کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5490996 | 1524789 | 2017 | 16 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of annealing in reduced oxygen pressure on the structure and magnetic properties of M-type hexaferrite bulk and film
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Effect of annealing in reduced oxygen pressure on the structure and magnetic properties of M-type hexaferrite bulk and film Effect of annealing in reduced oxygen pressure on the structure and magnetic properties of M-type hexaferrite bulk and film](/preview/png/5490996.png)
چکیده انگلیسی
The Ca-La-Co-doped M-type Sr-hexaferrite (Sr0.1Ca0.45La0.45Fe11.7Co0.3O19) decomposed into three different phases of orthorhombic, spinel, and hexagonal structures after annealing at 1200 °C in nitrogen atmosphere while the non-substituted SrFe12O19 maintained the hexagonal structure after annealing at the same condition. It is suggested that the charge-imbalance substitution of La3+/Co2+ = 1.5 induces phase instability of the M-type structure and it causes the phase transformation during the N2 annealing. In film experiment, polycrystalline Sr-hexaferrite films (SrFe12O19) have been prepared by pulsed laser deposition and post-annealing processes. When the film was annealed in vacuum at 500 °C, the magnetization value at the magnetic field H = 15 kOe increased by â¼80% and the coercivity decreased significantly without microstructural change.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetism and Magnetic Materials - Volume 432, 15 June 2017, Pages 37-41
Journal: Journal of Magnetism and Magnetic Materials - Volume 432, 15 June 2017, Pages 37-41
نویسندگان
Kyoung-Seok Moon, Dae-Jin Yang, Sang-Eui Lee, Dong Hun Kim, Young-Min Kang,