Quantum criticality in CaRuO 3 – Influence of Ti substitution

Thermodynamic and transport properties of the CaRu 1– x Ti x O 3 system with x  = 0, 0.03, 0.07, 0.10, and 0.15 in magnetic field up to 9 T have been studied. The unconventional temperature dependences of magnetic susceptibility, specific heat, and electrical resistivity observed for CaRuO 3 are typ...

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Bibliographic Details
Published in:physica status solidi (b) 2012-08, Vol.249 (8), p.1607-1612
Main Authors: Baran, A., Zorkovská, A., Kajňaková, M., Šebek, J., Šantavá, E., Bradarić, I., Feher, A.
Format: Article
Language:English
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Summary:Thermodynamic and transport properties of the CaRu 1– x Ti x O 3 system with x  = 0, 0.03, 0.07, 0.10, and 0.15 in magnetic field up to 9 T have been studied. The unconventional temperature dependences of magnetic susceptibility, specific heat, and electrical resistivity observed for CaRuO 3 are typical for non‐Fermi liquids and they support the assumption about the proximity of the system to the quantum critical point. The analysis of the experimental results suggests the electronic phase separation in CaRuO 3 into ferromagnetic itinerant regions coexisting with strongly correlated ones. Substitution by titanium seems to push the system towards ferromagnetism, and drives it away from the quantum criticality.
ISSN:0370-1972
1521-3951
DOI:10.1002/pssb.201147575