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PeriodicalsPhysics

Anomalous Structural Change of Layered Perovskite Manganites La2-2x Sr1+2xMn2O7

Aihua Wang·Tao Liu·Yang Liu·Guohui Cao·Cheng Dong·Ning Chen·Zhaosheng Feng·Yang Li
The Open Condensed Matter Physics Journal2009

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Abstract & Overview

The temperature-dependent structural changes were investigated by using the X-ray diffraction and the Extended X-ray absorption fine spectroscopy (EXAFS) for layered perovskite manganites La 2-2x Sr 1+2x Mn 2 O 7 (x=0.33 and 0.4).The anomalous changes of Mn-O bond length and Jahn-Teller (J-T) distortion of MnO 6 octahedron were observed, corresponding to ferromagnetic transition temperature (~ 120 K).Around the temperature of 2D short-range magnetic ordering (~ 235 K), there occurs an anomaly of the Jahn-Teller distortions of MnO 6 .These results indicate that magnetic properties of perovskite manganites La 2-2x Sr 1+2x Mn 2 O 7 depend heavily on their microstructure change.The orbital state occupancy is involved in the observed Mn-O bond change.

Cite this record

Aihua Wang, Tao Liu, Yang Liu, Guohui Cao, Cheng Dong, Ning Chen, et al. (2009). Anomalous Structural Change of Layered Perovskite Manganites La2-2x Sr1+2xMn2O7. The Open Condensed Matter Physics Journal, 2, 19–24. https://doi.org/10.2174/1874186x00902010019

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Wang, A., Liu, T., Liu, Y., Cao, G., Dong, C., Chen, N., Feng, Z., & Li, Y. (2009). Anomalous Structural Change of Layered Perovskite Manganites La2-2x Sr1+2xMn2O7. The Open Condensed Matter Physics Journal, 2, 19–24. https://doi.org/10.2174/1874186x00902010019
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