کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8157003 | 1524857 | 2014 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Enhanced magnetic properties in low doped La1-xBaxMnO3+δ (x=0, 0.1 and 0.2) nanoparticles
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موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Low doped colossal magnetoresistance La1âxBaxMnO3+δ nanoparticles are synthesized by a sol-gel method along with the parent compound LaMnO3+δ. The Reitveld refinements on the XRD patterns show that they are crystallized in structure other than their stoichiometric bulk. The crystal structure indicates excess oxygen/cationic vacancies in the compound. The magnetic measurements reveal that the ferromagnetic Curie temperature (TC) is enhanced after oxygen annealing. The observed TC is higher than that of their stoichiometric bulk compounds and the values are comparable to the reported tensile strained epitaxial thin films. The estimated Mn4+/Mn3+ ratio is found to increase in the nanocrystalline samples compared to their bulk samples annealed under the same oxygen atmosphere. The enhancement in Curie temperature could be correlated with the excess oxygen/cationic vacancies.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetism and Magnetic Materials - Volume 364, September 2014, Pages 125-128
Journal: Journal of Magnetism and Magnetic Materials - Volume 364, September 2014, Pages 125-128
نویسندگان
Rakesh Dhama, Chiranjib Nayek, Ch. Thirmal, P. Murugavel,