Abstract
Resonant soft x-ray Bragg diffraction at the Dy M4,5 edges has been exploited to study Dy multipole motifs in DyB2C2. Our results are explained by introducing the intra-atomic quadrupolar interaction between the core 3d and valence 4f shell. This allows us to determine for the first time higher-order multipole moments of dysprosium 4f electrons and to draw their precise charge density. The Dy hexadecapole and hexacontatetrapole moment have been estimated at -20% and +30% of the quadrupolar moment, respectively. No evidence for the lock-in of the orbitals at TN has been observed, in contrast to earlier suggestions. The multipolar interaction and the structural transition cooperate along c but they compete in the basal plane, explaining the canted structure along [110].
Original language | English |
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Article number | 012 |
Pages (from-to) | 11195-11202 |
Number of pages | 8 |
Journal | Journal of Physics Condensed Matter |
Volume | 18 |
Issue number | 49 |
DOIs | |
Publication status | Published - 2006 Dec 13 |
Externally published | Yes |
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics