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|Type:||Artigo de evento|
|Title:||Critical Current Density Anisotropy Of Aligned Mgb2 Crystallites|
|Author:||De Lima O.F.|
|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.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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