Robustness of non-Fermi-liquid behavior near the ferromagnetic critical point in clean ZrZn2

Shinya Takashima, Minoru Nohara, Hiroaki Ueda, Nao Takeshita, Chieko Terakura, Fumiko Sakai, Hidenori Takagi

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

Electrical resistivity ρ of a weak itinerant ferromagnet ZrZn 2 with a low residual resistivity ρ0 ≃ 0.46 μΩcm was measured under hydrostatic pressure P up to 3.2 GPa. T 2-behavior of ρ, a hallmark of Fermi liquid, was not observed down to 1 K not only at around the ferromagnetic critical point Pc ∼ 2 GPa but over an entire pressure range investigated. The temperature dependence of ρ at low temperatures evolved from T5/3 in the ferromagnetic phase to T3/2 in the paramagnetic phase. This change, however, was very weak and it was hard to capture the signature of critical point in the resistivity. Such a breakdown of Fermi liquid over a remarkably wide phase space indicates the lack of some ingredient in the description of magnetic quantum critical point in clean metals.

Original languageEnglish
Article number043704
Journaljournal of the physical society of japan
Volume76
Issue number4
DOIs
Publication statusPublished - Apr 1 2007
Externally publishedYes

Keywords

  • High pressure
  • Non-Fermi liquid
  • Quantum critical point
  • Weak ferromagnet
  • ZrZn

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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