Composition effect of kondo behavior in aualce quasicrystalline approximants

Yuji Muro, Tadashi Fukuhara, Takahiro Namiki, Tomohiko Kuwai, Akira Sakurai, Asuka Ishikawa, Shintaro Suzuki, Ryuji Tamura

Research output: Contribution to journalArticlepeer-review

Abstract

We have studied the magnetic and transport properties of Tsai-type quasicrystalline approximants, AuxAl841xCe16 and AuyAl861yCe14 by the measurements of magnetic susceptibility», specific heat Cp and electrical resistivity µ. A Curie-Weiss behavior in» for all compounds indicates the stable trivalent state of Ce ions in AuAlCe. The effective magnetic moment increases with increasing the Au concentration whereas the Weiss temperature decreases. These behaviors suggest the Kondo effect in AuAlCe suppresses with the increase of Au concentration. In Cp, all measured compounds show a broad peak due to the Kondo resonance at 0.8 K. In addition, Cp/T shows a peak below 0.6 K, which implies the existence of spin-glass transition. In all compounds, a pronounced 1log T behavior due to Kondo effect are observed in µ(T) below 10 K. Moreover, AuyAl861yCe14 approximants are the first example displaying a precursor of coherent Kondo state at low temperatures because a broad maximum is observed in µ(T) at 1.3 K.

Original languageEnglish
Pages (from-to)321-324
Number of pages4
JournalMaterials Transactions
Volume62
Issue number3
DOIs
Publication statusPublished - 1 Mar 2021

Keywords

  • AuAlCe
  • Coherent kondo state
  • Electrical resistivity
  • Kondo effect
  • Magnetic susceptibility
  • Quasicrystal approximants
  • Specific heat
  • Spin-glass

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