کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9841941 1525809 2005 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Phase transition from Pnma I to Pnma II in the 57Fe-doped LaMnO3+δ compound
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
Phase transition from Pnma I to Pnma II in the 57Fe-doped LaMnO3+δ compound
چکیده انگلیسی
The structural phase transition from Pnma I to Pnma II in the 3% 57Fe-doped lanthanum manganite LaMnO3+δ has been investigated under heat treatment. It has been shown that the phase transition in the LaMnO3+δ compound goes through the formation of the intermediate phase Pnma II* under vacuum annealing at T = 650 °C (from 2 to 22 h). The transition from one phase to another, Pnma I → Pnma II* → Pnma II, occurs virtually by jump. It follows from the Mössbauer investigations that two types of environments with stronger and weaker distortion exist in the Pnma II* and Pnma II phases in contrast to Pnma I and R3¯c, in which one type of environment takes place only.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica C: Superconductivity - Volume 418, Issues 3–4, 1 February 2005, Pages 144-150
نویسندگان
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