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Effective-medium theory for nonlinear magneto-optics in magnetic granular alloys: cubic nonlinearityстатья
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: Granovsky A.B., Kuzmichov M.V., Clerc J.P., Inoue M.
- Журнал: Journal of Magnetism and Magnetic Materials
- Том: 258
- Год издания: 2003
- Издательство: Elsevier BV
- Местоположение издательства: Netherlands
- Первая страница: 103
- Последняя страница: 105
- DOI: 10.1016/S0304-8853(02)01078-8
- Аннотация: We propose a simple effective-medium approach for calculating the effective dielectric function of a magnetic metal-insulator granular alloy in which there is a weakly nonlinear relation between electric displacement D and electric field E for both constituent materials of the form D-i = epsilon(i)((0)) E-i +chi(i)((3))\E-i\E-2(i). We assume that linear epsilon(i)((0)) and cubic nonlinear chi(i)((3)) dielectric functions are diagonal and linear with magnetization non-diagonal components. For such metal-insulator composite magneto-optical effects depend on a light intensity and the effective cubic dielectric function Z(eff)((3)) can be significantly greater (up to 10(3) times) than that for constituent materials. The calculation scheme is based on the Bergman and Stroud-Hui theory of nonlinear optical properties of granular matter. The giant cubic magneto-optical nonlinearity is found for composites with metallic volume fraction close to the percolation threshold and at a resonance of optical conductivity. It is shown that a composite may exhibit nonlinear magneto-optics even when both constituent materials have no cubic magneto-optical nonlinearity. (C) 2002 Elsevier Science B.V. All rights reserved.
- Добавил в систему: Грановский Александр Борисович