Spin State Transition in LaCoO3 Studied Using Soft X-ray Absorption Spectroscopy and Magnetic Circular Dichroism
Physical Review Letters Volume 97 Issue 17
Page 176405-1-176405-4
published_at 2006-10-26
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| File | |
| Title ( eng ) |
Spin State Transition in LaCoO3 Studied Using Soft X-ray Absorption Spectroscopy and Magnetic Circular Dichroism
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| Creator |
Haverkort Maurits W.
Hu Zhiwei
Cezar Júlio C.
Burnus Tobias
Hartmann Helena
Reuther Marco
Zobel C.
Lorenz Thomas
Brookes Nicholas B.
Hsieh Hui-Huang
Lin Hong-Ji
Chen Chien-Te
Tjeng L. Hao
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| Source Title |
Physical Review Letters
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| Volume | 97 |
| Issue | 17 |
| Start Page | 176405-1 |
| End Page | 176405-4 |
| Abstract |
Using soft x-ray absorption spectroscopy and magnetic circular dichroism at the Co-L2,3 edge, we reveal that the spin state transition in LaCoO3 can be well described by a low-spin ground state and a triply degenerate high-spin first excited state. From the temperature dependence of the spectral line shapes, we find that LaCoO3 at finite temperatures is an inhomogeneous mixed-spin state system. It is crucial that the magnetic circular dichroism signal in the paramagnetic state carries a large orbital momentum. This directly shows that the currently accepted low- or intermediate-spin picture is at variance. Parameters derived from these spectroscopies fully explain existing magnetic susceptibility, electron spin resonance, and inelastic neutron data.
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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 | 2006-10-26 |
| Rights |
Copyright (c) 2006 The American Physical Society.
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| Publish Type | Version of Record |
| Access Rights | open access |
| Source Identifier |
[ISSN] 0031-9007
[DOI] 10.1103/PhysRevLett.97.176405
[NCID] AA00773679
[DOI] http://dx.doi.org/10.1103/PhysRevLett.97.176405
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