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|Type:||Artigo de periódico|
|Title:||Superconducting Diamagnetic Fluctuations For H ∥ Ab Planes In Yba2cu3o7-δ For Fields Up To 5 T|
|Author:||Salem-Sugui Jr. S.|
da Silva E.Z.
|Abstract:||Magnetic measurements for a twin-aligned single crystal of YBa2Cu3O7δ were performed from 80 K to 200 K for fixed applied fields (H) up to 5T, parallel to the ab planes of the crystal. Magnetic fields, from 0.05 T to 1 T, produced isofield M vs T curves which exhibit sharp transitions that unambiguously identify Tc. Above H = 2 T, a field-enhanced rounding starts to appear in the isofield M vs T curves. This rounding effect in the vicinity of Tc is interpreted as due to high field-induced fluctuations in the 3D order parameter. By using an appropriate scaling, the ΔT fluctuation regions for H = 2, 3T are obtained. © 1994.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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