Lp. Olkhovik et al., INVESTIGATION OF THE CRITICAL (H-T)-PARAMETERS FOR THE STATE OF THE BAO-CENTER-DOT-6FE(2)O(3) NANOCRYSTAL SYSTEM, Journal of magnetism and magnetic materials, 183(1-2), 1998, pp. 181-184
The field and temperature dependences are studied on thermally demagne
tized powder samples of BaO . 6Fe(2)O(3) with randomly oriented partic
les. New aspects of magnetic behaviour of the small-particle system ha
ve been revealed. The (H-T) diagram which reflects the role of the tem
perature and field factors in the realization of three different magne
tic states, the superparamagnetic included, is obtained in the tempera
ture range of 300 K-T-c. (C) 1998 Elsevier Science B.V. All rights res
erved.