TY - JOUR
T1 - High pressure study of transition metal monoxides MnO and CoO
T2 - Structure and electrical resistance
AU - Ito, E.
AU - Yamazaki, D.
AU - Yoshino, T.
AU - Shan, S.
AU - Guo, X.
AU - Tsujimo, N.
AU - Kunimoto, T.
AU - Higo, Y.
AU - Funakoshi, K.
N1 - Copyright:
Copyright 2014 Elsevier B.V., All rights reserved.
PY - 2014/3
Y1 - 2014/3
N2 - We examined the structure of MnO and CoO up to 72 and 88. GPa, respectively, at room temperature by means of in situ X-ray diffraction using the synchrotron radiation at SPring-8. Compression was carried out with the Kawai-type apparatus equipped with sintered diamond anvils. In both MnO and CoO, the cubic B1 lattice starts distorting to the rhombohedral system at 37 and 40. GPa, respectively, which progressively proceeds under increasing pressure. Crystallographic direction of the distortion is opposite; i.e., a contraction along the diagonal [1. 1. 1] direction of the B1 lattice in MnO and a stretch in CoO. The rhombohedral distortion in 3d transition metal monoxides is discussed. Simultaneously measured electrical resistance of CoO showed characteristic change with pressure; i.e., the pronounced minimum at 14.9. GPa and the maximum at 49. GPa, which serve as good pressure fixed points.
AB - We examined the structure of MnO and CoO up to 72 and 88. GPa, respectively, at room temperature by means of in situ X-ray diffraction using the synchrotron radiation at SPring-8. Compression was carried out with the Kawai-type apparatus equipped with sintered diamond anvils. In both MnO and CoO, the cubic B1 lattice starts distorting to the rhombohedral system at 37 and 40. GPa, respectively, which progressively proceeds under increasing pressure. Crystallographic direction of the distortion is opposite; i.e., a contraction along the diagonal [1. 1. 1] direction of the B1 lattice in MnO and a stretch in CoO. The rhombohedral distortion in 3d transition metal monoxides is discussed. Simultaneously measured electrical resistance of CoO showed characteristic change with pressure; i.e., the pronounced minimum at 14.9. GPa and the maximum at 49. GPa, which serve as good pressure fixed points.
KW - CoO
KW - Electrical resistance
KW - High pressure
KW - MnO
KW - Sintered diamond In situ X-ray observation Rhombohedral distortion
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U2 - 10.1016/j.pepi.2013.12.009
DO - 10.1016/j.pepi.2013.12.009
M3 - Article
AN - SCOPUS:84897067540
VL - 228
SP - 170
EP - 175
JO - Physics of the Earth and Planetary Interiors
JF - Physics of the Earth and Planetary Interiors
SN - 0031-9201
ER -