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https://scholarbank.nus.edu.sg/handle/10635/96248
DC Field | Value | |
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dc.title | Dissipation near Tc in a textured (Bi,Pb)2Sr2Ca2Cu3Oy, silver-clad tape | |
dc.contributor.author | Han, G.C. | |
dc.contributor.author | Ong, C.K. | |
dc.date.accessioned | 2014-10-16T09:21:14Z | |
dc.date.available | 2014-10-16T09:21:14Z | |
dc.date.issued | 1997-11-01 | |
dc.identifier.citation | Han, G.C.,Ong, C.K. (1997-11-01). Dissipation near Tc in a textured (Bi,Pb)2Sr2Ca2Cu3Oy, silver-clad tape. Physical Review B - Condensed Matter and Materials Physics 56 (17) : 11299-11304. ScholarBank@NUS Repository. | |
dc.identifier.issn | 01631829 | |
dc.identifier.uri | http://scholarbank.nus.edu.sg/handle/10635/96248 | |
dc.description.abstract | The transport resistance R of a silver-clad Bi(2223) tape has been studied as a function of temperature T and magnetic field H in the case of the field applied parallel (H∥ab) and perpendicular (H∥c) to the tape plane in the region of temperature near Tc (T/Tc>0.9) and low fields below 2000 G. As observed in the low-temperature and high-field region, the broadening of the resistive transition [Tc(0)-Tc(H)] follows a power-law variation of the field, i.e., [Tc(0)-Tc(H)]∝Hq, where q is about 1/2 from the experimental result. The R(T) curves at various fields show an Arrhenius behavior for both H∥ab and H∥c. However, the activation energy U derived from the slope of the Arrhenius plot is more than one order of magnitude larger than usually reported. We think this large deviation of the U value is from the assumption of temperature-independent U in the Arrhenius law and find that a reasonable U value can be obtained through an improved Arrhenius plot by considering the dissipation as induced by the thermally activated flux flow in the vortex-liquid state. The anisotropy both in magnetoresistance curves R(H) and the irreversibility line Hirr(T) shows a scaling behavior as predicted by the effective-mass model, i.e., f∥c(H)=f∥ab(γH), where f can be either R or Tirr, γ is the anisotropy factor. From the scaling, γ is about 3.5. Such a small γ value for present sample suggests that the dissipation for H∥ab is dominated by the small-angle grain boundaries, as described in the railway-switch model. | |
dc.source | Scopus | |
dc.type | Article | |
dc.contributor.department | PHYSICS | |
dc.description.sourcetitle | Physical Review B - Condensed Matter and Materials Physics | |
dc.description.volume | 56 | |
dc.description.issue | 17 | |
dc.description.page | 11299-11304 | |
dc.description.coden | PRBMD | |
dc.identifier.isiut | NOT_IN_WOS | |
Appears in Collections: | Staff Publications |
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