کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8000850 | 1516276 | 2014 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Electrical, thermal and magnetic properties of Bi doped La0.7âxBixSr0.3MnO3 manganites
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Electrical, thermal and magnetic properties of Bi doped La0.7âxBixSr0.3MnO3 manganites Electrical, thermal and magnetic properties of Bi doped La0.7âxBixSr0.3MnO3 manganites](/preview/png/8000850.png)
چکیده انگلیسی
We report detailed electrical, magnetic and thermoelectric studies on Bi-doped L0.7âxBixSr0.3MnO3 (0 ⩽ x ⩽ 0.25) manganites. The XRD patterns and Rietveld analysis show that the studied materials are single phased. All the compounds, exhibit the expected metal-insulator transition and a decrease in the characteristic metal-insulator transition temperature (TMI) is observed to decrease with increase in Bi-content. Low temperature resistivity data indicates that grain boundaries and electron-electron scattering processes contribute vital role in the conduction process. Magnetic studies also show that the Curie temperature TC is found to decrease with Bi-content. It is observed that MZFC and MFC curves become more manifested as Bi-content is increased which indicates an increase in magnetic frustration arising due to bending of Mn-O-Mn bond. High temperature analysis on the electrical resistivity and thermoelectric power data indicates that small polaron hopping (SPH) model is valid for all the samples.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 617, 25 December 2014, Pages 345-351
Journal: Journal of Alloys and Compounds - Volume 617, 25 December 2014, Pages 345-351
نویسندگان
Mamatha D. Daivajna, Ashok Rao, G.S. Okram,