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Article Dans Une Revue Physical Review B: Condensed Matter and Materials Physics (1998-2015) Année : 2012

High- field moment polarization in the ferromagnetic superconductor ucoge

Résumé

We report magnetization and magnetoresistivity measurements on the isostructural ferromagnetic superconductors UCoGe and URhGe in magnetic fields up to 60 T and temperatures from 1.5 to 80 K. At low temperature, a moment polarization in UCoGe in a field mu H-0 parallel to b of around 50 T leads to well-defined anomalies in both magnetization and magnetoresistivity. These anomalies vanish in temperatures higher than 30-40 K, where maxima in the magnetic susceptibility and the field-induced variation of the magnetoresistivity are found. A comparison is made between UCoGe and URhGe, where a moment reorientation in a magnetic field mu H-0 parallel to b of 12 T leads to field-induced reentrant superconductivity.

Dates et versions

hal-00755531 , version 1 (21-11-2012)

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William Knafo, T. D. Matsuda, D. Aoki, F. Hardy, Gernot Werner Scheerer, et al.. High- field moment polarization in the ferromagnetic superconductor ucoge. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2012, 86, pp.184416. ⟨10.1103/PhysRevB.86.184416⟩. ⟨hal-00755531⟩
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