Physical properties of DyB4 have been studied by magnetization, specific heat, and ultrasonic measurements. The magnetic entropy change and the ultrasonic properties in the intermediate phase II indicate that the degeneracy of internal degrees of freedom is not fully lifted in spite of the formation of magnetic order. The ultrasonic attenuation and the huge softening of C44 in phase II suggests existence of electric-quadrupolar (orbital) fluctuations of the 4f-electron. These unusual properties originate from the geometrical quadrupolar frustration.
Cite
@article{arxiv.cond-mat/0506593,
title = {Geometrical quadrupolar frustration in DyB$_4$},
author = {Ryuta Watanuki and Gou Sato and Kazuya Suzuki and Masaki Ishihara and Tatsuya Yanagisawa and Yuichi Nemoto and Terutaka Goto},
journal= {arXiv preprint arXiv:cond-mat/0506593},
year = {2009}
}
Comments
4 pages, 4 figures, accepted for publication in Journal of the Physical Society of Japan