Spin State Transition inStudied Using Soft X-ray Absorption Spectroscopy and Magnetic Circular Dichroism
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- 26 October 2006
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 97 (17), 176405
- https://doi.org/10.1103/physrevlett.97.176405
Abstract
Using soft x-ray absorption spectroscopy and magnetic circular dichroism at the Co- edge, we reveal that the spin state transition in 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 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.
Keywords
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