ISOTROPIC MAGNETIZATION IN FESE THIN-FILMS ON GAAS SUBSTRATE

FeSe thin films are prepared on GaAs (1 0 0) substrate by a selenizati on technique. Surface images observed by scanning electron microscopy (SEM) show polycrystallinity of the films. The sample of 600 nm thickn ess consists of grains of about 300 nm in diameter with no crystal ori entation. An isotropic magnetization for both directions of in-plane a nd perpendicular to the films is obtained from a M-H curve measured by a vibrating sample magnetometer, which is consistent with the SEM obs ervation. (C) 1998 Elsevier Science B.V. All rights reserved.