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Critical behavior of semiconductor spin glasses (CuCr2Se4)x -(Cu0.5Me0.5Cr2Se4)_(1-x) Me = In, Ga; 0 <= x <= 0.1)статья
Информация о цитировании статьи получена из
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Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 27 мая 2015 г.
- Авторы: Koroleva L.I., Viroveth T.V.
- Журнал: Physica Status Solidi (B): Basic Research
- Том: 157
- Номер: 2
- Год издания: 1990
- Издательство: John Wiley & Sons Ltd.
- Местоположение издательства: United Kingdom
- Первая страница: 431
- Последняя страница: 442
- Аннотация: Magnetic susceptibility behaviour is studied in weak dc and ac magnetic fields in the spin glass-paramagnetism transition region of the system (CuCr2Se4)_x - (Cu0.5Meo.5Cr2Se4)_(1-x) (Me= In,Ga). The critical exponents gamma, nu and beta in the spin glasses with x = 0, 0.01 and 0.03 (Me = In) determined from the nonlinear static susceptibility kci_nl in the region of the freezing temperature Tf are in close agreement with values predicted by the mean field theory, Tf being determined by the maximum value of kci_nl. The experimental points kci_nl satisfactiry fit the scaling function in the critical range H<30 Oe and (T - Tf)/Tf < 0.4. The freezing temperature Tf' of spin glasses with 0 <= x <= 0.05 (Me = In, Ga), determined from the maximum initial susceptibility in ac field depends on the measurements frequency according to the Vogel-Fulcher law. The constant T_0 in this law is close to Tf. The fact that static scaling relation and the Vogel-Fulcher law hold for Tf' indicateds that spin glass-paramagnetism phase transition occurs in the spin glasses concerned.
- Добавил в систему: Королёва Людмила Ивановна