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Regensburg 2010 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 27: CE: Poster Session

TT 27.23: Poster

Wednesday, March 24, 2010, 14:00–18:00, Poster D1

Ferromagnetic quantum phase transition in Sr1−xCaxRuO3 thin films — •Melanie Schneider1, Vasile Moshnyaga1, Philipp Gegenwart1, Markus Wissinger2, and Dirk Fuchs21I. Physikalisches Institut, Georg-August Universität Goettingen,Friedrich-Hund-Platz 1, 37077 Goettingen, Germany — 2Karlsruher Institut für Technologie (KIT), Institut für Festkörperphysik, Postfach 3640, 76021 Karlsruhe, Germany

We report results on Sr1−xCaxRuO3 thin films which have been grown epitaxially on SrTiO3 substrates by metalorganic aerosol deposition. The films are characterized using X-ray diffraction, room-temperature STM, as well as atomic-resolution transmission electron microscopy. The physical properties are investigated by electrical resistivity and magnetization measurements. We observe a continuous suppression of itinerant electron magnetism with TC=160K for SrRuO3 with increasing Ca concentration x in Sr1−xCaxRuO3 towards TC→0 for xc=0.7. At x>0.7 indications for non-Fermi liquid behavior are found in the low-temperature resistivity. For selected thin films the measurements are extended to mK temperatures. We also report low-temperature electrical resistivity measurements on thin films grown at KIT Karlsruhe by pulsed-laser deposition on various different substrates. Work supported by DFG through SFB 602, TP A19.

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