NdAlO3-EuAlO3体系中浓度和温度驱动的相变

2012 IEEE International Conference on Oxide Materials for Electronic Engineering (OMEE) Pub Date : 2012-09-01 DOI:10.1109/OMEE.2012.6464822

N. Ohon, A. Pashuk, S. Hoffmann, L. Vasylechko

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引用次数: 0

摘要

在整个浓度范围内研究了NdAlO3-EuAlO3体系的相和结构行为。根据x的不同，室温下存在两种不同的Nd1−xEuxAlO3固溶体，一种为菱形对称(x≤0.15)，另一种为正交对称(x≥0.25)。在x≈0.20处发生向形态转变，观察到两相共存。从原位高温x射线同步加速器粉末衍射和热分析数据中，发现Nd0.6Eu0.4AlO3在627 K时存在一阶结构相变Pbnm↔r3c。

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Concentration and temperature-driven phase transitions in the NdAlO3-EuAlO3 system

Phase and structural behaviour in the NdAlO3-EuAlO3 system has been studied in a whole concentration range. Depending on x two kinds of solid solutions Nd1−xEuxAlO3 one with rhombohedral (x ≤ 0.15) and one with orthorhombic (x ≥ 0.25) symmetry exist at room temperature. A morphotropic phase transition occurs at x ≈ 0.20, where the co-existence of both phases was observed. First-order structural phase transition Pbnm↔R 3 c has been detected in Nd0.6Eu0.4AlO3 at 627 K both from in situ high-temperature X-ray synchrotron powder diffraction and thermal analysis data.

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2012 IEEE International Conference on Oxide Materials for Electronic Engineering (OMEE)

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