Effect of lead addition to Bi-based 2222 superconducting cuprates Bi2-xPbxSr2(Y, Ce)2Cu2O10+δ期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

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Effect of lead addition to Bi-based 2222 superconducting cuprates Bi_2-xPb_xSr₂(Y, Ce)₂Cu₂O_10+δ

Authors:	H B Liu X D Chen X P Jiang D E MorrisA P B Sinha

Institution:	Morris Research Inc., 1918 University Ave., Berkeley, CA 94704, USA Department of Materials Science, University of California, Berkeley, CA 94720, USA

Abstract:	Bi_2-xPb_xSr₂(Y, Ce)₂Cu₂O_10+δ, a new family of lead containing Bi-2222 compounds has been synthesized and effects of annealing in high pressure of oxygen studied. Lead-free Bi₂Sr₂(Y, Ce)₂Cu₂O_10+δ synthesized under flowing oxygen is known to be non-superconducting, but annealing under high oxygen pressure (100 bar) at 500°C, induced superconductivity with T_c=25 K. On substitution of lead (x>0.4), the superconductivity appears even in samples synthesized under flowing oxygen (1 bar). T_c increases with oxygen annealing pressure for all compositions, and it also increases with Pb content at a given oxygen pressure. These findings are discussed.

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