We examine trivalent Pr crystal field models with near-degeneracy of the two lowest crystal field levels, where interaction-induced quadrupolar and dipolar moments are as important as the permanent moments of the crystal field ground state. We find that the Gamma1-Gamma4 level scheme yields a successful description of the antiferroquadrupolar ordering of PrFe4P12. For PrBa2Cu3O6, we argue that quadrupolar interaction is important for understanding the Pr ordering transition at 11K.
Cite
@article{arxiv.cond-mat/0212345,
title = {Quadrupolar interactions in Pr compounds: PrFe4P12 and PrBa2Cu3O6},
author = {A. Kiss and P. Fazekas},
journal= {arXiv preprint arXiv:cond-mat/0212345},
year = {2009}
}
Comments
One of the figures, and a few sentences replaced. 8 pages, 5 figures, iopart submitted to the Proceedings of the conference on "Advances in the Physics of f-electron Systems (JAERI Tokai, Japan), accepted for publication in J. Phys.: Condensed Matter