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

• Verfasst von: Hollmann, Nils [VerfasserIn]
• Verfasst von: Haverkort, Maurits W. [VerfasserIn]
• Titel: Evidence for a temperature-induced spin-state transition of Co3+ in La2-xSrxCoO4
• Verf.angabe: N. Hollmann, M.W. Haverkort, M. Benomar, M. Cwik, M. Braden, and T. Lorenz
• Fussnoten: Im Titel ist die Ziffer 3 sowie das Plus-Zeichen hochgestellt; die Ziffern bzw. Zeichen 2-x, x, 4 sind tiefgestellt ; Gesehen am 27.11.2017
• Titel Quelle: Enthalten in: De.arxiv.org
• Jahr Quelle: 2011
• Band/Heft Quelle: (2011) Artikel-Nummer 1204.0730, 5 Seiten
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 156572285X

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+.