کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8152678 | 1524756 | 2018 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Influence of Al-doping on the structural, magnetic, and electrical properties of La0.8Ba0.2Mn1âxAlxO3 (0â¯â©½â¯xâ¯â©½â¯0.25) manganites
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
We have studied the effect of Al doping on structural, magnetic and electrical properties of La0.8Ba0.2Mn1-xAlxO3(0⩽x⩽0.25) manganite annealed in 750° and 1350° temperatures. Results show Tc decreases as Al ion substitution in Mn site. The magnetic susceptibility measurement shows Griffiths and spin-glass phase in aluminum-doped samples. Recently, Narreto et al., reported dynamic distortion and polaronic effects in the paramagnetic state of La0.8Ba0.2Mn1-xAlxO3 manganites. Here we completed the phase diagram and show an occurrence of the spin-glass state in this manganite. The resistivity measurement shows, TMIT (metal-insulator) transition temperatures decreases and the system become an insulator. The insulator-metal transition occurs for the undoped sample annealed at the low temperature in near 165â¯K, while this transition is weak for the undoped sample annealed at high temperature due to oxygen non-stoichiometry. Using three models VIZ., Adiabatic small polaron hoping, Variable range hopping, and Percolation model, the resistivity have been studied.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetism and Magnetic Materials - Volume 465, 1 November 2018, Pages 339-347
Journal: Journal of Magnetism and Magnetic Materials - Volume 465, 1 November 2018, Pages 339-347
نویسندگان
J. Ardashti Saleh, I. Abdolhosseini Sarsari, P. Kameli, H. Salamati,