Evidence for a temperature-induced spin-state transition of Co3+ in La2-xSrxCoO4
arXiv:1204.0730 · doi:10.1103/PhysRevB.83.174435
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+.
References in corpus (7)
- The spin state transition in LaCoO; revising a revision
- Spin blockade, orbital occupation and charge ordering in La_(1.5)Sr_(0.5)CoO4
- Magnetic correlations in La2-xSrxCoO4 studied by neutron scattering : possible evidence for stripe phases
- Magnetic order and dynamics of the charge-ordered antiferromagnet La1.5Sr0.5CoO4
- Anisotropic Susceptibility of La_2-xSr_xCoO_4 related to the Spin States of Cobalt
- Magnetic spectrum of the two-dimensional antiferromagnet La2CoO4 studied by inelastic neutron scattering
- Stripeless incommensurate magnetism in a doped strongly correlated oxide