کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8152658 | 1524756 | 2018 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Structural, optical, dielectric and magnetic properties of Bi1âxLaxFeO3 nanoparticles
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
In this work, the structural, optical, dielectric and magnetic properties of Bi1âxLaxFeO3 nanoparticles (xâ¯=â¯0.50 and 0.75) have been investigated at room temperature. Structural analysis indicated the coexistence of orthorhombic (Pbnm) and rhombohedral (R3c) phases. UV-visible absorption spectra of the samples exhibit two doubly degenerate d-d transitions and three charge transfer transitions. Using diffused reflectance UV-Vis spectra, the direct and indirect band gaps of the samples decreases with increasing La content. The dielectric constant (ε) of the samples in the microwave region exhibited an anomalous phenomenon at room temperature. Magnetic hysteresis loops (MâH) of the samples exhibit weak ferromagnetism and an antiferromagnetic order. Additionally, the exchange bias effect was observed in these samples at room temperature. These results demonstrate that the method presented may be considered an effective way to improve the magnetic and optical properties of Bi1âxLaxFeO3.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetism and Magnetic Materials - Volume 465, 1 November 2018, Pages 309-315
Journal: Journal of Magnetism and Magnetic Materials - Volume 465, 1 November 2018, Pages 309-315
نویسندگان
E.K. Abdel-Khalek, Islam Ibrahim, Tarek M. Salama, Ahmed M. Elseman, Mohamed Mokhtar Mohamed,