کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1798802 1524831 2015 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Thickness dependence of magnetic properties in La–Co substituted strontium hexaferrite films with perpendicular anisotropy
ترجمه فارسی عنوان
وابستگی ضخامت خواص مغناطیسی در لایه سازه فیلم های هگزافرتی استرانسیمی را با آنزیمتروپی عمود بر جای گذاشت
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
چکیده انگلیسی


• Thickness dependence in submicro-scale bulk system is investigated for La–Sr–Co–Fe–O films.
• (0 0 1) preferred orientation gradually increases until t=300 nm and then declines.
• The magnetization reversal presents different models with thickness.
• Perpendicular anisotropy energy increases to maximum value of 1.76×106 erg/cm3 at t=300 nm.
• The coercivity varying with thickness is correlated with the grain size and preferred orientation.

The thickness dependence of magnetization reversal and coercivity behavior for La–Co substituted strontium hexaferrite (Sr-M) films was investigated. It is found that perpendicular anisotropy appears only when film thickness (t) is above 110 nm. With increasing t, perpendicular anisotropy energy (Ku⊥) increases gradually to its maximum of 1.76×106 erg/cm3 at t=300 nm, but turns to decrease when t>300 nm. Moreover, when t>110 nm, those films exhibit domains pinning or Stoner–Wohlfarth reversal model, present large Ku⊥ values and a rapid increase in Hc⊥. However, while t≤110 nm, Sr-M films show nucleation model of magnetization reversal and perform low coercivity. The origin of the coercivity varying with thickness should be correlated with the grain size and preferred orientations in Sr-M films.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetism and Magnetic Materials - Volume 390, 15 September 2015, Pages 56–60
نویسندگان
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