New superconducting Pb-based 1212 cuprates containing boron, (Pb0.5B0.5)(Sr2-xaBax )(Y1-yCay)Cu2Oz

New superconducting layered cuprates of the 1212 phase have been synthesized in the (Pb0.5B0.5)(Sr2-xBax)(Y1-yCay)Cu2Oz system. X-ray diffraction study shows that the almost-single phase samples are obtained within a region of 0 x 0.6 and 0 y 0.6. Then, the sample with x = 0.5 and y = 0.6 among them...

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Veröffentlicht in:	Physica. C, Superconductivity Superconductivity, 2008-06, Vol.468 (11-12), p.925-928
Hauptverfasser:	SASAKURA, Hiroyuki, AKAGI, Yoshiya, TSUKUI, Shigeki, ADACHI, Motoaki
Format:	Artikel
Sprache:	eng
Schlagworte:	Condensed matter: electronic structure, electrical, magnetic, and optical properties Condensed matter: structure, mechanical and thermal properties Effects of material synthesis, crystal structure, and chemical composition Exact sciences and technology Inorganic compounds Physics Structure of solids and liquids crystallography Structure of specific crystalline solids Superconductivity Transition temperature variations
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Beschreibung
Zusammenfassung:	New superconducting layered cuprates of the 1212 phase have been synthesized in the (Pb0.5B0.5)(Sr2-xBax)(Y1-yCay)Cu2Oz system. X-ray diffraction study shows that the almost-single phase samples are obtained within a region of 0 x 0.6 and 0 y 0.6. Then, the sample with x = 0.5 and y = 0.6 among them is found to have the maximum superconducting transition temperature of about 45 K. The crystal structure of this sample has a tetragonal symmetry with the lattice parameters of a = 0.3826 nm and c = 1.195 nm.
ISSN:	0921-4534 1873-2143
DOI:	10.1016/j.physc.2008.04.003