A pulsed transport technique has been used to measure the zero-field critical current densities of YBa2Cu3O 7 ceramic superconductors prepared under different sintering conditions. This low duty-cycle, pulsed technique, used on specially prepared samples with low-resistance current contacts, allows one to determine the entire superconducting/normal phase boundary without the problems associated with sample heating. The results can be interpreted in terms of two different critical-current densities. The intergrain critical current is low and is limited by the weak links between the grains; the intrinsic intragrain critical current is greater than 104 A/cm2 at 77 K. Critical-current values inferred from magnetic hysteresis measurements made on the same samples agree with the intrinsic intragrain critical currents obtained using the pulsed transport technique. In addition, the magnetization-derived critical-current density has been determined for the high Tc phase Bi2Sr2Ca2Cu3O10+δ at 77 K

Samples of Bi2Sr2Can−1CunO2n+4 have been prepared in both the n=2 (80 K) phase and the n=3 (105 K) phase. For both phases, 5 mol-% of the copper has been replaced with the transition elements Ti, V, Mn, Fe, Co, Ni, and Zn. X-ray diffraction data show that the n=2 structure still forms with all of these substitutions. The n=3 structure will form the Ti, V, Mn, and Zn substitutions, but not with the Fe, Co, or Ni. The measured change in lattice parameters correlates with the substituent's ionic radii, indicating incorporation into the structure. Resistivity and magnetization data show marked differences in Tc for the various replacements. Moreover, the resistivity indicates uniform substitution for the n=2 phase samples, but non-uniform substitution for those in the n=3 phase.

A pulsed transport technique has been used to measure the zero-field critical current densities of YBa/sub 2/Cu/sub 3/O/sub 7/ ceramic superconductors prepared under different sintering conditions. This low duty-cycle, pulsed technique, used on specially prepared samples with low-resistance current contacts, allows one to determine the entire superconducting/normal phase boundary without the problems associated with sample heating. The results can be interpreted in terms of two different critical-current densities. The intergrain critical current is low and is limited by the weak links between the grains; the intrinsic intragrain critical current is greater than 10/sup 4/ A/cm/sup 2/ at 77 K. Critical-current values inferred from magnetic hysteresis measurements made on the same samples agree with the intrinsic intragrain critical currents obtained using the pulsed transport technique. In addition, the magnetization-derived critical-current density has been determined for the high T/sub c/ phase Bi/sub 2/Sr/sub 2/Ca/sub 2/Cu/sub 3/O/sub 10+ delta / at 77 K.< >

Chemischer InformationsdienstVolume 13, Issue 1 Physical Organic Chemistry ChemInform Abstract: RAMAN SPECTROSCOPY OF EXCITED ELECTRONIC STATES OF PHOTOACTIVE METAL COMPLEXES. 1. NITROPRUSSIDE ION J. W. SCHINDLER, J. W. SCHINDLERSearch for more papers by this authorJ. I. ZINK, J. I. ZINKSearch for more papers by this author J. W. SCHINDLER, J. W. SCHINDLERSearch for more papers by this authorJ. I. ZINK, J. I. ZINKSearch for more papers by this author First published: January 5, 1982 https://doi.org/10.1002/chin.198201049Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinked InRedditWechat No abstract is available for this article. Volume13, Issue1January 5, 1982 RelatedInformation

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotophysics of aqueous tetracyanoplatinate(2-)John W. Schindler, Robert C. Fukuda, and Arthur W. AdamsonCite this: J. Am. Chem. Soc. 1982, 104, 13, 3596–3600Publication Date (Print):June 1, 1982Publication History Published online1 May 2002Published inissue 1 June 1982https://pubs.acs.org/doi/10.1021/ja00377a010https://doi.org/10.1021/ja00377a010research-articleACS PublicationsRequest reuse permissionsArticle Views383Altmetric-Citations70LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose Get e-Alerts

Chemischer InformationsdienstVolume 13, Issue 42 Physical Organic Chemistry ChemInform Abstract: PHOTOPHYSICS OF AQUEOUS TETRACYANOPLATINATE(2-) J. W. SCHINDLER, J. W. SCHINDLERSearch for more papers by this authorR. C. FUKUDA, R. C. FUKUDASearch for more papers by this authorA. W. ADAMSON, A. W. ADAMSONSearch for more papers by this author J. W. SCHINDLER, J. W. SCHINDLERSearch for more papers by this authorR. C. FUKUDA, R. C. FUKUDASearch for more papers by this authorA. W. ADAMSON, A. W. ADAMSONSearch for more papers by this author First published: October 19, 1982 https://doi.org/10.1002/chin.198242045AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinkedInRedditWechat No abstract is available for this article. Volume13, Issue42October 19, 1982 RelatedInformation

: Samples of the bismuth based high temperature superconducting family Bi2Sr2Can-1CunO2n+4 delta have been prepared and characterized by x-ray diffraction, and temperature-dependent resistivity and thermoelectric power measurements. Both of the high temperature superconducting phases reported in the literature, with transition temperatures near 80K and 110K, have been observed. Evidence from thermoelectric power measurements is presented which shows that this family of ceramic superconductors has contributions to the electrical transport that is both electron-like and hole-like. However, all of the superconducting transitions observed involve hole-like states. Thin films, superconductivity, ceramic, Copper oxides, Bismuth compounds, Strontium compounds, Calcium, Reprints.