Microscopic State of Low Doped Manganites La1-xSrxMnO3 Probed by ESR

Ivanshin, V. A.; Eremin, M. V.; Deisenhofer, J.; von Nidda, H. A. K.; Loidl, A.; Eremina, R. M.

doi:10.1023/A:1021226603973

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Microscopic State of Low Doped Manganites La_1-xSr_xMnO₃ Probed by ESR

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Ivanshin, V. A.
Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Citation

Ivanshin, V. A., Eremin, M. V., Deisenhofer, J., von Nidda, H. A. K., Loidl, A., & Eremina, R. M. (2002). Microscopic State of Low Doped Manganites La_1-xSr_xMnO₃ Probed by ESR. Journal of Superconductivity, 15(6), 523-525. doi:10.1023/A:1021226603973.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0015-30C8-0

Abstract

The electron spin resonance (ESR) measurements were performed in single crystals of La1-xSrxMnO3 (0.05 less than or equal to x less than or equal to 0.125) in order to study the interplay of crystal field, Dzyaloshinsky-Moriya interaction, Jahn-Teller (JT) effect, and orbital order. The angular dependence of the ESR linewidth of an untwinned La0.95Sr0.05MnO3 single crystal has been analyzed in the high-temperature approximation, which takes into account the microscopic geometry of the four nonequivalent Mn positions in the orthorhombic unit cell. A strong mixing of the \3z(2) - r(2)) and \x(2) - y(2)) states for the real orbital configuration was found. Magnetic inhomogeneities observed in the ESR spectra across the composition range 0.075 less than or equal to x less than or equal to 0.125 can be attributed to the presence of ferromagnetic clusters (magnetic spin polarons) in the paramagnetic state. New polaronic models are proposed.