Evidence for a temperature-induced spin-state transition of Co3+ in La2-xSrxCoO4

N. Hollmann; M. W. Haverkort; M. Benomar; M. Cwik; M. Braden; T. Lorenz

doi:10.1103/PhysRevB.83.174435

Evidence for a temperature-induced spin-state transition of Co3+ in La2-xSrxCoO4

Strongly Correlated Electrons 2012-04-04 v1

Authors: N. Hollmann , M. W. Haverkort , M. Benomar , M. Cwik , M. Braden , T. Lorenz

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Abstract

We study the magnetic susceptibility of mixed-valent La2-xSrxCoO4 single crystals in the doping range of 0.5<= x <= 0.8 for temperatures up to 1000 K. The magnetism below room temperature is described by paramagnetic Co2+ in the high-spin state and by Co3+ in the non-magnetic low-spin state. Above room temperature, an increase in susceptibility compared to the behavior expected from Co2+ is seen, which we attribute to a spin-state transition of Co3+. The susceptibility is analyzed by comparison to full-multiplet calculations for the thermal population of the high- and intermediate-spin states of Co3+.

Keywords

spin-state transition magnetic susceptibility Co3+ La2-xSrxCoO4 full-multiplet calculation

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@article{arxiv.1204.0730,
  title  = {Evidence for a temperature-induced spin-state transition of Co3+ in La2-xSrxCoO4},
  author = {N. Hollmann and M. W. Haverkort and M. Benomar and M. Cwik and M. Braden and T. Lorenz},
  journal= {arXiv preprint arXiv:1204.0730},
  year   = {2012}
}

Evidence for a temperature-induced spin-state transition of Co3+ in La2-xSrxCoO4

Abstract

Keywords

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