Abstract
The low-temperature behavior of ${\text{Ce}}_{2}{\text{RuZn}}_{4}$ has been investigated. Specific-heat and magnetic-susceptibility data reveal an antiferromagnetic transition at a N\'eel temperature of 2 K. ${\text{Ce}}_{2}{\text{RuZn}}_{4}$ is a static intermediate-valent compound with two crystallographically independent cerium atoms. The magnetic data clearly show that only one cerium site is magnetic $({\text{Ce}}^{3+})$, while the second one carries no magnetic moment. The experimental data are interpreted with the help of first-principles electronic structure calculations using density-functional theory and the augmented spherical wave method. The calculations reveal the occurrence of two different cerium sites, which are characterized by strongly localized magnetic moments and strong Ce-Ru bonding.
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