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TT: Fachverband Tiefe Temperaturen

TT 31: Correlated Electrons: Quantum-Critical Phenomena 2

TT 31.1: Talk

Wednesday, March 28, 2012, 15:00–15:15, H 3010

Ferromagnetic quantum phase transition in Sr_1−xCa_xRuO₃ thin films — •Melanie Schneider, Vasily Moshnyaga, Sebastian Esser, and Philipp Gegenwart — Georg-August Universität-Goettingen, Friedrich-Hund-Platz 1, 37077 Goettingen, Germany

The Sr_1−xCa_xRuO₃ series recently received a lot of attention because of a continuous evolution from itinerant electron magnetism towards a paramagnetic metallic state. We focus on the region near the quantum phase transition at x=0.7. Using metal-organic aerosol deposition, we have grown high-quality epitaxial thin films. For pure CaRuO₃ (x=1), grown on NdGaO₃, the residual resistivity ratio (RRR) approaches 55, i.e. the highest value reported up to now. Pronounced non-Fermi liquid effects are observed in the temperature dependence of the electrical resistivity, which could be suppressed by the application of large magnetic fields.

This work is supported by the German Science foundation through SFB 602, TP A19.