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TT 34.6: Vortrag
Mittwoch, 18. März 2020, 10:45–11:00, HSZ 204
CeRu2P2 and CeCo2P2: Single Crystal Growth Method and Magnetic Properties — •Fabian Feldmann, Marius Peters, Johannes Hellwig, 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 , and CeCo2P2 is an antiferromagnet with a rather high Néel temperature TN = 440 K , most likely due to an interplay of 3d and 4f magnetism, although Ce is close to a non-magnetic Ce4+ state.
Here, we present the high-temperature metal-flux technique that was used to obtain millimeter-sized single crystals. Furthermore, we show magnetic measurements for both systems. CeCo2P2 shows anisotropic behavior above the ordering temperature, which is unexpected for itinerant 3d magnetism. CeRu2P2 as a reference system without the d magnetism of Co also shows anisotropic behavior and may indicate that CeCo2P2 also exhibits some remaining Ce 4f magnetism .
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