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Shear Strain inNd0.5Ca0.5MnO3at High Pressures
Shear Strain inNd0.5Ca0.5MnO3at High Pressures
- Source :
- Physical Review Letters. 94
- Publication Year :
- 2005
- Publisher :
- American Physical Society (APS), 2005.
-
Abstract
- High-pressure x-ray powder diffraction has been measured on the half doped rare earth manganite Nd0.5Ca0.5MnO3 up to a pressure of 15 GPa. We report the presence of a quantifiable amount of shear distortion of the MnO6 octahedra in Nd0.5Ca0.5MnO3 at high pressures. The lattice strain of Nd0.5Ca0.5MnO3 is minimal at a crossover pressure of p* approximately 7 GPa, with the same lattice strain above and below this pressure achieved by shear and Jahn-Teller-type distortions, respectively. The increase in shear strain with increasing pressure provides a mechanism for the insulating behavior of manganites at high pressures that has not been considered before.
Details
- ISSN :
- 10797114 and 00319007
- Volume :
- 94
- Database :
- OpenAIRE
- Journal :
- Physical Review Letters
- Accession number :
- edsair.doi...........d2b51a1f7a500d48c8171e3b05ebe53e
- Full Text :
- https://doi.org/10.1103/physrevlett.94.165504