کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1541759 996693 2006 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Magneto-optic effects in ferromagnetic films: Implications for spin devices
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
Magneto-optic effects in ferromagnetic films: Implications for spin devices
چکیده انگلیسی
We present results on the magneto-optic properties of ferromagnetic films deposited on GaAs and SiO2 substrates. Using left- and right-circularly polarized light, we have measured the polarization-dependent photoresponse and reflectivity of Co/GaAs, Fe/GaAs and NiFe/GaAs Schottky diodes and the polarization-dependent reflection and transmission of NiFe/SiO2 and Co/SiO2 structures as a function of ferromagnetic film thickness, reported here in the range of 7.5-15 nm. Films were prepared by sputtering and molecular-beam epitaxy. Measurements were made in the presence of magnetic fields ranging from −1.2 to +1.2 T both parallel and perpendicular to the sample surface. We find maximum polarization-dependent transmission and photoresponse effects (with respect to left- versus right-circularly polarized light) of 2-4% in magnitude. Taken together the work suggests that magneto-optic effects intrinsic to the films, rather than spin injection across the ferromagnetic/semiconductor interface, are responsible for the observed phenomenology. The work has direct implications for the interpretation of results in ferromagnetic/semiconductor spintronic systems.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optics Communications - Volume 259, Issue 2, 15 March 2006, Pages 704-709
نویسندگان
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