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
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
Effects of annealing time on the structural and magnetic properties of L10 FePt thin films
چکیده انگلیسی
Thermal annealing of [Fe 1.65 nm/Pt 1.84 nm]50 multilayers at 673 K for various annealing times between 60 and 12000 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 955 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
نویسندگان
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