Neutron scattering study of the ferromagnetic superconductor UGe2

N. Kernavanois; B. Grenier; A. Huxley; E. Ressouche; J. P. Sanchez; J. Flouquet

doi:10.1103/PhysRevB.64.174509

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Neutron scattering study of the ferromagnetic superconductor UGe2

N. Kernavanois, B. Grenier, A. Huxley, E. Ressouche, J. P. Sanchez, J. Flouquet

DOI 10.1103/PhysRevB.64.174509 · Physical Review B

T1

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Abstract

Unpolarized and polarized neutron scattering experiments have been performed at ambient pressure on a single crystal of the itinerant electron superconductor UGe2 in both the ferromagnetic and the paramagnetic phases. Unpolarized neutrons have confirmed the ZrGa2-type orthorhombic crystal structure of UGe2 and a ferromagnetic ordering below TC=53 K with the moments aligned along the a axis. No evidence of any modulated component for the magnetic structure has been found. Polarized neutron data have shown a large and almost spherical magnetization distribution at the U sites and no induced moment at the Ge sites. Refinements of the magnetic structure factors within the dipolar approximation allow the magnitude of the orbital and spin uranium moments to be quantified, and a comparison to the measured static magnetization reveals that there is no diffuse contribution.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
UGe2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	0.8	1.2 GPa	unknown