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Article: The synthesis and characterization of HgBa2Ca2Cu3O8+δ superconductors with substitution of Hg by Pb

TitleThe synthesis and characterization of HgBa2Ca2Cu3O8+δ superconductors with substitution of Hg by Pb
Authors
Issue Date1995
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/physc
Citation
Physica C: Superconductivity and its Applications, 1995, v. 246 n. 3-4, p. 207-215 How to Cite?
Persistent Identifierhttp://hdl.handle.net/10722/81019
ISSN
2015 Impact Factor: 0.835
2015 SCImago Journal Rankings: 0.472
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorShao, HMen_HK
dc.contributor.authorLam, CCen_HK
dc.contributor.authorFung, PCWen_HK
dc.contributor.authorWu, XSen_HK
dc.contributor.authorDu, JHen_HK
dc.contributor.authorShen, GJen_HK
dc.contributor.authorChow, JCLen_HK
dc.contributor.authorHo, SLen_HK
dc.contributor.authorHung, KCen_HK
dc.contributor.authorYao, XXen_HK
dc.date.accessioned2010-09-06T08:12:50Z-
dc.date.available2010-09-06T08:12:50Z-
dc.date.issued1995en_HK
dc.identifier.citationPhysica C: Superconductivity and its Applications, 1995, v. 246 n. 3-4, p. 207-215en_HK
dc.identifier.issn0921-4534en_HK
dc.identifier.urihttp://hdl.handle.net/10722/81019-
dc.languageengen_HK
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/physcen_HK
dc.relation.ispartofPhysica C: Superconductivity and its Applicationsen_HK
dc.rightsPhysica C: Superconductivity and its Applications. Copyright © Elsevier BV.en_HK
dc.titleThe synthesis and characterization of HgBa2Ca2Cu3O8+δ superconductors with substitution of Hg by Pben_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0921-4534&volume=246&spage=207&epage=215&date=1995&atitle=The+synthesis+and+characterization+of+HgBa2Ca2Cu2O8+d+superconductors+with+substitution+of+Hg+by+Pben_HK
dc.identifier.emailFung, PCW: hrspfcw@hku.hken_HK
dc.identifier.doi10.1016/0921-4534(95)00153-0-
dc.identifier.scopuseid_2-s2.0-58149326417-
dc.identifier.hkuros20481en_HK
dc.identifier.isiWOS:A1995RA41000002-
dc.deduplication.noteWe have successfully fabricated ceramic superconductors of Hg-1223 with substitution of Pb for Hg, i.e. Hg1-xPbxBa2Ca2Cu3Oy, by using encapsulation and short time annealing techniques. Samples fabricated in this manner may have nearly single phase structure and some enhancement of Tc can be achieved through this method. The materials of this ceramic with x ranging from 0 to 0.5 exhibit high-temperature superconductivity at temperatures falling in the range from 103 to 135 K. The sample with optimum doping of Pb of x = 0.34 and ° = 0.40 has a highest Tc of 135 K, and its diamagnetic onset temperature Tc dia = 143 K. The composition of this sample has been found experimentally and is specified by a formula of Hg0.66Pb0.34Ba2Ca1.98O8.4. The valence number for the copper constituent is given by VCu = 2.30. X-ray diffraction (XRD), transmission electron microscope (TEM) and electron probe microanalyzer (EPMA) analyses have been carried out for detailed investigation. Results indicate that the critical temperature for samples which were post-annealed with either oxygen flow or in high pressure of oxygen gas was increased, while that for those annealed in argon flow was decreased. Furthermore, the as-prepared samples were slightly in the under-doped state with respect to the vacancy. It was shown that Tc parabolically depends on the valence state of copper. © 1995.-

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