Ferromagnetic quantum critical point in UCo1-xFexGe

Abstract

We have carried out a comprehensive study of the UCo1-xFexGe series across the entire range of compositions 0 <= x <= 1, and report the results of x-ray diffraction, magnetization, specific heat, and electrical resistivity to uncover the T-x phase diagram. Substitution of Fe into UCoGe initially results in an increase in the Curie temperature and a rapid destruction of the superconductivity. Near x = 0.22, the ferromagnetic transition is suppressed to zero temperature at an apparent ferromagnetic itinerant electron quantum critical point, where the temperature dependence of the electrical resistivity and specific heat in this region reveal non-Fermi liquid behavior.

7 pages, 7 figures

References in corpus (5)

• Superconductivity on the border of weak itinerant ferromagnetism in UCoGe
• Evolution of critical scaling behavior near a ferromagnetic quantum phase transition
• Ferromagnetic quantum critical point in URhGe doped with Ru
• Suppression of ferromagnetism in CeSi_1.81 under temperature and pressure
• Simultaneous suppression of ferromagnetism and superconductivity in UCoGe by Si substitution