Anisotropic Magnetic Fluctuations and Superconductivity in Ferromagnetic Superconductor UCoGe

We have performed 59Co NQR / NMR measurements on the single-crystalline UCoGe, in order to investigate the relationship between ferromagnetism and superconductivity. The measurements of Knight-shift and nuclear spin-lattice relaxation rate provide clear evidence that both static and dynamic suscepti...

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Bibliographic Details
Published in:Journal of physics. Conference series 2012-12, Vol.391 (1), p.12017-4
Main Authors: Hattori, T, Ihara, Y, Karube, K, Nakai, Y, Ishida, K, Deguchi, K, Sato, N K, Satoh, I
Format: Article
Language:English
Subjects:
Anisotropy
Dynamics
Ferromagnetism
Fluctuation
Ising model
Magnetic variations
Magnetization
NMR
Nuclear magnetic resonance
Nuclear spin
Physics
Single crystals
Spin-lattice relaxation
Superconductivity
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Summary:We have performed 59Co NQR / NMR measurements on the single-crystalline UCoGe, in order to investigate the relationship between ferromagnetism and superconductivity. The measurements of Knight-shift and nuclear spin-lattice relaxation rate provide clear evidence that both static and dynamic susceptibilities are ferromagnetic with Ising anisotropy. In addition, Hc2 also shows extremely large anisotropy which can not be explained by the GL model with anisotropy of effective mass. These data suggest intimate relationship between Ising magnetization and anisotropic superconductivity in UCoGe.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/391/1/012017