J. Phys. Colloques 49 (1988) C8-875-C8-876
EXCHANGE MECHANISM IN SEMIMAGNETIC SEMICONDUCTORS FROM HIGH MAGNETIC FIELD MAGNETIZATIONJ. P. Lascaray et A. Bruno
Groupe d'Etude des Semiconducteurs, USTL, Place E. Bataillon, 34060 Montepellier Cédex, France
The analysis of high magnetic field magnetization provides a direct determination of the exchange constants between Mn spins. The study of these values indicate clearly that superexchange is the dominant mechanism for wide gap SMSC, whereas one other type of exchange, probably related to the gap value, is also present in narrow gap SMSC.