SKM 2021 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 9: Poster Session: Correlated Electrons
TT 9.5: Poster
Dienstag, 28. September 2021, 13:30–16:00, P
Anisotropic magnetic and thermodynamic properties of single crystals of antiferromagnetic CePdAl3 — •Vivek Kumar1, Andreas Bauer1, Christian Franz2,3, Rudolf Schönmann1, Michal Stekiel1, Astrid Schneidewind1, and Christian Pfleiderer1 — 1Physik-Department, Technische Universität München, D-85748 Garching, Germany — 2JCNS at MLZ, FZ Jülich GmbH, Lichtenbergstr. 1, D-85747 Garching — 3TUM at MLZ, Technische Universität München, D-85748 Garching, Germany
Recently, the class of CeTAl3 (T is a transition metal) attracted considerable scientific attention when strong coupling between phonons and crystal electric field excitations was demonstrated in CeCuAl3 and CeAuAl3 [1,2]. Here, we report on the magnetic and thermodynamic properties of single-crystalline CePdAl3 studied by means of ac susceptibility, magnetization, and specific heat measurements. The compound crystallizes in an orthorhombic crystal structure and displays antiferromagnetic order below TN = 5.6 K. A strong anisotropy was observed in magnetic properties. We obtained a large electronic specific heat coefficient, γ = 121 mJ K−2 mol−1, characteristic of heavy-fermion behavior. Field-driven magnetic transitions were detected for fields applied along the easy basal plane, which leads to a complex magnetic phase diagram.
[1] Franz et al., J. Alloys Compd. 688, 978 (2016).
[2] Čermák et al., Proc. Natl. Acad. Sci. U.S.A. 116, 6695 (2019).