کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1624344 1516421 2008 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Transport properties of Cs doped Pr2/3(Ba1−xCsx)1/3MnO3 manganites
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Transport properties of Cs doped Pr2/3(Ba1−xCsx)1/3MnO3 manganites
چکیده انگلیسی
Magneto-transport behaviour of Pr2/3Ba1/3MnO3 manganite (PBMO) doped with Cs at Ba-site is reported here. The observed decrease in the Curie temperature TC and the two insulator-metal like transitions (at TP1 and TP2) in PBMO with Cs doping have been discussed in the light of the decrease in the carrier concentration emanating due to the change in the Mn3+/Mn4+ ratio. While the peak magnetoresistance (MR) value at TP1 (reminiscent of the intra-granular behaviour) remains nearly invariant, the inter-granular (grain boundary) behaviour is clearly reflected through a substantial higher value of MR below TP2. The insulating behaviour above TP1 has been co-related to the decrease in the density of states at the Fermi level and is substantiated by the observed decrease in the resistivity with magnetic field. Electron-magnon scattering process has been invoked to consider the ferromagnetic metallic state below TP2.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 456, Issues 1–2, 29 May 2008, Pages 479-484
نویسندگان
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