Evidence for superconductivity above 40 K in the La-Ba-Cu-O compound system
C. W. ChuDepartment of Physics and Magnetic Information Research Laboratory, University of Houston, Houston, Texas 77004P. H. HorDepartment of Physics and Magnetic Information Research Laboratory, University of Houston, Houston, Texas 77004R. L. MengDepartment of Physics and Magnetic Information Research Laboratory, University of Houston, Houston, Texas 77004Li GaoDepartment of Physics and Magnetic Information Research Laboratory, University of Houston, Houston, Texas 77004Z. J. HuangDepartment of Physics and Magnetic Information Research Laboratory, University of Houston, Houston, Texas 77004and Y. Q. WangDepartment of Physics and Magnetic Information Research Laboratory, University of Houston, Houston, Texas 77004
1987en
ABI
Аннотация
An apparent superconducting transition with an onset temperature above 40 K has been detected under pressures in the La-Ba-Cu-O compound system synthesized directly from a solid-state reaction of ${\mathrm{La}}_{2}$${\mathrm{O}}_{3}$, CuO, and ${\mathrm{BaCO}}_{3}$ followed by a decomposition of the mixture in a reduced atmosphere. The experiment is described and the results of effects of magnetic field and pressure are discussed.
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