Jahn-Teller transition in La1–xSrxMnO3 in the low-doping region (0< ̴0.1)

Chatterji, T.; Ouladdiaf, B.; Mandal, P.; Bandyopadhyay, B.; Ghosh, B.

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Jahn-Teller transition in La_1–xSr_xMnO₃ in the low-doping region (0<x< ̴0.1)

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Chatterji, T.
Max Planck Institute for the Physics of Complex Systems, Max Planck Society;

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Citation

Chatterji, T., Ouladdiaf, B., Mandal, P., Bandyopadhyay, B., & Ghosh, B. (2002). Jahn-Teller transition in La_1–xSr_xMnO₃ in the low-doping region (0<x< ̴0.1). Physical Review B, 66(5): 054403. Retrieved from http://ojps.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=PRBMDO000066000005054403000001&idtype=cvips&gifs=yes&jsessionid=1065391053941901534.

Cite as: https://hdl.handle.net/11858/00-001M-0000-002B-3723-0

Abstract

We have investigated the Jahn-Teller transition in La1-xSrxMnO3 by high-temperature powder neutron diffraction in the low- doping region (0<x&LE;0.1). The Jahn-Teller transition temperature which is about T-JT&AP;750 K for stoichiometric LaMnO3 is drastically reduced on doping with Sr, becoming T- JT&AP;475 K for x=0.10. The previously identified metrically cubic orthorhombic O phase (Pmnb) for x=0 becomes clearly (also metrically) orthorhombic for small doping x=0.05 and remains so in the doping range investigated. The Jahn-Teller transition is accompanied only by the partial reduction of the distortion of the MnO6 octahedra. From the distortion of the MnO6 octahedra we have determined the orbital mixing coefficients.