Kondo-like behaviors in magnetic and thermal properties of single crystal Tm5Si2Ge2
J. H. Kim, S. J. Kim, C. I. Lee, M. A. Jung, H. J. Oh, Jong-Soo Rhyee,, Younghun Jo, Hiroyuki Mitani, Hidetoshi Miyazaki, Shin-ichi Kimura, and Y. S., Kwon
TL;DR
This study investigates the magnetic and thermal properties of single-crystal Tm5Si2Ge2, revealing Kondo-like behaviors and antiferromagnetic order below 8.01 K through comprehensive experimental analysis.
Contribution
It provides new insights into the Kondo-like behaviors and magnetic ordering in Tm5Si2Ge2, a compound with a specific crystalline electric field environment.
Findings
Long-range antiferromagnetic order below 8.01 K
Kondo-like -log T behavior in excited states
Almost trivalent Tm ions with split 4f states
Abstract
We grew the single crystal of stoichiometric Tm5Si2.0Ge2.0 using a Bridgeman method and performed XRD, EDS, magnetization, ac and dc magnetic susceptibilities, specific heat, electrical resistivity and XPS experiments. It crystallizes in orthorhombic Sm5Ge4-type structure. The mean valence of Tm ions in Tm5Si2.0Ge2.0 is almost trivalent. The 4f states is split by the crystalline electric field. The ground state exhibits the long range antiferromagnetic order with the ferromagnetically coupled magnetic moments in the ac plane below 8.01 K, while the exited states exhibit the reduction of magnetic moment and magnetic entropy and -log T-behaviors observed in Kondo materials.
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