Kondo-like behaviors in magnetic and thermal properties of single crystal Tm5Si2Ge2

Details Kondo-like behaviors in magnetic and thermal properties of single crystal Tm5Si2Ge2 Kondo-like behaviors in magnetic and thermal properties of single crystal Tm5Si2Ge2

2009-11-30

arxiv.org/abs/0911.5640v1

Physics

Condensed Matter

Strongly Correlated Electrons

8 pages, 13 figures

Scientific paper

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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