Single crystal growth and anisotropy of CeRuPO
C. Krellner, C. Geibel
TL;DR
This paper reports the successful growth of single crystals of CeRuPO, a ferromagnetic Kondo lattice, and investigates its magnetic anisotropy, revealing an unusual dominance of exchange interaction anisotropy over crystal electric field effects.
Contribution
It introduces a novel synthesis method for CeRuPO single crystals and uncovers its unique magnetic anisotropy behavior, contrasting with typical rare earth systems.
Findings
CeRuPO exhibits strong magnetic anisotropy with ferromagnetic order along c-axis.
The compound's exchange interaction anisotropy surpasses crystal electric field anisotropy.
Structural layering influences magnetic properties and anisotropy directions.
Abstract
We report on the single crystal growth of the ferromagnetic Kondo lattice system CeRuPO using a Sn flux method. Magnetic susceptibility and electrical resistivity measurements indicate strong anisotropy of this structurally layered compound. They evidence that the magnetic moments order ferromagnetically along the c-direction of the tetragonal unit cell, whereas the crystal electric field (CEF) anisotropy favors the ab-plane. Therefore, CeRuPO presents the unusual case within rare earth systems, where the anisotropy of the interionic exchange interaction overcomes the single ion anisotropy due to the CEF interaction.
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