Kondo effect of U impurities in dilute (YU)2Zn17

Shigeru Takagi, Hiroyuki Suzuki, Kousuke Anzai

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Extending previous work on single-site properties of U ions in (LaU)2Zn17, we have investigated, from ρ(T), χ(T) and Cp(T) on single crystals, (Yi1-xUx)2Zn17 with x = 0.025 and 0.050, which has almost the same unit-cell volume as an antiferromagnetic heavy-electron compound U2Zn17. Remarkable features in the dilute-impurity limit have been clarified, which include Kondo behavior of ρ(T), large and almost isotropic χimp(T), and strongly enhanced Cimp(T)/T with gigantic γimp = 2.02 2.05 J/K2 · mole-U as T → 0 due to a low characteristic energy-scale of the system. It is shown that gross features of the data are explained in terms of the conventional Kondo effect in the presence of the crystal field with the U3+ Γ6 doublet ground state. It is also shown that the variation of γ with the unit-cell volume in related systems is not explained as a volume effect on TK and that even the behavior of fictitious "paramagnetic" U2Zn17 is not described as a collection of U impurities in dilute (YU)2Zn17.

Original languageEnglish
Pages (from-to)3098-3106
Number of pages9
Journaljournal of the physical society of japan
Volume70
Issue number10
DOIs
Publication statusPublished - 2001 Oct 1

Keywords

  • (YU)Zn
  • Crystal field
  • Kondo effect
  • U impurity
  • U-based heavy electron
  • UZn

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Kondo effect of U impurities in dilute (YU)<sub>2</sub>Zn<sub>17</sub>'. Together they form a unique fingerprint.

  • Cite this