کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1671006 | 1008908 | 2010 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effects of annealing time on the structural and magnetic properties of L10 FePt thin films
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فناوری نانو (نانو تکنولوژی)
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چکیده انگلیسی
Thermal annealing of [Fe 1.65Â nm/Pt 1.84Â nm]50 multilayers at 673Â K for various annealing times between 60 and 12000Â s leads to the direct formation of the fully ordered L10 FePt phase with (111) texture. The average grain sizes, determined from X-ray diffraction size-strain analysis, are smaller than the critical size for multi-domain FePt particles, suggesting the presence of single-domain (SD) grains. The coercivity increases with annealing time and increasing grain size and reaches values of about 955Â kA/m. The remanence values are typical for randomly oriented weakly-interacting particles. A decrease of the remanence with annealing time suggests a decrease of the intergrain exchange interactions with annealing time. Analysis of minor loops and the initial magnetization curves shows the presence of a broad distribution of critical fields, which the individual SD particles have to overcome for the magnetization reversal.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Thin Solid Films - Volume 518, Issue 17, 30 June 2010, Pages 4977-4985
Journal: Thin Solid Films - Volume 518, Issue 17, 30 June 2010, Pages 4977-4985
نویسندگان
N. Zotov, R. Hiergeist, A. Savan, A. Ludwig,