Pressure-induced quantum critical point in ferromagnet U4Ru 7Ge6

Hiroyuki Hidaka, Sosuke Takahashi, Yusei Shimizu, Tatsuya Yanagisawa, Hiroshi Amitsuka

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5 Citations (Scopus)


The electrical resistivity ρ of the ferromagnet U4Ru 7Ge6 has been studied under high pressure up to ∼ 4.5 GPa by using an indenter-type high-pressure cell. The Curie temperature T C = 11.2 K at ambient pressure decreases monotonously with increasing pressure, and seems to disappear at ∼ 2.6 GPa, where an enhancement of the coefficient A assuming Fermi liquid regime is observed. This result indicates a presence of a quantum critical point (QCP) of U4Ru7Ge 6 at around 2.6 GPa. In addition, non-Fermi liquid behavior (ρ ∼ T5/3) predicted by the SCR theory of three dimensional ferromagnet is also observed near the QCP.

Original languageEnglish
Article numberSA102
JournalJournal of the Physical Society of Japan
Issue numberSUPPL. A
Publication statusPublished - 2011 Jul


  • Ferromagnetism
  • Quantum critical point
  • URuGe


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