Abstract
We studied the physical properties of two Kondo-lattice compounds, and , by a combination of electric transport, magnetic, and thermodynamic measurements. They are of -type and -type crystalline structures, respectively. shows localized long-range antiferromagnetic ordering below , with a moderate electronic Sommerfeld coefficient . A field-induced metamagnetic transition is observed near 2 T below . Magnetic susceptibility measurements on aligned powders suggest that it has an easy axis and that the cerium moments align uniaxially along axis. In contrast, is a magnetically nonordered heavy-fermion metal with enhanced . The initial onset Kondo temperatures of the two compounds are, respectively, 6 and 30 K. We discuss the role of the crystal structure to the strength of Kondo coupling. This paper provides two dense Kondo-lattice materials for further investigations on electronic correlation, quantum criticality, and heavy-electron effects.
- Received 26 August 2019
- Revised 8 October 2019
DOI:https://doi.org/10.1103/PhysRevB.100.205121
©2019 American Physical Society