Anomalous Jahn-Teller distortions in La0.75Ca0.25MnO3 system: An X-ray absorption study
Mn K-edge X-ray absorption near edge structure (XANES) measurements have been made to study the temperature-dependent lattice effects in the La0.75Ca0.25MnO3 system. The high-resolution XANES spectra recorded with high signal-to-noise ratio have allowed us to study the temperature dependence of the...
| Main Authors: | , , , , , |
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| Format: | Conference item |
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1997
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| Summary: | Mn K-edge X-ray absorption near edge structure (XANES) measurements have been made to study the temperature-dependent lattice effects in the La0.75Ca0.25MnO3 system. The high-resolution XANES spectra recorded with high signal-to-noise ratio have allowed us to study the temperature dependence of the Jahn-Teller splitting indicated directly by the dipole forbidden pre-peaks corresponding to transition in Mn 3d states. The results show splitting of the eg state in its two orbitals (dx2-y2 and d3z2-r2). The energy splitting shows anomalous temperature dependence across the giant magnetoresistance transition temperature. © 1997 Plenum Publishing Corporation. |
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