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)


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
Issue number9
Publication statusPublished - 2018

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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