Библиотека института физики им. Л.В. Киренского СО РАН

Главная

Базы данных

Труды сотрудников ИФ СО РАН - результаты поиска

Вид поиска

Каталог книг и брошюр библиотеки ИФ СО РАН

Каталог журналов библиотеки ИФ СО РАН

Труды сотрудников ИФ СО РАН

Область поиска

Формат представления найденных документов:
полный	информационный	краткий

Поисковый запрос: (<.>S=ε-Fe2O3<.>)

Общее количество найденных документов : 1

    Mossbauer spectroscopy study of the superparamagnetism of ultrasmall ε-Fe2O3 nanoparticles / Y. V. Knyazev [et al.] // JETP Letters. - 2018. - Vol. 108, Is. 8. - P. 527-531, DOI 10.1134/S0021364018200092. - Cited References: 22. - This work was supported by the Russian Science Foundation (project no. 17-12-01111). . - ISSN 0021-3640. - ISSN 1090-6487
Рубрики:
High-temperature
   Particles
   ε-Fe2O3
   Phase
   Model
Аннотация: The superparamagnetism of an ensemble of ϵ-Fe2O3 nanoparticles with a mean size of 3.9 nm dispersed in a xerogel SiO2 matrix is studied by the Mössbauer spectroscopy method. It is shown that most nanoparticles at room temperature are in the superparamagnetic (unblocked) state. As the temperature decreases, the progressive blocking of the magnetic moments of the particles occurs, which is manifested in the Mössbauer spectra as the transformation of the quadrupole doublet into a Zeeman sextet. The analysis of the relative intensity of the superparamagnetic (quadrupole doublet) and magnetically split (sextets) spectral components in the range of 4–300 K provides the particle size distribution, which is in agreement with the transmission electron microscopy data. The values of the effective magnetic anisotropy constants (Keff) are determined, and the contribution of surface anisotropy (KS) is estimated for particles of various sizes. It is shown that the quantity Keff is inversely proportional to the particle size, which indicates the significant contribution of the surface to the magnetic state of the ϵ-Fe2O3 nanoparticles with the size of several nanometers.

Смотреть статью,
Scopus,
WOS,
Читать в сети ИФ

Публикация на русском языке Изучение суперпарамагнетизма ультрамалых наночастиц ε-Fe2O3 методом мессбауэровской спектроскопии [Текст] / Ю. В. Князев [и др.] // Письма в ЖЭТФ. - 2018. - Т. 108 № 7-8. - С. 558-562

Держатели документа:
Russian Acad Sci, Kirensky Inst Phys, Fed Res Ctr KSC, Siberian Branch, Krasnoyarsk 660036, Russia.
Russian Acad Sci, Boreskov Inst Catalysis, Siberian Branch, Novosibirsk 630090, Russia.

Доп.точки доступа:
Knyazev, Yu. V.; Князев, Юрий Владимирович; Balaev, D. A.; Балаев, Дмитрий Александрович; Kirillov, V. L.; Bayukov, O. A.; Баюков, Олег Артемьевич; Mart'yanov, O. N.; Russian Science Foundation [17-12-01111]
}
Найти похожие