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Anisotropic Critical Magnetic Fluctuations in the Ferromagnetic Superconductor UCoGe.
MedLine Citation:
PMID:  22107668     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
We report neutron scattering measurements of critical magnetic excitations in the weakly ferromagnetic superconductor UCoGe. The strong non-Landau damping of the excitations we observe, although unusual, has been found in another related ferromagnet, UGe_{2} at zero pressure. However, we also find that there is a significant anisotropy of the magnetic correlation length in UCoGe that contrasts with an almost isotropic length for UGe_{2}. The values of the magnetic correlation length and damping are found to be compatible with superconductivity on small Fermi-surface pockets. The anisotropy may be important to explain why UCoGe is a superconductor at zero pressure while UGe_{2} is not.
Authors:
C Stock; D A Sokolov; P Bourges; P H Tobash; K Gofryk; F Ronning; E D Bauer; K C Rule; A D Huxley
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Publication Detail:
Type:  Journal Article     Date:  2011-10-27
Journal Detail:
Title:  Physical review letters     Volume:  107     ISSN:  1079-7114     ISO Abbreviation:  Phys. Rev. Lett.     Publication Date:  2011 Oct 
Date Detail:
Created Date:  2011-11-23     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0401141     Medline TA:  Phys Rev Lett     Country:  United States    
Other Details:
Languages:  eng     Pagination:  187202     Citation Subset:  IM    
Affiliation:
NIST Center for Neutron Research, 100 Bureau Drive, Gaithersburg, Maryland 20899, USA and Indiana University, 2401 Milo B. Sampson Lane, Bloomington, Indiana 47404, USA.
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