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Magnetic structures of non-cerium analogues of heavy-fermion Ce2RhIn8: The case of Nd2RhIn8, Dy2RhIn8, and Er2RhIn8

Publikace na Matematicko-fyzikální fakulta |
2014

Tento text není v aktuálním jazyce dostupný. Zobrazuje se verze "en".Abstrakt

R2RhIn8 compounds (space group P4/mmm, R is a rare-earth element) belong to a large group of structurally related tetragonal materials which involves several heavy-fermion superconductors based on Ce. We have succeeded in growing single crystals of compounds with Nd, Dy, and Er, and following our previous bulk measurements, we performed neutron-diffraction studies to determine their magnetic structures.

The Laue diffraction experiment showed that the antiferromagnetic order below the Nccl temperature is in all three compounds characterized by the propagation vector k = (1/2,1/2,1/2). The amplitude and direction of the magnetic moments, as well as the invariance symmetry of the magnetic structure, were determined by subsequent experiments using two-and four-circle diffractometers.

The critical exponents were determined from the temperature dependence of the intensities below T-N