Regensburg 2019 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 17: Poster Session: Correlated Electrons 1

TT 17.7: Poster

Montag, 1. April 2019, 15:00–18:30, Poster D

CeRu₂P₂ and CeCo₂P₂: Single Crystal Growth Methods and Physical Characterization — •Fabian Feldmann, Marius Peters, Kristin Kliemt, and Cornelius Krellner — Physikalisches Institut Goethe Universität Frankfurt/Main

CeT₂P₂ (T = Co, Ru) are rare-earth ternary phosphides with tetragonal ThCr₂Si₂ type crystal structure. CeRu₂P₂ is an intermediate valent system [1] and CeCo₂P₂ is an antiferromagnet with a rather high Néel temperature T_N = 440 K [2], most likely due to an interplay of 3d and 4f magnetism.

Here, we present crystal growth methods to obtain millimeter-sized single crystals. These growths were executed with Sn-flux and self-flux with temperatures up to 1500 ^∘C. Optical microscopy, Powder X-Ray Diffraction (PXRD), Energy Dispersive X-ray spectroscopy (EDX) and Laue method were used for chemical characterization and confirmation of single crystallinity.

In addition, we report on measurements of specific heat, magnetic susceptibility and electrical resistivity. We confirm some measurements, for instance a broad maximum in electrical resistivity at T = 180 K and metallic behavior at lower temperatures for CeRu₂P₂ [3]. We also show new measurements such as magnetic susceptibility of CeCo₂P₂, now relating to crystal orientation.
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