کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1802375 1024596 2008 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Thermal stability and the magnetization process in CoCrPt-SiO2 perpendicular recording media
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
Thermal stability and the magnetization process in CoCrPt-SiO2 perpendicular recording media
چکیده انگلیسی
The correspondence between the crystallographic texture and intergranular exchange coupling interactions, with the switching mechanism and the thermal response of the magnetization in CoCrPt-SiO2 perpendicular recording media was investigated. Virgin hysteresis and isothermal remanence magnetization measurements both showed a three-stage process, which was interpreted to indicate that the Stoner-Wohlfarth coherent reversal mode is the dominant switching mechanism irrespective of the texture. For media samples with similar degree of texture, improvement in exchange decoupling of the media grains caused an increase in the onset field for the virgin magnetization process. The thermal decay of the magnetization, evaluated via the field-dependent viscosity coefficient peaked near the nucleation field, and the peak value showed a strong dependence on the strength of the exchange coupling interactions. A model establishing the role of the texture and exchange interactions in perpendicular recording media is put forth.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetism and Magnetic Materials - Volume 320, Issue 22, November 2008, Pages 3041-3045
نویسندگان
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