کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1799084 1524837 2015 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Scaling of coercivity in a 3d random anisotropy model
ترجمه فارسی عنوان
مقیاس کوکریتیوم در یک مدل بی نظمی تصادفی سه بعدی
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
چکیده انگلیسی
The random-anisotropy Heisenberg model is numerically studied on lattices containing over ten million spins. The study is focused on hysteresis and metastability due to topological defects, and is relevant to magnetic properties of amorphous and sintered magnets. We are interested in the limit when ferromagnetic correlations extend beyond the size of the grain inside which the magnetic anisotropy axes are correlated. In that limit the coercive field computed numerically roughly scales as the fourth power of the random anisotropy strength and as the sixth power of the grain size. Theoretical arguments are presented that provide an explanation of numerical results. Our findings should be helpful for designing amorphous and nanosintered materials with desired magnetic properties.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetism and Magnetic Materials - Volume 384, 15 June 2015, Pages 181-185
نویسندگان
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