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arXiv · 1104.2370

Triakontadipole and high-order dysprosium multipoles in the antiferromagnetic phase of DyB$_2$C$_2$

A. J. Princep·A. M. Mulders·U. Staub·V. Scagnoli·T. Nakamura·A. Kikkawa·S. W. Lovesey·E. Balcar
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Abstract

Resonant soft x-ray Bragg diffraction at the Dy M$_{4,5}$ edges has been used to study Dy multipoles in the combined magnetic and orbitally ordered phase of DyB$_2$C$_2$. The analysis incorporates both the intra-atomic magnetic and quadrupolar interactions between the 3d core and 4f valence shells. Additionally, we introduce to the formalism the interference of magnetic and nonmagnetic oscillators. This allows a determination of the higher order multipole moments of rank 1 (dipole) to 6 (hexacontatetrapole). The strength of the Dy 4f multipole moments have been estimated at being between 7 and 78 % of the quadrupolar moment.

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A. J. Princep, A. M. Mulders, U. Staub, V. Scagnoli, T. Nakamura, A. Kikkawa, S. W. Lovesey, E. Balcar. 2011-04-13. Triakontadipole and high-order dysprosium multipoles in the antiferromagnetic phase of DyB$_2$C$_2$. https://doi.org/10.1088/0953-8984%2F23%2F26%2F266002

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