The role of orbital ordering in the tetragonal-to-cubic phase transition in CuCr2O4

Kennedy BJ; Zhou QD

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The role of orbital ordering in the tetragonal-to-cubic phase transition in CuCr2O4

机译：轨道有序在CuCr2O4的四方相到立方相变中的作用

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Copper(II) chromite (CuCr2O4) undergoes a first-order structural transition from a tetragonal distorted spinel structure in spacegroup (14(1)/amd) to a cubic spinel structure in Fd (3) over barm, near 600 degrees C. The transition has been followed using synchrotron X-ray powder diffraction between room temperature and 750 degrees C. The structure changes as a consequence of a transition from an orbitally ordered to orbital disordered state associated with a Jahn-Teller-type distortion of the CuO4 tetrahedron. The orbital melting results in a small increase in cell volume.

机译：亚铬酸铜（CuCr2O4）在空间温度接近600摄氏度时经历了从空间群中的四方扭曲尖晶石结构（14（1）/ amd）到Fd（3）中的立方尖晶石结构的一级结构转变。在室温和750摄氏度之间使用同步加速器X射线粉末衍射进行了跃迁。结构的改变是由于与CuO4四面体的Jahn-Teller型畸变相关的从轨道有序态到轨道无序态转变的结果。轨道融化导致细胞体积的少量增加。

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《Journal of Solid State Chemistry》 |2008年第9期|共4页
作者
Kennedy BJ; Zhou QD;
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正文语种 eng
中图分类物理化学（理论化学）、化学物理学;
关键词
orbital order; Jahn-Teller distortion; phase transition; spinel;

机译：轨道次序;Jahn-Teller畸变;相变;尖晶石;

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1. The role of orbital ordering in the tetragonal-to-cubic phase transition in CuCr2O4 [J] . Kennedy BJ, Zhou QD Journal of Solid State Chemistry . 2008,第9期

机译：轨道有序在CuCr2O4的四方相到立方相变中的作用
2. Charge Transport in MAPbI(3) Pellets across the Tetragonal-to-Cubic Phase Transition: The Role of Grain Boundaries from Structural, Electrical, and Optical Characterizations [J] . Sombrio G., Zhang Z., Bonadio A., The journal of physical chemistry, C. Nanomaterials and interfaces . 2020,第20期

机译：跨越四方阶段过渡的MAPBI（3）颗粒中的电荷运输：晶界从结构，电气和光学表征的作用
3. Cooperative Jahn–Teller effect and the role of strain in the tetragonal-to-cubic phase transition in MgxCu1 − xCr2O4 [J] . Carpenter M.A., Giannini M., Tarantino S. C., IUCrJ . 2016,第5期

机译：协同Jahn–Teller效应和应变在MgxCu1ahn- xCr2O4的四方相-立方相变中的作用
4. UNDER-COORDINATED SURFACE Al~(3+) IONS IN γ- Al2O3: THEIR ROLE IN ANCHORING AND STABILIZATION OF CATALYTICALLY ACTIVE PHASES, AND IN THE γ-to-θ PHASE TRANSITION [C] . Ja Hun Kwak, Donghai Mei, Charles H.F. Peden ACS National Meeting . 2012

机译：γ-Al2O3中的欠配位表面Al〜（3+）离子：它们在锚固和稳定化催化活性阶段的作用，以及在γ到θ相位过渡中
5. ANOMALOUS TRANSPORT PROPERTIES OF BETA'-PHASE 3D ORBITAL TRANSITION-METALALLOYS [D] . AOKI, TERUAKI -1

机译：β相3D轨道过渡金属合金的异常输运性质
6. Cooperative Jahn–Teller effect and the role of strain in the tetragonal-to-cubic phase transition in MgxCu1 − xCr2O4 [O] . Serena C. Tarantino, Mattia Giannini, Michael A. Carpenter, 2016

机译：协同Jahn–Teller效应和应变在MgxCu1ahn- xCr2O4的四方-立方相变中的作用
7. Cooperative Jahn–Teller effect and the role of strain in the tetragonal-to-cubic phase transition in MgxCu1 − xCr2O4 [O] . Serena C. Tarantino, Mattia Giannini, Michael A. Carpenter, 2016

机译：协同Jahn-Teller效应和应变在mgxCu1 - xCr2O4中四方 - 立方相变中的作用
8. Neoclassical Fluxes in a Tokamak and the Role of Ion Orbit Loss in the L-H211 Transition [R] . Kiviniemi, T. 1998

机译：托卡马克中的新古典通量及L-H211跃迁中离子轨道损失的作用

The role of orbital ordering in the tetragonal-to-cubic phase transition in CuCr2O4

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