annealing, were studied. SdH effect was investigated in fi elds B up to 11 T in the temperature range T = 4.2-20 K. Magnetization was measured at B less than or equal to 5. 5 T and 5 K less than or e qual to T less than or equal to 20 K. SdH oscillations were analyzed t aking into account (i) the anomalous magnetic field dependence of the cyclotron mass observed recently in CZMA, and (ii) influence of the s- d interaction to the effective g-factor (g(eff)) of conduction electro ns. The dependence of g(eff) on B and T was introduced in the analysis of the SdH oscillations by fitting the magnetization data with the ef fective Brillouin function. Values of the exchange-independent part of g(eff), the exchange constant in the conduction band and the spin-dep endent part of the Dingle temperature were determined. (C) 1997 Americ an Institute of Physics.