Preparation of the oxypnictides and studies on their superconductivity

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dc.creatorKawabata, Ayaka
dc.creatorLee, Sang Chul
dc.creatorMoyoshi, Taketo
dc.creatorKobayashi, Yoshiaki
dc.creatorSato, Masatoshi
dc.date2008-08-21
dc.date2008-08-24
dc.date.accessioned2026-07-07T13:15:45Z
dc.date.available2026-07-07T13:15:45Z
dc.descriptionLaFe1-yCoyAsO1-xFx (x=0.11) with various y values were prepared and their electrical resistivities, superconducting diamagnetisms and Hall coefficients have been measured. 75As- and 135La-NMR studies have also been carried out In spite of the successful Co-doping, we have not found any meaningful correlation of Tc with y, which indicates that the Tc-suppression by Co-doping is considered not to be so significant as expected for superconductors with nodes. Even for superconductors without nodes, it may not be easy to expect this small effect on Tc, if there are two different (disconnected) Fermi surfaces whose order parameters have opposite signs. The data of the NMR Knight shift indicate that the Cooper pairs are in the singlet state and the spin susceptibility is almost fully suppressed at low temperature.
dc.description2 pages, 4 fiures, submitted to JPSJ supplement, corrected typos
dc.identifierhttps://arxiv.org/abs/0808.2912
dc.identifierhttp://arxiv.org/abs/0808.2912
dc.identifierJ. Phys. Soc. Jpn. 77 (2008) Suppl. C 147.
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/230571
dc.subjectSuperconductivity
dc.subjectStrongly Correlated Electrons
dc.titlePreparation of the oxypnictides and studies on their superconductivity
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