The magnetic behavior of single-crystal Ho2PdSi3, crystallizing in an AlB2-derived hexagonal structure, is investigated by magnetic susceptibility (χ) and electrical resistivity (ρ) measurements along two directions. There is no dramatic anisotropy in the high temperature Curie-Weiss parameter or in the ρ and isothermal magnetization data, though there is a noticeable anisotropy in the magnitude of ρ between two perpendicular orientations. The degree of anisotropy is overall less prominent than in the Gd (which is an S-state ion!) and Tb analogues. A point of emphasis is that this compound undergoes long range magnetic ordering below 8 K as in the case of analogous Gd and Dy compounds. Considering this fact for these compounds with well-localised f-orbital, the spin glass freezing noted for isomorphous U compounds in the recent literature could be attributed to the role of the f-ligand hybridization, rather than just Pd-Si disorder.
@article{arxiv.cond-mat/0207199,
title = {Magnetic behavior of single crystalline Ho$_2$PdSi$_3$},
author = {E. V. Sampathkumaran and H. Bitterlich and K. K. Iyer and W. Löser and G. Behr},
journal= {arXiv preprint arXiv:cond-mat/0207199},
year = {2009}
}