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Shear Strain in Nd0.5 Ca0.5 MnO₃ at High Pressures

Title data

Arulraj, Anthony ; Dinnebier, Robert E. ; Carlson, Stefan ; Hanfland, Michael ; van Smaalen, Sander:
Shear Strain in Nd0.5 Ca0.5 MnO₃ at High Pressures.
In: Physical Review Letters. Vol. 94 (2005) Issue 16 . - p. 165504.
ISSN 1079-7114
DOI: https://doi.org/10.1103/PhysRevLett.94.165504

Official URL: Volltext

Abstract in another language

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∗∼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.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties > Faculty of Mathematics, Physics und Computer Science > Group Material Sciences > Chair Crystallography
Faculties > Faculty of Mathematics, Physics und Computer Science > Group Material Sciences > Chair Crystallography > Chair Crystallography - Univ.-Prof. Dr. Sander van Smaalen
Faculties
Faculties > Faculty of Mathematics, Physics und Computer Science
Faculties > Faculty of Mathematics, Physics und Computer Science > Group Material Sciences
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 530 Physics
Date Deposited: 16 Mar 2016 10:45
Last Modified: 16 Mar 2016 10:45
URI: https://eref.uni-bayreuth.de/id/eprint/31849