Low temperature specific heat of polycrystalline UGe2 at high pressure

R. Vollmer, C. Pfleiderer, H. V. Löhneysen, E. D. Bauer, M. B. Maple

Research output: Contribution to journalConference articlepeer-review

9 Scopus citations


In UGe2, superconductivity in coexistence with ferromagnetism is observed in single crystal (Nature 406 (2000) 587; Phys. Rev. B 63 (2001) 144519) and polycrystalline samples (J. Phys. Condens. Matter 13 (2001) L759) just below the pressure pc ≈ 16 kbar for which the Curie temperature TC drops to zero. We present measurements of the specific heat C in the range 0.1-2.5 K on polycrystalline samples up to 14.7 kbar. The linear coefficient of the specific heat, γ = C/T, increases as a function of pressure and is the highest in the p-range where superconductivity is observed. In the superconducting state the AC magnetic susceptibility exhibits strong diamagnetic shielding. The specific heat displays an anomaly that is indicative of a bulk superconducting transition of order 15-20% by volume. The observed properties reflect an intricate interplay of the coexistence of ferromagnetism and superconductivity in UGe2.

Original languageEnglish
Pages (from-to)112-114
Number of pages3
JournalPhysica B: Condensed Matter
StatePublished - Mar 2002
Externally publishedYes
EventInternational Conference on Strongly Correlated Electrons - Ann Arbor, MI, United States
Duration: 6 Aug 20026 Aug 2002


  • Ferromagnetism
  • Specific heat
  • Superconductivity
  • UGe


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