SHUBNIKOV-DE-HAAS EFFECT IN THERMALLY ANNEALED (CD1-X-YZNXMNY)(3)AS-2

Investigations of the Shubnikov-de Haas (SdH) effect have been perform ed on single crystals of the II-V group diluted magnetic semiconductor (Cd1-x-yZnxMny)(3)As-2 with x + y = 0.3, y = 0.04, 0.06 and 0.08, sub jected to long-time thermal annealing. The presence of the first and t he second harmonics in the spectrum of SdH oscillations is established . The strong magnetic field dependence of the cyclotron mass, observed earlier in the as-grown samples, is conserved after heat treatment. T his dependence coexists with the influence of the s-d interaction to t he effective g-factor. A comparison between the properties of as-grown and annealed crystals is made. (C) 1997 Elsevier Science Ltd.