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dc.contributor.authorChen, TMen_US
dc.contributor.authorKao, FSen_US
dc.date.accessioned2014-12-08T15:01:36Z-
dc.date.available2014-12-08T15:01:36Z-
dc.date.issued1997-08-01en_US
dc.identifier.issn0022-4596en_US
dc.identifier.urihttp://dx.doi.org/10.1006/jssc.1997.7410en_US
dc.identifier.urihttp://hdl.handle.net/11536/426-
dc.description.abstractThe formation of phases in the (R1-xPrx)(2)Ba4Cu7O14+delta (Pr-doped R247; R = Nd, Eu, Tm) system with x = 0-1.0 was investigated. Samples of the title series were synthesized at 980-990 degrees C at 25 bar O-2, followed by annealing at 300 degrees C under 130 bar O-2 for 30 hr. Oxygen content of the samples has been determined by iodometric titration, Single-phased samples were obtained with x smaller than or equal to 0.3, 0.4, and 0.4 for R = Nd, Eu, and Tm, respectively, as indicated by X-ray diffraction measurements, With increasing amount of Pr substituting for R, the cell dimensions of the Pr-doped R247 phases were found to expand steadily, whereas the corresponding structural orthorhombicity was observed to decrease systematically. Superconducting transition temperatures (T-c's) of the title phases were found to be significantly suppressed upon Pr doping, as indicated by field-cooled temperature-dependent magnetization studies. The effect of Pr substitution on T-c's of R247 (R = Y, Eu, Er, Tm, Nd, Dy) phases was investigated and compared as a function of R3+ radii, but no size dependence effect was observed. In addition, field-dependent magnetization studies for a series of (Eu1-xPrx)(2)Ba4Cu7O14+delta samples with x = 0, 0.2, and 0.4, respectively, are also reported. (C) 1997 Academic Press.en_US
dc.language.isoen_USen_US
dc.titleThe high-pressure synthesis and characterization of some praseodymium-substituted rare-earth-based R2Ba4Cu7O14+delta (R = Nd, Eu, Tm)en_US
dc.typeArticleen_US
dc.identifier.doi10.1006/jssc.1997.7410en_US
dc.identifier.journalJOURNAL OF SOLID STATE CHEMISTRYen_US
dc.citation.volume132en_US
dc.citation.issue1en_US
dc.citation.spage73en_US
dc.citation.epage77en_US
dc.contributor.department交大名義發表zh_TW
dc.contributor.department應用化學系zh_TW
dc.contributor.departmentNational Chiao Tung Universityen_US
dc.contributor.departmentDepartment of Applied Chemistryen_US
dc.identifier.wosnumberWOS:A1997XY68900010-
dc.citation.woscount3-
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