Abstract
crystallizing in the orthorhombic -type crystal structure, was studied by means of dc and ac magnetic susceptibility, magnetization, electrical resistivity, magnetoresistivity, Hall effect, and specific-heat measurements. The compound orders antiferromagnetically at due to the presence of well localized magnetic moments, which are partly screened via a Kondo-like mechanism. The electrical behavior is governed by an interplay of Ruderman-Kittel-Kasuya-Yosida and Kondo interactions modified by crystal-field effects. The Kondo temperature is of similar magnitude as and the overall crystal electric field splitting is of the order of 160 K. The low-temperature specific heat exhibits some enhancement indicating the formation of moderate-heavy quasiparticles in the antiferromagnetic state. The specific variation with applied magnetic field of the main physical characteristics of points at a complex magnetic structure of the compound in the ordered region.
- Received 31 January 2003
DOI:https://doi.org/10.1103/PhysRevB.67.224417
©2003 American Physical Society