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Effect of sulfur on the superconductivity of RBa/sub 2/Cu/sub 3/O/sub 7/

Journal Article · · Phys. Rev. B: Condens. Matter; (United States)
The single-phase high-T/sub c/ superconductor RBa/sub 2/Cu/sub 3/O/sub 6/S R = Nd, Eu, Gd, Y, Er have been prepared and studied by x-ray diffraction and dc magnetometry. For Gd and Y the compounds with sulfur have a larger unit cell and yet have the same T/sub c/. For R = Eu, Nd substitution of 1 oxygen by sulfur suppresses T/sub c/ and causes the crystal structure to change from orthorhombic to tetragonal. TbBa/sub 2/Cu/sub 3/O/sub 7/..sqrt../sub x/S/sub x/, x = 0,1 systems crystallize in a perovskite-related cubic structure and are neither superconducting nor magnetically ordered down to 2 K. The sulfur oxidizes the Tb so that it is tetravalent
Research Organization:
Laboratorie L. Neel, 166X Grenoble, France
OSTI ID:
5255228
Journal Information:
Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 37:10; ISSN PRBMD
Country of Publication:
United States
Language:
English

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