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TT: Fachverband Tiefe Temperaturen

TT 58: f-Electron Systems and Heavy Fermions

TT 58.5: Vortrag

Freitag, 21. März 2025, 12:30–12:45, H31

Anisotropic antiferromagnetic order in EuPd₃Si₂ — •Michelle Ocker¹, Nour Marayatta², Michael Merz², Kristin Kliemt¹, and Cornelius Krellner¹ — ¹Physikalisches Institut, Goethe Universität Frankfurt, 60438 Frankfurt/Main, Germany — ²Karlsruhe Institute of Technology, 76021 Karlsruhe, Germany

The magnetic order of a rare earth compounds is determined by the RKKY exchange interaction. In case of Eu compounds small changes in the growth method or the initial composition can potentially lead to small composition changes which than modify the physical properties [1]. For example, the compound EuPd₃Si₂, which crystallises in the orthorhombic space group Imma, shows a ferromagnetic transition at T_C1 = 78 K and a spin reorientation at T_C2 = 5 K according to Ref. [2]. Whereas our EuPd₃Si₂ samples show an antiferromagnetic transition at T_N1 = 61 K and a possible reorientation at T_N2 = 40 K. With field aligned along the three main symmetrie directions, our samples show different degrees of anisotropy, as has been observed for related compounds [3]. In this presentation, we report about the crystal growth and our evaluation of the physical properties, from which we constructed a magnetic phase diagram.
[1] K.Kliemt et al. Cryst. Growth Des. 22, 5399 (2022).
[2] S.Sharma et al. Phys. Rev. Mater. 7, 023402 (2023).
[3] K.Shigetoh et al. Phys. Rev. B 76, 184429 (2007).

Keywords: crystal growth; anisotrop; antiferromagnetic; Europium