Вид документа : Статья из журнала Шифр издания : 54/P 41 Автор(ы) : Nosov A. P., Rinkevich A. B., Vasil'ev V. G., Vladimirova E. V. Заглавие : Penetration of High-Frequency Electromagnetic Field through Bulk Samples of La1-xSrxMnO3 (0.33≤x≤0.60) Manganites Место публикации : The Physics of Metals and Metallography. - 2008. - Vol. 106, № 1. - С. 34-42: il. Примечания : Bibliogr. : p. 41-42 (26 ref.) ISSN: 0031-918X ББК : 54 Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ Ключевые слова (''Своб.индексиров.''): манганиты--электромагнитные поля Аннотация: —Penetration of radio-frequency electromagnetic field through bulk samples of La1 –xSrxMnO3(0.33≤x≤0.60) manganites has been studied in the frequency range from 20 kHz to 30 MHz at temperatures from 300 to 400 K, which includes the temperature of the magnetic phase transition of some investigated compositions. It has been shown that, in spite of the differences in the static properties, the dynamic properties of the investigated compositions of these manganites are similar; the differences are mainly pronounced at frequencies higher than 1 MHz. In the ferromagnetic range, significant changes in the transmission coeffiicient have been observed for all compositions upon magnetization. The magnitudes of the initial dynamic magnetic permeability have been estimated. The changes in the transmission coefficient in the ferromagnetic region are mainly caused by changes in the dynamic magnetic permeability rather than by agnetoresistance. It is shown that in the paramagnetic temperature range the magnitude of the dynamic reversible permeability exceeds unity for all compositions, which supports the assumption on the retention of local magnetic ordering Доп.точки доступа: Nosov, A. P.; Rinkevich, A. B.; Vasil'ev, V. G.; Васильев Виктор Георгиевич; Vladimirova, E. V.; Владимирова Елена Владимировна