Consequences of pressure-instigated spin crossover in RFeO3 perovskites; a volume collapse with no symmetry modification

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High-pressure X-ray diffraction, Mössbauer, and Raman studies in the antiferromagnetic insulators RFeO3 orthorhombic perovskites (R = Pr, Eu, Lu) disclose an unusual phenomena of a reversible first-order isostructural phase transition around 50 GPa concurring with an abrupt ∼ 5% volume decrease. It is shown experimentally that this transformation concurs with, and is driven by, a high-to-low-spin transition taking place in Fe3+; a manifestation of a new kind of isostructural phase transition. These studies suggest that the RFeO3 perovskite is a rather sturdy oxide-structure, maintaining its original structural symmetry beyond 125 GPa.


  • G. Kh Rozenberg
  • M. P. Pasternak
  • W. M. Xu
  • L. S. Dubrovinsky
  • S. Carlson
  • R. D. Taylor
Externa organisationer
  • Tel-Aviv University
  • University of Bayreuth
  • European Synchrotron Radiation Facility
  • Los Alamos National Laboratory
Sidor (från-till)228-234
Antal sidor7
TidskriftEurophysics Letters
Utgåva nummer2
StatusPublished - 2005 jul 15
Peer review utfördJa
Externt publiceradJa