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Author Faqir, H. ♦ Chiba, H. ♦ Kikuchi, M. ♦ Syono, Y. ♦ Mansori, M. ♦ Satre, P. ♦ Sebaoun, A.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword MATERIALS SCIENCE ♦ CRYSTAL STRUCTURE ♦ MAGNETIC PROPERTIES ♦ SYNTHESIS ♦ BISMUTH OXIDES ♦ MANGANESE OXIDES ♦ FERROMAGNETISM ♦ X-RAY DIFFRACTION ♦ CRYSTAL-PHASE TRANSFORMATIONS ♦ TEMPERATURE RANGE 0400-1000 K ♦ MELTING
Abstract BiMnO{sub 3} synthesized at high pressure is a triclinically distorted perovskite and a ferromagnetic with {Tc} = 108 K. High-temperature X-ray diffraction analysis, thermal analysis, thermogravimetry, and magnetic measurements were used to determine stability and the melting sequence of BiMnO{sub 3} phase in air. Structural phase transition from triclinic to tetragonal structure has been determined at 490 C in air for a polycrystalline BiMnO{sub 3} perovskite. Two phases form immediately at the decomposition temperature of 600 C, namely Bi{sub 2}O{sub 3} and Bi{sub 2}O{sub 3}{center_dot}2Mn{sub 2}O{sub 3+{delta}}. The Bi{sub 2}O{sub 3}{center_dot}2Mn{sub 2}O{sub 3+{delta}} coexists with liquid up to at least 900 C.
ISSN 00224596
Educational Use Research
Learning Resource Type Article
Publisher Date 1999-01-01
Publisher Place United States
Journal Journal of Solid State Chemistry
Volume Number 142
Issue Number 1


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