کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8154151 | 1524773 | 2018 | 23 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Study on the domain structure and tunable spin orientation in L11-CoPt/NiFe exchange springs with Ta-spacer
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موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
In this study, we investigate the domain structure and tunable spin orientation in L11-CoPt(10 nm)/NiFe(tNiFe) with insertion of 2-nm thick Ta-spacer and by varying NiFe-layer thickness, tNiFe = 1.0, 2.5, 5.5, 7.0, 8.5 and 10 nm. The L11-CoPt layer exhibits a strong perpendicular magnetic anisotropy and NiFe holds in-plane magnetic anisotropy and both were separated by the non-magnetic Ta-spacer. Upon increasing tNiFe, the magnetic hysteresis loops become more and more tilted along with moderate decrease in both Hcâ¥, and SQR⥠values; while the estimated tilt angle magnetization (θM) values tend to increase from 0 to 60°. Interestingly, with the insertion of Ta-spacer, significant enhancement in θM (=45°) is achieved with tNiFe of â¼3 nm in the CoPt/NiFe layers - indicating that increase in tNiFe induces tilting of CoPt spins even in the presence of Ta-spacer. Magnetic force microscopy studies on the the L11-CoPt/Ta/NiFe films revealed maze-like domain patterns and their magnetic phase contrasts tend to decrease with dominant topographic features upon increasing tNiFe. The results obtained with the micro-magnetic simulation on the tilt in anisotropy axis are found to be consistent with the experimental values of θM.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetism and Magnetic Materials - Volume 448, 15 February 2018, Pages 316-321
Journal: Journal of Magnetism and Magnetic Materials - Volume 448, 15 February 2018, Pages 316-321
نویسندگان
P. Saravanan, A. Talapatra, J. Mohanty, S. Boominathasellarajan, Jen-Hwa Hsu,