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

Rozenberg, G. Kh; Pasternak, M. P.; Xu, W. M.; Dubrovinsky, L. S.; Carlson, S. LU and Taylor, R. D. (2005) In Europhysics Letters 71(2). p.228-234
Abstract

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. © EDP Sciences.

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author
publishing date
type
Contribution to journal
publication status
published
in
Europhysics Letters
volume
71
issue
2
pages
7 pages
publisher
EDP Sciences
external identifiers
  • Scopus:22544433723
ISSN
0295-5075
DOI
10.1209/epl/i2005-10071-9
language
English
LU publication?
no
id
00a01ed9-ebbd-451a-ab2d-f1fea7d667bb
date added to LUP
2016-05-04 12:45:15
date last changed
2016-10-30 04:47:06
@misc{00a01ed9-ebbd-451a-ab2d-f1fea7d667bb,
  abstract     = {<p>High-pressure X-ray diffraction, Mössbauer, and Raman studies in the antiferromagnetic insulators RFeO<sub>3</sub> 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 Fe<sup>3+</sup>; a manifestation of a new kind of isostructural phase transition. These studies suggest that the RFeO<sub>3</sub> perovskite is a rather sturdy oxide-structure, maintaining its original structural symmetry beyond 125 GPa. © EDP Sciences.</p>},
  author       = {Rozenberg, G. Kh and Pasternak, M. P. and Xu, W. M. and Dubrovinsky, L. S. and Carlson, S. and Taylor, R. D.},
  issn         = {0295-5075},
  language     = {eng},
  month        = {07},
  number       = {2},
  pages        = {228--234},
  publisher    = {ARRAY(0x87ed980)},
  series       = {Europhysics Letters},
  title        = {Consequences of pressure-instigated spin crossover in RFeO<sub>3</sub> perovskites; a volume collapse with no symmetry modification},
  url          = {http://dx.doi.org/10.1209/epl/i2005-10071-9},
  volume       = {71},
  year         = {2005},
}