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ID 19270
file
creator
Burnus, Tobias
Hu, Zhiwei
Haverkort, Maurits W.
Cezar, Júlio C.
Flahaut, Delphine
Hardy, Vincent
Maignan, Antoine
Brookes, Nicholas B.
Hsieh, Hui-Huang
Lin, Hong-Ji
Chen Chien-Te
Tjeng, L. Hao
abstract
We have investigated the valence, spin, and orbital state of the Co ions in the one-dimensional cobaltate Ca3 Co2 O6 using x-ray absorption and x-ray magnetic circular dichroism at the Co- L2,3 edges. The Co ions at both the octahedral Cooct and trigonal Cotrig sites are found to be in a 3+ state. From the analysis of the dichroism we established a low-spin state for the Cooct and a high-spin state with an anomalously large orbital moment of 1.7 μB at the Cotrig 3+ ions. This large orbital moment along the c -axis chain and the unusually large magnetocrystalline anisotropy can be traced back to the double occupancy of the d2 orbital in trigonal crystal field.
journal title
Physical Review B
volume
Volume 74
issue
Issue 24
start page
245111-1
end page
245111-5
date of issued
2006-12-14
publisher
American Physical Society
issn
1098-0121
ncid
publisher doi
language
eng
nii type
Journal Article
HU type
Journal Articles
DCMI type
text
format
application/pdf
text version
publisher
rights
Copyright (c) 2006 The American Physical Society.
relation url
department
Graduate School of Advanced Sciences of Matter