کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1803807 | 1024631 | 2008 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Investigation of temperature dependence of surface anisotropy field and constant in the system of BaFe12O19 nanocrystals
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Investigation of temperature dependence of surface anisotropy field and constant in the system of BaFe12O19 nanocrystals Investigation of temperature dependence of surface anisotropy field and constant in the system of BaFe12O19 nanocrystals](/preview/png/1803807.png)
چکیده انگلیسی
We show a possibility to determine the parameters characterizing surface magnetic anisotropy of platelet BaFe12O19 nanocrystals with thickness comparable to the magnetoperturbed surface layer of high-anisotropic hexagonal crystal. Taking into account the above-mentioned specific character of the particles, we introduce the constant KS as the surface anisotropy energy per unit volume of near-surface layer. Temperature dependence of the surface anisotropy field as one of the components of effective anisotropy was corrected taking into account the thermal fluctuations. Discovered anomaly initiated calculation of the surface anisotropy constant with different approaches for two different temperature ranges. Analyzing the KS sign changes with temperature, we conclude about the transformation of surface anisotropy from plane to axis type.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetism and Magnetic Materials - Volume 320, Issue 17, September 2008, Pages 2190-2194
Journal: Journal of Magnetism and Magnetic Materials - Volume 320, Issue 17, September 2008, Pages 2190-2194
نویسندگان
L.P. Ol'khovik, Z.I. Sizova,