Antiferro-Polarization of Octupolar Moment in Phase III of CeB6- Analysis of NMR Spectra

Autor:	Hiroyuki Shiba, Peter Thalmeier, Osamu Sakai, Ryosuke Shiina
Rok vydání:	1999
Předmět:	Physics NMR spectra database Hyperfine coupling Condensed matter physics Neutron diffraction General Physics and Astronomy Antiferromagnetism Condensed Matter::Strongly Correlated Electrons Neutron scattering Polarization (waves) Spectral line
Zdroj:	Journal of the Physical Society of Japan. 68:1364-1370
ISSN:	1347-4073 0031-9015
DOI:	10.1143/jpsj.68.1364
Popis:	Anomalous NMR spectra in phases III and III ′ of CeB 6 are analyzed theoretically by introducing a new type of hyperfine coupling of the 11 B nuclei with Ce multipolar moments. It is shown that the observed spectra can be reproduced if we take into account the antiferro-polarization of the T x y z octupole in addition to the antiferromagnetic order proposed by neutron diffraction experiment (ND). Thus ND and NMR are mutually consistent in phase III, if the octupolar contribution is properly included. The analysis of NMR gives the magnitude of the polarization of the octupolar moment. The present analysis strongly suggests that the antiferro-quadrupolar ordering of Γ 5 + type is playing an important role behind the mysterious 2 k antiferromagnetic ordering of phase III.
Databáze:	OpenAIRE
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