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Thermal annealing dependence of high-frequency magnetoimpedance in amorphous and nanocrystalline FeSiBCuNb ribbonsстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
- Авторы: Hernando B., Prida V.M., Sanchez M.L., Olivera J., Garcia C., Santos J.D., Alvarez P., Sanchez Li J.L., Perov N.
- Журнал: Journal of Nanoscience and Nanotechnology
- Том: 8
- Номер: 6
- Год издания: 2008
- Издательство: American Scientific Publishers
- Местоположение издательства: United States
- Первая страница: 2873
- Последняя страница: 2882
- DOI: 10.1166/jnn.2008.008
- Аннотация: The magnetoirnpeclance (MI) effect in Fe73.5Si13.5B9Nb3Cu1 melt-spun amorphous ribbons has been studied in the frequency range (1-500 MHz). Isothermal heating treatments in a furnace have been employed to nanocrystallize the ribbons (1 h at 565 degrees C in a vacuum of 10(-3) mbar), while other samples were annealed at lower temperatures (400 and 475 degrees C during 1 h), in order to evaluate the influence of the annealing temperature on the MI effect. The high-frequency impedance was measured using a technique based on the reflection coefficient measurements of a specific transmission line by using a network analyzer. Frequency dependence of the MI ratio, Delta Z/Z, and both resistive, Delta R/R, and reactive, Delta X/X, components of magnetoirnpeclance were measured in the amorphous and annealed states, at different temperatures. A maximum value of the MI ratio of about 50% at a driving frequency of 18 MHz is obtained in the nanocrystalline (annealed at 565 degrees C) ribbon. Maxima for Delta R/R of about 81% at 85 MHz and Delta X/X around 140% at 5 MHz were also achieved. It is revealed that the microstructural evolution in the nanocrystalline sample leads to a magnetic softening, an optimum domain structure and a permeability which is sensitive to frequency and applied magnetic field, generating a large MI response.
- Добавил в систему: Перов Николай Сергеевич