Dresden 2009 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 17: Correlated Electrons: Quantum-Critical Phenomena 1

TT 17.8: Vortrag

Dienstag, 24. März 2009, 16:00–16:15, HSZ 03

Ferromagnetic quantum phase transition in Sr_1−xCa_xRuO₃ thin films — •Melanie Schneider, Vasile Moshnyaga, and Philipp Gegenwart — I. Physik. Institut, Georg-August Universität Goettingen, Friedrich-Hund-Platz 1, 37077 Goettingen

We report synthesis of Sr_1−xCa_xRuO₃ thin films, which have been grown epitaxially on SrTiO₃ substrates by metalorganic aerosol deposition technique characterized by x-ray diffraction and room-temperature STM. The physical properties were investigated by electrical resistivity and magnetization measurements. We observe a continuous suppression of itinerant electron magnetism with T_C=160K for SrRuO₃ with increasing Ca concentration x in Sr_1−xCa_xRuO₃ towards T_C→0 for x_c≈0.8. Non-Fermi liquid behaviour in the electrical resistivity is analysed for thin films with x=0.8 and x=1 down to mK temperatures.