Quantum phase transition in itinerant-electron ferromagnet system U(Co1−xOsx)Al

Mizuho Maeda, Alexander V. Andreev, Kenji Shirasaki, Tomoo Yamamura, Noriaki Kimura

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3 Citations (Scopus)

Abstract

We report the magnetic phase diagram of an itinerant-electron ferromagnetic system, U(Co1xOsx)Al, derived from the C susceptibility and DC magnetization. The quantum phase transition point at which the ferromagnetic transition temperature becomes 0 K is estimated to be located at x ≈ 0.004. The tricritical point is also estimated to be located at x ≈ 0.0065, T ≈ 11 K. We also observed a non-Fermi liquid behavior near the quantum phase ransition point: the temperature (T) dependence of the electrical resistivity (ρ) in the paramagnetic region is ρ ∝ T 3=2 rather than ρ ∝ T 5=3 that is predicted at the quantum critical point. The T3=2 dependence is observed in some other itinerant-electron agnets, e.g., ZrZn2 and MnSi. We discuss the possible mechanisms applied to these compounds.

Original languageEnglish
Article number094713
Journaljournal of the physical society of japan
Volume87
Issue number9
DOIs
Publication statusPublished - 2018

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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