Spin state transition in LaCoO 3 studied using soft x-ray absorption spectroscopy and magnetic circular dichroism
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 lin...
Saved in:
| Main Author: | |
|---|---|
| Format: | Article (Journal) |
| Language: | English |
| Published: |
26 October 2006
|
| In: |
Physical review letters
Year: 2006, Volume: 97, Issue: 17, Pages: 176405 |
| ISSN: | 1079-7114 |
| DOI: | 10.1103/PhysRevLett.97.176405 |
| Online Access: | Verlag, Volltext: http://dx.doi.org/10.1103/PhysRevLett.97.176405 Verlag, Volltext: https://link.aps.org/doi/10.1103/PhysRevLett.97.176405 
|
| Author Notes: | M.W. Haverkort, Z. Hu, J.C. Cezar, T. Burnus, H. Hartmann, M. Reuther, C. Zobel, T. Lorenz, A. Tanaka, N.B. Brookes, H.H. Hsieh, H.-J. Lin, C.T. Chen, and L.H. Tjeng |
| Summary: | 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. |
|---|---|
| Item Description: | Im Titel ist "3" tiefgestellt Gesehen am 08.11.2017 |
| Physical Description: | Online Resource |
| ISSN: | 1079-7114 |
| DOI: | 10.1103/PhysRevLett.97.176405 |