Evidence for Multiple Phase Transitions in La_1-xCa_xCoO_3

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dc.creatorKriener, M.
dc.creatorBraden, M.
dc.creatorSenff, D.
dc.creatorZabara, O.
dc.creatorLorenz, T.
dc.date2006-05-30
dc.date.accessioned2026-07-07T08:56:33Z
dc.date.available2026-07-07T08:56:33Z
dc.descriptionWe report thermal-expansion and specific-heat data of the series La_1-xCa_xCoO_3 for 0 <= x <= 0.3. For x = 0 the thermal-expansion coefficient alpha(T) features a pronounced maximum around T = 50 K caused by a temperature-dependent spin-state transition from a low-spin state (S=0) at low temperatures towards a higher spin state of the Co^3+ ions. The partial substitution of the La^3+ ions by divalent Ca^2+ ions causes drastic changes in the macroscopic properties of LaCoO_3. Around x ~ 0.125 the large maximum in alpha(T) has completely vanished. With further increasing x three different anomalies develop.
dc.identifierhttps://arxiv.org/abs/cond-mat/0605721
dc.identifierhttp://arxiv.org/abs/cond-mat/0605721
dc.identifierJ. Magn. Magn. Mat. 310 (2007) e187-e189
dc.identifierdoi:10.1016/j.jmmm.2006.10.529
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/146654
dc.subjectStrongly Correlated Electrons
dc.titleEvidence for Multiple Phase Transitions in La_1-xCa_xCoO_3
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