Вышедшие номера
Ferromagnetic and antiferromagnetic ordering in the wurtzite-type diluted magnetic semiconductors
Kitaev Yu.E.1,2, Tronc P.2
1A.F. Ioffe Physical-Technical Institute, Russian Academy of Sciences, St. Petersburg, Russia
2LPEM, Ecole Sup`erieure de Physique et de Chimie Industrielles, Paris, France
Email: yu.kitaev@mail.ioffe.ru
Поступила в редакцию: 20 сентября 2011 г.
Выставление онлайн: 18 февраля 2012 г.

We determined the magnetic symmetry groups (Shubnikov groups) of the wurtzite-type crystals doped with magnetic atoms periodically distributed at cation sites. The magnetic groups of doped crystals with ferro- or antiferromagnetic properties arise from the P63mc (C6v4), P3m1 (C3v1), Cs3 (Cm) or C11 (P1) ordinary space groups. Those arising from the P63mc or P3m1 group can present macroscopic ferromagnetic polarization only along the wurtzite symmetry axis whereas those arising from the Cs3 (Cm) group can present ferromagnetic polarization only in the symmetry plane and those arising from the C11 (P1) group can present polarization along any direction. Actual structures do not keep in general long-range order for magnetic atom distribution but the samples with macroscopic polarization should present local symmetries close to those listed above. Therefore, orientation of easy magnetization can provide information about the most frequent local symmetry. The work was supported by the grant Egide ECO-NET 21344 WL du Minist`ere des Affaires Etrang`eres (France).