Small Angle Neutron Scattering Studies of the Vortex Lattice in theUPt3Mixed State: Direct Structural Evidence for theB→CTransition

Autor:	Collin Broholm, Ernst Bucher, G. Aeppli, U. Yaron, Peter Schiffer, Peter Ledel Gammel, Kell Mortensen, Gregory S. Boebinger, David J. Bishop
Rok vydání:	1997
Předmět:	Superconductivity Physics Condensed matter physics Condensed Matter::Superconductivity Neutron diffraction General Physics and Astronomy Field dependence Small-angle scattering Penetration depth Small-angle neutron scattering Coherence length Magnetic field
Zdroj:	Physical Review Letters. 78:3185-3188
ISSN:	1079-7114 0031-9007
Popis:	Small angle neutron scattering studies of the flux line lattice (FLL) in UPt3 for fields H⊥c provide direct microscopic evidence for the 5 kOe B→C transition. We find a pronounced maximum in the longitudinal correlation length of the FLL at the transition and an abrupt change in the field dependence of the scattered intensity which can be interpreted as a 15% decrease in the coherence length and a 9% increase in the penetration depth, consistent with discontinuities in the critical fields. Finally, in the low field phase, the FLL distortion evolves roughly linearly with field, while in the high field phase it appears to be less field dependent.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::75016565031108040a3f4faf1bffa7e6 https://doi.org/10.1103/physrevlett.78.3185 Zobrazit plný text záznamu