کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10710610 | 1024700 | 2005 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Micromagnetic modeling and analysis of linear array of square nanomagnets
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
We perform an analytical and a numerical micromagnetic study of the magnetostatic interactions and switching behavior in a linear array of square permalloy (Ni80Fe20) elements. The angular anisotropy in the magnetostatic energy of the array is expressed in terms of a shape anisotropy Ks arising from the square geometry of individual elements, and a “chain” anisotropy Kc due to inter-element dipolar interactions. An analytical model of Kc is introduced, which agrees closely with numerical results from the OOMMF micromagnetics package, in the limit of small element separation s. For s=5nm, the energy due to Kc far exceeds that of Ks by a factor of about 20. For larger s, the model is refined to account for the magnetostatic interaction between surface poles on neighboring elements. Based on the refined model, the analytical switching field Hsw is derived by assuming coherent rotation. It yields a close correspondence with OOMMF for s larger than s0=80nm, but significantly overestimates the numerical value for s
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetism and Magnetic Materials - Volume 294, Issue 1, June 2005, Pages 83-89
Journal: Journal of Magnetism and Magnetic Materials - Volume 294, Issue 1, June 2005, Pages 83-89
نویسندگان
Pooja Wadhwa, M.B.A. Jalil,