Antiferromagnetic ordering in the Kondo lattice system Yb$_2$Fe$_3$Si$_5$

Yogesh Singh; S. Ramakrishnan; Z. Hossain; C. Geibel

doi:10.1103/PhysRevB.66.014415

paper

Antiferromagnetic ordering in the Kondo lattice system Yb $_{2}$ Fe $_{3}$ Si $_{5}$

arXiv:cond-mat/0304110 · doi:10.1103/PhysRevB.66.014415

Abstract

Compounds belonging to the R $_{2}$ Fe $_{3}$ Si $_{5}$ series exhibit unusual superconducting and magnetic properties. Although a number of studies have been made on the first reentrant antiferromagnet superconductor Tm $_{2}$ Fe $_{3}$ Si $_{5}$ , the physical properties of Yb $_{2}$ Fe $_{3}$ Si $_{5}$ are largely unexplored. In this work, we attempt to provide a comprehensive study of bulk properties such as, resistivity, susceptibility and heat-capacity of a well characterized polycrystalline Yb $_{2}$ Fe $_{3}$ Si $_{5}$ . Our measurements indicate that Yb $^{3 +}$ moments order antiferromagnetically below 1.7 K. Moreover, the system behaves as a Kondo lattice with large Sommerfeld coefficient ( $γ$ ) of 0.5~J/Yb mol K $^{2}$ at 0.3 K, which is well below T $_{N}$ . The absence of superconductivity in Yb $_{2}$ Fe $_{3}$ Si $_{5}$ down to 0.3 K at ambient pressure is attributed to the presence of the Kondo effect.

10 pages, 3 figures, tex document. A fuller version has appeared in PRB. Here we have omitted the figures showing the crystal structure and the fitting of the X-ray pattern. Also the table with the lattice parameters obtained from fitting has been removed

Antiferromagnetic ordering in the Kondo lattice system Yb2​Fe3​Si5​

Abstract

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Antiferromagnetic ordering in the Kondo lattice system Yb $_{2}$ Fe $_{3}$ Si $_{5}$