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Berlin 2012 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 47: Correlated Electrons: Spin Systems and Itinerant Magnets 2

TT 47.1: Talk

Friday, March 30, 2012, 09:30–09:45, H 0104

Single-Crystal Growth and Low Temperature Properties of the Itinerant Antiferromagnet Cr11B2Andreas Bauer1, •Alexander Regnat1, Saskia Gottlieb-Schönmeyer1, Michael Wagner1, Christian Bluhm2, Sabine Wurmehl2, Bernd Büchner2, and Christian Pfleiderer11Physik-Department E21, Technische Universität München, James-Franck-Straße, D-85748 Garching, Germany — 2Leibniz-Institut für Festkörper- und Werkstoffforschung (IFW) Dresden, D-01171 Dresden, Germany

We report the preparation and low temperature properties of the itinerant antiferromagnet Cr11B2. Large single crystals were grown by means of optical float-zoning, where the feed rods were prepared in a solid state reaction using high purity Cr and B powder in a bespoke tungsten crucible. 10B depleted boron was used to permit detailed neutron scattering studies. The crystal grown has the highest residual resisitvity ratio reported to date in the literature of 31 and 11 for current along the crystallographic c- and a-directions, respectively [1]. Measurements of the low temperature specific heat, magnetization and electrical resistivity are consistent with SDW type antiferromagnetic order below TN=88 K [2], which is remarkably insensitive to large applied magnetic fields.
Tanaka et al., J Less-Comm Met, 50, 15 (1967)
Funhashi et al., Solid State Commun, 23, 859 (1977)

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