Pressure Dependence of the Lattice Distortion in Perovskite La0.5−xBixCa0.5MnO3 (x=0.1, 0.15, 0.2) |
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| Authors: | X. Wang Y. W. Pan Q. L. Cui J. Zhang W. Gao G. T. Zou |
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| Affiliation: | National Laboratory for Superhard Materials, Jilin University, Changchun, 130023, People's Republic of Chinaf1 |
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| Abstract: | The in situ behavior of distorted perovskite La0.5−xBixCa0.5MnO3 (x=0.1, 0.15, 0.2) under high pressure has been studied by energy-dispersive X-ray diffraction in a diamond anvil cell. An abnormal change of the 202–040 d-spacing ascribed to the disappearance of the distortion mode Q2 in the MnO6 octahedra is observed at 1.2, 1.4, and 1.6 GPa, respectively, and it results in a reduction of the Jahn–Teller distortion commonly existing in the manganites. Effect of the unique 6s2 long-pair character of the Bi3+ ion on the pressure dependence of the lattice distortion is discussed. |
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| Keywords: | energy-dispersive X-ray diffraction Jahn– Teller distortion La0.5− xBixCa0.5MnO3 manganites perovskite pressure. |
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