Charge localization by static and dynamic distortions of the MnO6 octahedra in perovskite manganites.
We present transport and neutron-diffraction data establishing a clear link between static and dynamic distortions of the MnO6 octahedra and charge mobility in Al-xA′x MnO3 (A= La or Pr; A′ = Ca or Sr). Systematic analysis of the Mn-O bond lengths versus average A -site ionic radius indicates that i...
| Main Authors: | , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
1996
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| Summary: | We present transport and neutron-diffraction data establishing a clear link between static and dynamic distortions of the MnO6 octahedra and charge mobility in Al-xA′x MnO3 (A= La or Pr; A′ = Ca or Sr). Systematic analysis of the Mn-O bond lengths versus average A -site ionic radius indicates that increasing static coherent MnO6 distortion is associated with increasing insulating behavior and decreasing TC. Furthermore, we observed a sudden drop of the oxygen thermal parameters at TC, indicating that static incoherent and dynamic effects are also important. |
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