Fermi surface and critical field of YBCO

We have measured extremal areas of the Fermi surface of YBa 2Cu 3O 6.97 by the de Haas-van Alphen effect and the superconducting critical field H c2 ( T) by resistence measurements on epitaxial thin of films YBa 2Cu 3O 7 (both called YBCO). Magnetic fields up to 140T were used in flux compression ex...

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Bibliographic Details
Published in:Physica. B, Condensed matter Condensed matter, 1993-05, Vol.186, p.104-106
Main Authors: Smith, J.L., Fowler, C.M., Freeman, B.L., Hults, W.L., King, J.C., Mueller, F.M., Rickel, D.G., Brooks, J.S., Goettee, J.D., Mankiewich, P.M., de Obaldia, E.I., Skocpol, W.J., O'Malley, M.L.
Format: Article
Language:English
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Summary:We have measured extremal areas of the Fermi surface of YBa 2Cu 3O 6.97 by the de Haas-van Alphen effect and the superconducting critical field H c2 ( T) by resistence measurements on epitaxial thin of films YBa 2Cu 3O 7 (both called YBCO). Magnetic fields up to 140T were used in flux compression experiments. We have tentatively identified another piece of the Fermi surface with an area of 22kT, which is larger than expected. By both the de Haas-van Alphen effect and the resistance measurements, H c2 with the applied magnetic field H parallel to the c axis of the YBCO is near 130 T. For H perpendicular to the c axis H c2 is of the order of 900 T.
ISSN:0921-4526
1873-2135
DOI:10.1016/0921-4526(93)90506-2