Valence, spin, and orbital state of Co ions in one-dimensional Ca3Co2O6 : An x-ray absorption and magnetic circular dichroism study
Physical Review B Volume 74 Issue 24
Page 245111-1-245111-5
published_at 2006-12-14
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| File | |
| Title ( eng ) |
Valence, spin, and orbital state of Co ions in one-dimensional Ca3Co2O6 : An x-ray absorption and magnetic circular dichroism study
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| 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
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| Source Title |
Physical Review B
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| Volume | 74 |
| Issue | 24 |
| Start Page | 245111-1 |
| End Page | 245111-5 |
| 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.
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| Language |
eng
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| Resource Type | journal article |
| Publisher |
American Physical Society
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| Date of Issued | 2006-12-14 |
| Rights |
Copyright (c) 2006 The American Physical Society.
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| Publish Type | Version of Record |
| Access Rights | open access |
| Source Identifier |
[ISSN] 1098-0121
[DOI] 10.1103/PhysRevB.74.245111
[NCID] AA11187113
[DOI] http://dx.doi.org/10.1103/PhysRevB.74.245111
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