Regensburg 2022 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 21: Correlated Electrons: Poster Session

TT 21.1: Poster

Wednesday, September 7, 2022, 15:00–18:00, P1

Single crystal growth and characterization of CeCoIn₅ and GdCoIn₅ — •Leonard Essich, Anja Philipp, Alexej Kraiker, Kristin Kliemt, and Cornelius Krellner — Physikalisches Institut, Goethe Universität Frankfurt, 60438 Frankfurt am Main

The family of 115 rare-earth compounds RTIn₅ (T = Co, Rh, Ir) with tetragonal crystal structure received growing attention over the past decades. Low-temperature phenomenologies associated with the strong correlations of the 4f-electrons of the rare-earth element and the quasi-two-dimensionality of the Fermi surface such as spin and valence fluctuations [1], heavy fermions [2], and anisotropic superconductivity [3] are observed for the Ce-based compounds. The GdTIn₅ series show magnetic ordering of local 4f-moments with a reduced interplane coupling for GdCoIn₅ [3].

In this contribution, we show our results of the self-flux growth of CeCoIn₅ and GdCoIn₅ single crystals. The crystallographic orientation was determined using microscopy and Laue X-ray diffraction along with the characterization by powder X-ray diffraction, magnetization, specific-heat and specific-resistivity measurements for both compounds.

[1] D. Betancourth et al., JMMM 375, 744 (2015)

[2] Y. Onuki et al., J. Phys. Soc. Jpn. 71, 162 (2002)

[3] J.I. Facio et al., PRB 91, 014409 (2015)