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Type: Artigo de evento
Title: Critical Current Density Anisotropy Of Aligned Mgb2 Crystallites
Author: De Lima O.F.
Cardoso C.A.
Abstract: We have obtained the induced critical current density, Jc ∝ ΔM, with ΔM taken from hysteretic magnetization loops measured for temperatures between 5 and 35 K, in a sample of aligned MgB2 crystallites. We found an almost temperature independent ratio Jcab / Jcc ∼ 1.5, between the critical current density parallel and perpendicular to the ab planes. This latter result follows closely the expected dependence of Jcab / Jcc ≈ ξab/ξc ∼ 1.7, where ξab and ξc are the corresponding coherence length values. Uncertainties related to the evaluation of geometric factors and subtraction of a magnetic background are also discussed. © 2002 Elsevier Science B.V. All rights reserved.
Rights: fechado
Identifier DOI: 10.1016/S0921-4534(02)02190-1
Date Issue: 2003
Appears in Collections:Unicamp - Artigos e Outros Documentos

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