TY - JOUR
T1 - Local symmetry and crystalline field effects in charge-ordered Yb4As3
AU - Sakai, Osamu
AU - Kohgi, Masahumi
AU - Shiba, Hiroyuki
AU - Ochiai, Akira
AU - Aoki, Hidekazu
AU - Takegahara, Katsuhiko
AU - Harima, Hisatomo
N1 - Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.
PY - 2000/11
Y1 - 2000/11
N2 - Yb4As3 exhibits very anisotropic magnetic properties, while its dynamic form factor of the inelastic excitation spectra at very low temperatures are well described by an almost-isotropic one-dimensional Heisenberg model, which is supplemented by the Dzyaloshinsky-Moriya interaction. To clarify the origin of this feature, the crystalline field effects in the inelastic neutron scattering and the magnetic susceptibility data of Yb4As3 are analyzed to separate cut the contribution of the lowest Kramers-doublet state from those of the crystalline field excited states. The isotropic excitation mode is ascribed to the former state. The excitation spectra specified by the magnetic polarization directions are also calculated to give additional information of the crystalline field states. It is also pointed out that the magnetization parallel to the c-axis is induced for the magnetic field, which is applied perpendicular to the c-axis in the c-plane. Its magnitude is proportional to the cube of the field strength. The internal field can have different values on the two Yb3+ sites which are connected by the glide operation. It is shown that the magnetization can give us detailed information of the local C3 symmetry around the Yb3+ site.
AB - Yb4As3 exhibits very anisotropic magnetic properties, while its dynamic form factor of the inelastic excitation spectra at very low temperatures are well described by an almost-isotropic one-dimensional Heisenberg model, which is supplemented by the Dzyaloshinsky-Moriya interaction. To clarify the origin of this feature, the crystalline field effects in the inelastic neutron scattering and the magnetic susceptibility data of Yb4As3 are analyzed to separate cut the contribution of the lowest Kramers-doublet state from those of the crystalline field excited states. The isotropic excitation mode is ascribed to the former state. The excitation spectra specified by the magnetic polarization directions are also calculated to give additional information of the crystalline field states. It is also pointed out that the magnetization parallel to the c-axis is induced for the magnetic field, which is applied perpendicular to the c-axis in the c-plane. Its magnitude is proportional to the cube of the field strength. The internal field can have different values on the two Yb3+ sites which are connected by the glide operation. It is shown that the magnetization can give us detailed information of the local C3 symmetry around the Yb3+ site.
KW - C symmetry
KW - Crystalline field effect
KW - Magnetic excitation spectrum
KW - Magnetization
KW - YbAs
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U2 - 10.1143/JPSJ.69.3633
DO - 10.1143/JPSJ.69.3633
M3 - Article
AN - SCOPUS:0034555666
VL - 69
SP - 3633
EP - 3641
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
SN - 0031-9015
IS - 11
ER -