کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1800213 1024518 2012 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Investigation of induced parallel magnetic anisotropy at low deposition temperature in Ba-hexaferrites thin films
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
Investigation of induced parallel magnetic anisotropy at low deposition temperature in Ba-hexaferrites thin films
چکیده انگلیسی

In this paper we present the effect of low substrate temperature on structural, morphological, magnetic and optical properties of Ba-hexaferrite thin films. Films were deposited on single crystal Silicon (1 0 0) substrate employing the Pulsed Laser Deposition (PLD) technique. The structural, morphological, magnetic and optical properties are found to be strongly dependent on substrate temperature. The low substrate temperatures (room temperature to 200 °C) restrict the formation of larger grains. For the higher substrate temperature i.e., 400 °C, the grain size of the deposited thin film are much larger. The film grown at low substrate temperature do not show any anisotropy. As the substrate temperature is increased, the easy axis of the films alinged itself in the direction parallel to the film plane whereas the hard axis remained in the perpendicular direction. The higher substrate temperature caused the uniaxial magnetic anisotropy, which is very important in magnetic recording devices. The saturation magnetization and optical band gap energy values of 62 emu/cc and 1.75 eV, respectively, were achieved for the film of thickness 500 nm deposited at 400 °C. Higher values of coercivity, squareness and films thickness are associated with the growth of larger grains at higher substrate temperature.

▸ Effect of low substrate temperature <500 °C is studied in this project. ▸ Crystal structure, surface morphology, magnetic and optical properties never been discussed before at low substrate temperature. ▸ Parallel magnetic anisotropy is induced at low substrate temperature.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetism and Magnetic Materials - Volume 324, Issue 5, March 2012, Pages 711–716
نویسندگان
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