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Quantum criticality in CaRuO 3 – Influence of Ti substitution
Author(s) -
Baran A.,
Zorkovská A.,
Kajňaková M.,
Šebek J.,
Šantavá E.,
Bradarić I.,
Feher A.
Publication year - 2012
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201147575
Subject(s) - criticality , ferromagnetism , condensed matter physics , quantum critical point , electrical resistivity and conductivity , quantum , substitution (logic) , materials science , quantum phase transition , phase transition , physics , quantum mechanics , nuclear physics , computer science , programming language
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.