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Shear strain in Nd0.5Ca0.5MnO3 at high pressures

Arulraj, A; Dinnebier, RE; Carlson, Stefan LU ; Hanfland, M and van Smaalen, S (2005) In Physical Review Letters 94(16).
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*similar to 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.
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review Letters
volume
94
issue
16
publisher
American Physical Society
external identifiers
  • wos:000228763800046
  • scopus:18144392736
ISSN
1079-7114
DOI
10.1103/PhysRevLett.94.165504
language
English
LU publication?
yes
id
da6914e4-05e8-43fc-9a02-494c844613a3 (old id 910864)
date added to LUP
2008-01-11 11:02:17
date last changed
2017-08-27 03:48:04
@article{da6914e4-05e8-43fc-9a02-494c844613a3,
  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*similar to 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.},
  author       = {Arulraj, A and Dinnebier, RE and Carlson, Stefan and Hanfland, M and van Smaalen, S},
  issn         = {1079-7114},
  language     = {eng},
  number       = {16},
  publisher    = {American Physical Society},
  series       = {Physical Review Letters},
  title        = {Shear strain in Nd0.5Ca0.5MnO3 at high pressures},
  url          = {http://dx.doi.org/10.1103/PhysRevLett.94.165504},
  volume       = {94},
  year         = {2005},
}