TY - JOUR
T1 - Consequences of pressure-instigated spin crossover in RFeO3 perovskites; a volume collapse with no symmetry modification
AU - Rozenberg, G. Kh
AU - Pasternak, M. P.
AU - Xu, W. M.
AU - Dubrovinsky, L. S.
AU - Carlson, S.
AU - Taylor, R. D.
PY - 2005/7/15
Y1 - 2005/7/15
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=22544433723&partnerID=8YFLogxK
U2 - 10.1209/epl/i2005-10071-9
DO - 10.1209/epl/i2005-10071-9
M3 - מאמר
AN - SCOPUS:22544433723
VL - 71
SP - 228
EP - 234
JO - Journal de Physique (Paris), Lettres
JF - Journal de Physique (Paris), Lettres
SN - 0295-5075
IS - 2
ER -