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

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Cited by in corpus (10)

• Metallic Quantum Ferromagnets
• Itinerant ferromagnetism in actinide 5f electrons system: Phenomenological analysis with spin fluctuation theory
• Itinerant origin of the ferromagnetic quantum critical point in Fe(Ga,Ge)3
• Switching of magnetic ground states across the UIr1-xRhxGe alloy system
• Quantum critical scaling in the disordered itinerant ferromagnet UCo${}_{1-x}$Fe${}_x$Ge
• Evolution of ferromagnetic and non-Fermi liquid state with doping:the case of Ru doped UCoGe
• Ferromagnetic Quantum Critical Point in CePd${}_2$P${}_2$ with Pd $\to$ Ni Substitution
• Effect of Pressure on Magnetism of UIrGe
• Electronic relaxation rates in metallic ferromagnets
• Collinear antiferromagnetic order in URu${}_2$Si${}_{2-x}$P${}_x$ revealed by neutron diffraction