SKM 2023 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 4: f-Electron Systems and Heavy Fermions I
TT 4.13: Vortrag
Montag, 27. März 2023, 12:45–13:00, HSZ 201
Observation of anomalous magneto-transport properties in CeAl2 — •Christian Oberleitner, Christian Franz, Alexander Regnat, Jan Spallek, Michael Petrov, Georg Benka, Andreas Bauer, Marc Wilde, and Christian Pfleiderer — Physik-Department, Technische Universität München, D-85748 Garching, Germany
Rare-earth compounds historically have attracted great interest due to their diverse low-temperature properties comprising complex magnetic order, superconductivity, and heavy fermion behaviour. We report a study of the electrical transport properties of non-centrosymmetric CeAl2 at low temperatures and large magnetic fields. For our study single crystals were grown by means of optical float-zoning, where Laue and powder x-ray diffraction as well as low residual resistivities confirm excellent sample quality. Measurements of the magnetization, specific heat, and torque magnetization were used to map out the magnetic phase diagram for different crystallographic orientations. In the regime of the antiferromagnetic order, which supports multi-k antiferromagnetic structures, the magnetoresistance and Hall effect are highly anomalous suggestive of an intricate interplay of anomalous and topological contributions.