Details

Autor(en) / Beteiligte

• Evetts, J E
• Glowacki, B A
• Sampson, P L
• Blamire, M G
• McN.Alford, N
• Harmer, M A

Titel

Relation of the n-value of the resistive transition to microstructure and inhomogeneity for YBa sub(2)Cu sub(3)O sub(7)

Ist Teil von

• IEEE transactions on magnetics, 1989-01, Vol.25 (2), p.2041-2044

Erscheinungsjahr

1989

Quelle

IEEE Electronic Library Online

Beschreibungen/Notizen

• Measurements are reported of resistive transitions at 77 K for a series of YBa sub(2)Cu sub(3)O sub(7) wires as a function of applied magnetic field. The n-value is observed to fall with increasing applied magnetic field and shows strong hysteresis related to trapped flux when the field is cycled. The variation of both critical current and n-value with applied field is related to the microstructure of wires with different additives, and on a series of wires of different bulk density prepared using viscous processing techniques. Extensions to the analysis for conventional composites makes it possible to relate the n-value to the statistical critical current distribution.