کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7990278 1516127 2018 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Giant damping enhancement induced by exchange coupling in Y3Fe5O12/Co2FeAl0.5Si0.5 bilayers
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Giant damping enhancement induced by exchange coupling in Y3Fe5O12/Co2FeAl0.5Si0.5 bilayers
چکیده انگلیسی
Gilbert damping enhancement induced by the spin pumping effect is investigated in Y3Fe5O12(YIG)/heavy metal bilayers. Because its spin polarization is high and Gilbert damping is low, Co2FeAl0.5Si0.5 (CFAS) is deemed a promising ferromagnetic material in spintronics devices. We studied microwave dynamic magnetizations in YIG/CFAS bilayers combined with ferromagnetic resonance measurement using a vector network analyzer to reveal a 5-fold giant damping enhancement compared with that for the YIG/Pt bilayers. This phenomenon was attributed to both the exchange coupling effect and spin pumping effect. By inserting a 10-nm Cu spacer, direct exchange coupling can be suppressed. A spin mixing conductance geff↑↓ of 7.75 × 1018m−2 generated by spin pumping was obtained. The study provides an effective approach to tailor the damping in magnetic thin films.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 767, 30 October 2018, Pages 398-402
نویسندگان
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