Dresden 2011 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 4: CE: Quantum-Critical Phenomena 1

TT 4.5: Vortrag

Montag, 14. März 2011, 11:30–11:45, HSZ 201

Single-crystal growth and low temperature properties of the non-centrosymmetric heavy-fermion comound CeAuAl₃ — •Christian Franz, Andreas Bauer, Kilian Mittermüller, Alfonso Chacon, Marco Halder, and Christian Pfleiderer — Physik Department E21, Technische Universität München, München, Germany

Non-centrosymmetric heavy fermion compounds attract great interest as a platform for unconventional superconductivity and complex forms of magnetic order. We report the first successful single-crystal growth of CeAuAl₃ – an isostructural relative with space group I4mm of the heavy-fermion superconductors CeRhSi₃ and CeIrSi₃. Our single crystals were prepared from high-purity starting elements (>5N) using a bespoke all-metal sealed rod casting furnace and a bespoke image furnace. High crystal quality was established by Laue x-ray scattering, x-ray powder diffraction and EDX microprobe analysis. The low temperature properties, notably magnetisation, heat capacity and electrical resistivity, identify CeAuAl₃ as an antiferromagnetic heavy fermion compound with a low Neel temperature.