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Zoekopdracht: journal id: "physicalxreviewxb"

AuteursK. Prokeš, A. de Visser, Y.K. Huang, B. Fåk, E. Ressouche
TitelAnomalous spin distribution in the superconducting ferromagnet UCoGe studied by polarized neutron diffraction
TijdschriftPhysical Review B
Jaargang81
Jaar2010
Nummer18
Pagina's180407(R)-
ISSN10980121
FaculteitFaculteit der Natuurwetenschappen, Wiskunde en Informatica
Instituut/afd.FNWI: Van der Waals-Zeeman Institute (WZI)
SamenvattingWe report a polarized neutron-diffraction study conducted to reveal the nature of the weak ferromagnetic moment in the superconducting ferromagnet UCoGe. We find that the ordered moment in the normal phase in low magnetic fields (B∥c) is predominantly located at the U atom and has a magnitude of ∼0.1μB at 3 T, in agreement with bulk magnetization data. By increasing the magnetic field the U moment grows to ∼0.3μB in 12 T and most remarkably, induces a substantial moment (∼0.2μB) on the Co atom directed antiparallel to the U moment. The anomalous polarizability of the Co 3d orbitals is unique among uranium intermetallics and might reflect the proximity to a magnetic quantum critical point of UCoGe in zero field.
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