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|Type:||Artigo de periódico|
|Title:||SUPERCONDUCTING DIAMAGNETIC FLUCTUATIONS FOR H-II-AB PLANES IN YBA2CU3O7-DELTA FOR FIELD UP TO 5-T|
|Abstract:||Magnetic measurements for a twin-aligned single crystal of YBa2CU307-delta 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 T(C). 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 T(C) is interpreted as due to high field-induced fluctuations in the 3D order parameter. By using an appropriate scaling, the DELTAT fluctuation regions for H = 2, 3 T are obtained.|
|Editor:||Pergamon-elsevier Science Ltd|
|Appears in Collections:||Artigos e Materiais de Revistas Científicas - Unicamp|
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