Magnetic and transport properties of single-crystal Yb 3Cu 4Ge 4

Kenichi Katoh, Masafumi Maeda, Saori Matsuda, Akira Ochiai

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

The magnetic and transport properties of single-crystal Yb 3Cu 4Ge 4 with the Gd 3Cu 4Ge 4-type orthorhombic structure are presented. Magnetization along the b-axis at 2 K saturates to 2.8 μB/Yb at 3 kOe, while that along the a- and c-axes at 2 K are gradually increasing to the value of 1.5 μB/Yb and 0.39 μB/Yb at 50 kOe, respectively. The electrical resistivity within the ab-plane shows a metallic behavior in contrast to a broad maximum at around 30 K for that along the c-axis. Each resistivity for the principal axis suddenly decreases below 8 K. The specific heat shows a λ-type sharp peak at 7.8 K. The electronic specific heat coefficient is estimated to be 29.4 mJ/mol Yb K 2 by fitting the magnetic part of the specific heat below 3 K. The magnetic entropy released up to T C is 68% of that of R ln 2, expected for the doublet ground state. It is revealed that Yb 3Cu 4Ge 4 is categorized to a weak heavy-fermion system showing a ferromagnetic transition at 7.8 K with uniaxial anisotropy along the b-axis.

Original languageEnglish
Pages (from-to)2914-2920
Number of pages7
JournalJournal of Magnetism and Magnetic Materials
Volume324
Issue number18
DOIs
Publication statusPublished - 2012 Sep 1

Keywords

  • Electrical transport
  • Ferromagnetically ordered material
  • Magnetization

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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