File Download

There are no files associated with this item.

  Links for fulltext
     (May Require Subscription)
Supplementary

Article: TEM observation of intergrowth structures in the HgBa2Ca2Cu3Oy ceramic superconductor

TitleTEM observation of intergrowth structures in the HgBa2Ca2Cu3Oy ceramic superconductor
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. 247 n. 1-2, p. 43-54 How to Cite?
AbstractIntergrowth structures, which occur in the HgBa2Ca2Cu3Oy ceramic superconductor, were observed by means of transmission electron microscopy (TEM). There are at least two types of intergrowth structure: Hg-1212/Hg-1223 and Hg-1223/Hg-1234. The congruence relationships for these intergrowth structures are respectively: 〈1 1 0〉Hg-1212|〈1 1 0〉Hg-1223, {0 0 1}Hg-1212|{0 0 1}Hg-1223; and 〈1 1 0〉Hg-1223|〈1 1 0〉Hg-1234, {0 0 1}Hg-1223|{0 0 1}Hg-1234. For a stable intergrowth structure, the total strain energy density should have a minimum value. The strain energy density consists of two parts: the tensile strain energy density Ut and the shear strain energy density Us. The tensile strain energy density Ut stored in the crystal can be expressed in terms of the ratio between the numbers of matching slabs, i.e. fi = Ni/N, where Ni is the number of slabs corresponding to Hg-12(ni−1)ni, and N is the number of slabs corresponding to the matrix, i.e. Hg-12(n−1)n. The plots of Ut vs. fi = 1.2498 and fi = 0.8272 for intergrowth structures of Hg-1212/Hg-1223 and Hg-1234/Hg-1223, respectively. As was observed from the TEM micrograph, two immobile dislocations can be created by an appropriate combination of intergrowth structures of Hg-1212/Hg-1223 and Hg-1223/Hg-1234. A model for the formation of these immobile dislocations is presented. Copyright © 1995 Published by Elsevier B.V.
Persistent Identifierhttp://hdl.handle.net/10722/80880
ISSN
2015 Impact Factor: 0.835
2015 SCImago Journal Rankings: 0.472
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorLam, CCen_HK
dc.contributor.authorWang, SDen_HK
dc.contributor.authorShao, HMen_HK
dc.contributor.authorShen, GJen_HK
dc.contributor.authorChow, JCLen_HK
dc.contributor.authorFung, PCWen_HK
dc.contributor.authorHo, SLen_HK
dc.contributor.authorLai, HYen_HK
dc.contributor.authorHung, KCen_HK
dc.date.accessioned2010-09-06T08:11:17Z-
dc.date.available2010-09-06T08:11:17Z-
dc.date.issued1995en_HK
dc.identifier.citationPhysica C: Superconductivity and its Applications, 1995, v. 247 n. 1-2, p. 43-54en_HK
dc.identifier.issn0921-4534en_HK
dc.identifier.urihttp://hdl.handle.net/10722/80880-
dc.description.abstractIntergrowth structures, which occur in the HgBa2Ca2Cu3Oy ceramic superconductor, were observed by means of transmission electron microscopy (TEM). There are at least two types of intergrowth structure: Hg-1212/Hg-1223 and Hg-1223/Hg-1234. The congruence relationships for these intergrowth structures are respectively: 〈1 1 0〉Hg-1212|〈1 1 0〉Hg-1223, {0 0 1}Hg-1212|{0 0 1}Hg-1223; and 〈1 1 0〉Hg-1223|〈1 1 0〉Hg-1234, {0 0 1}Hg-1223|{0 0 1}Hg-1234. For a stable intergrowth structure, the total strain energy density should have a minimum value. The strain energy density consists of two parts: the tensile strain energy density Ut and the shear strain energy density Us. The tensile strain energy density Ut stored in the crystal can be expressed in terms of the ratio between the numbers of matching slabs, i.e. fi = Ni/N, where Ni is the number of slabs corresponding to Hg-12(ni−1)ni, and N is the number of slabs corresponding to the matrix, i.e. Hg-12(n−1)n. The plots of Ut vs. fi = 1.2498 and fi = 0.8272 for intergrowth structures of Hg-1212/Hg-1223 and Hg-1234/Hg-1223, respectively. As was observed from the TEM micrograph, two immobile dislocations can be created by an appropriate combination of intergrowth structures of Hg-1212/Hg-1223 and Hg-1223/Hg-1234. A model for the formation of these immobile dislocations is presented. Copyright © 1995 Published by Elsevier B.V.-
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.titleTEM observation of intergrowth structures in the HgBa2Ca2Cu3Oy ceramic superconductoren_HK
dc.typeArticleen_HK
dc.identifier.emailFung, PCW: hrspfcw@hku.hken_HK
dc.identifier.doi10.1016/0921-4534(95)00181-6-
dc.identifier.scopuseid_2-s2.0-0029309958-
dc.identifier.hkuros3379en_HK
dc.identifier.volume247-
dc.identifier.issue1-2-
dc.identifier.spage43-
dc.identifier.epage54-
dc.identifier.isiWOS:A1995RE73200004-
dc.publisher.placeNetherlands-

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats