کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1803395 | 1024616 | 2006 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Heterogeneous magnetic and electronic states in Ca1âxLaxMnO3âδ (x⩽0.12) single crystals with electron doping
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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
The magnetic, transport, and optical properties of electron-doped Ca1âxLaxMnO3âδ single crystals with x⩽0.12 were studied. The magnetic measurements show that in single crystals with x=0 and 0.05 the G-type AFM phase with weak FM component is realized and in crystals with x=0.10 and 0.12 the G- and C-type AFM phases coexist. The C-type magnetic structure arises at less concentration of La than in polycrystalline samples as a result of oxygen vacancies being additional source of electrons. Under magnetic transitions in the G- and C-type phases, resistivity and magnetoresistance of the doped single crystals have anomalies. Optical absorption in IR range indicates formation of a charge gap in crystals with x=0.10 and 0.12 at appearance of the C-AFM and monoclinic phase with orbital/charge ordering. By comparing optical and transport properties, heterogeneous electronic state and its relation with heterogeneous magnetic state are shown.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetism and Magnetic Materials - Volume 300, Issue 1, May 2006, Pages e140-e143
Journal: Journal of Magnetism and Magnetic Materials - Volume 300, Issue 1, May 2006, Pages e140-e143
نویسندگان
N.N. Loshkareva, A.V. Korolyov, N.I. Solin, E.V. Mostovshchikova, Yu.P. Sukhorukov, S.V. Naumov, A.M. Balbashov,