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Lamellar phase separation and dynamic competition in La0.23Ca0.77MnO3
Release time:2022-07-06
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- Journal:
- Phys. Rev. Lett.
- Abstract:
- We report the coexistence of lamellar charge-ordered (CO) and charge-disordered (CD) domains, and their dynamical behavior, in La0.23Ca0.77MnO3. Using high-resolution transmission electron microscopy(TEM), we show that below TCD ~170 K a CD monoclinic phase forms within the established CO orthorhombic matrix. The CD phase has a sheetlike morphology, perpendicular to the q vector of the CO superlattice (a axis of the Pnma structure). For temperatures between 64 and 130 K, both the TEM and resistivity experiments show a dynamic competition between the two phases: at constant T, the CD phase slowly advances over the CO one. This slow dynamics appears to be linked to the magnetic transitions occurring in this compound, suggesting important magnetoelastic effects
- Co-author:
- Tao, J.; Niebieskikwiat D.; Salamon M. B.; Zuo J. M.
- Volume:
- 94,
- Page Number:
- 147206
- Translation or Not:
- no
- Date of Publication:
- 2005-08-06
- Links to published journals:
- https://doi.org/10.1103/PhysRevLett.94.147206
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