Rhombohedral-tetragonal phase boundary with high curie temperature in (1-x)BiCoO3-xBiFeO3 solid solution
Rhombohedral-tetragonal phase boundary with high curie temperature in (1-x)BiCoO3-xBiFeO3 solid solution
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DOI：
10.1143/jjap.47.7579
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发表时间：
2008-09-01
影响因子：
1.5
通讯作者：
Shimakawa, Yuichi
中科院分区：
文献类型：
--
作者：
Azuma, Masaki;Niitaka, Seiji;Shimakawa, Yuichi
研究了固溶体BiCo1-xFexO3的晶体结构变化，确定了四面体bico3与菱形体BiFeO3的相界。在室温下，x = 0 ~ 0.6的BiCo1-xFexO3具有四边形结构，而x = 0.8 ~ 1的BiCo1-xFexO3具有菱面体结构。在x = 0.7的样品中发现单斜根2a x根2a x a相。在x = 0.8的铋基钙钛矿样品中，在700-850℃左右首次观察到四方到立方的相变。
The crystal structure change of the solid solution BiCo1-xFexO3 was investigated in order to determine the phase boundary between tetragonal BiCoO3 and rhombohedral BiFeO3. It was found that BiCo1-xFexO3 with x = 0 to 0.6 had tetragonal BiCoO3 structures, while those with x = 0.8 to 1 had rhombohedral BiFeO3 structures at room temperature. The monoclinic root 2a x root 2a x a phase was found for the x = 0.7 sample. The tetragonal-to-cubic phase transition was first observed at around 700-850 degrees C in Bi-based perovskite for the x = 0.8 sample.