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Phase separation in Sr doped BiMnO3 |
1. Institute of Physics， Chinese Academy of Sciences
2. Guilin University of Electronic Technology
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Abstract Phase separation in Sr doped BiMnO3 (Bi1-xSrxMnO3, x= 0.4 – 0.6) was studied by means of temperature-dependent high-resolution neutron powder diffraction (NPD), high resolution X-ray powder diffraction (XRD) and physical property measurements.All the experiments indicate that a phase separation occurs at the temperature coinciding with the reported charge ordering temperature (TCO) in the literature. Below the reported TCO, both the phases resulting from the phase separation crystallize in the orthorhombically distorted perovskite structure with space group Imma. At lower temperature, these two phases order in the CE-type antiferromagnetic structure and A-type antiferromagnetic structure, respectively. However, a scrutiny of the high-resolution NPD and XRD data at different temperatures and the electron diffraction experiment at 300 K did not manifest any evidence of a long-range charge ordering (CO) in our investigated samples, suggesting that the anomalies of physical properties such as magnetization, electric transport and lattice parameters at the TCO might be caused by the phase separation rather than by a CO transition.
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Received: 13 September 2013
Revised: 09 October 2013
Published: 31 October 2013
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| Fund: 超短强激光诱导自组织纳米周期结构超快过程的实验与机理;超快X射线光源及其应用研究;高平均功率2微米超短脉冲激光技术基础问题研究 |
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Corresponding Authors:
Guanghui Rao
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Cite this article:
Phase separation in Sr doped BiMnO3 Chin. Phys. B 0
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