完整後設資料紀錄
DC 欄位語言
dc.contributor.authorCHEN, FHen_US
dc.contributor.authorHORNG, WCen_US
dc.contributor.authorHSU, HTen_US
dc.contributor.authorTSENG, TYen_US
dc.date.accessioned2014-12-08T15:03:31Z-
dc.date.available2014-12-08T15:03:31Z-
dc.date.issued1995-02-01en_US
dc.identifier.issn0896-1107en_US
dc.identifier.urihttp://dx.doi.org/10.1007/BF00732240en_US
dc.identifier.urihttp://hdl.handle.net/11536/2056-
dc.description.abstractThe field-cooled magnetization of high-T-c superconducting ceramics measured in low magnetic fields exhibits the paramagnetic Meissner effect (PME), i.e., the diamagnetic signal initially increases with decrease in temperature but reaches a maximum at temperature T-d and later decreases with decrease in temperature. Even in some samples the signal is ultimately able to transform inversely into a paramagnetic regime once the sample is cooled below a temperature T-p as long as the applied field is sufficiently small. This PME has been observed in various high-T-c cuprates and is explained by disparate aspects. An anisotropic model, in which the granular superconductors are assumed to be ideally anisotropic, was first alternatively proposed in the present work so as to theoretically account for this effect. On the other hand, an isotropic model, suitable for granular superconductors with randomly oriented grains, was proposed to deal with the samples prepared by a conventional solid-state reaction method. The anomalous magnetization behavior in the present model was demonstrated to be the superposition of the diamagnetic signal, which occurs as a result of the intragranular shielding currents, over the paramagnetic one due to the induction of the intergranular component induced by these currents where the intergranular one behaved as the efective pinning centers. The PME was demonstrated by this model to exist parasitically in granular superconductors. This intergranular effect is therefore worthy of remark when evaluating the volume fraction of superconductivity for the samples from the Meissner signal, in particular, at a low magnetic field.en_US
dc.language.isoen_USen_US
dc.subjectFIELD-COOLEDen_US
dc.subjectGRANULARen_US
dc.subjectPARAMAGNETIC MEISSNER EFFECTen_US
dc.subjectISOTROPICen_US
dc.subjectANISOTROPICen_US
dc.titlePARAMAGNETIC MEISSNER EFFECT OF HIGH-TEMPERATURE GRANULAR SUPERCONDUCTORS - INTERPRETATION BY ANISOTROPIC AND ISOTROPIC MODELSen_US
dc.typeArticleen_US
dc.identifier.doi10.1007/BF00732240en_US
dc.identifier.journalJOURNAL OF SUPERCONDUCTIVITYen_US
dc.citation.volume8en_US
dc.citation.issue1en_US
dc.citation.spage43en_US
dc.citation.epage56en_US
dc.contributor.department電子工程學系及電子研究所zh_TW
dc.contributor.departmentDepartment of Electronics Engineering and Institute of Electronicsen_US
dc.identifier.wosnumberWOS:A1995RD07800010-
dc.citation.woscount4-
顯示於類別:期刊論文