Pressure-phase diagram of UCoGe by ac-susceptibility and resistivity measurements

E. Hassinger, D. Aoki, G. Knebel, J. Flouquet

研究成果: Conference article査読

14 被引用数 (Scopus)

抄録

UCoGe is one of the few compounds showing the coexistence of ferromagnetism and superconductivity at ambient pressure. With TCurie = 3K and TSC = 0.6 K it is near a quantum phase transition; the pressure needed to suppress the magnetism is slightly higher than 1 GPa. We report simultaneous resistivity and ac-susceptibility measurements under pressure on a polycrystal with very large single-crystalline domains and a resistivity ratio of about 6. Both methods confirm the phase diagram established before by resistivity measurements on a polycrystal. The ferromagnetic phase is suppressed for P ≈ 1.2 GPa. Astonishingly, the superconductivity persists at pressures up to at least 2.4 GPa. In other superconducting and ferromagnetic heavy fermion compounds like UGe2 and URhGe, the superconducting state is situated only inside the larger ferromagnetic region. Therefore, UCoGe seems to be the first example where superconductivity extends from the ferromagnetic to the paramagnetic region.

本文言語English
論文番号012055
ジャーナルJournal of Physics: Conference Series
200
SECTION 1
DOI
出版ステータスPublished - 2010
外部発表はい

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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