In:
Acta Physica Sinica, Acta Physica Sinica, Chinese Physical Society and Institute of Physics, Chinese Academy of Sciences, Vol. 43, No. 9 ( 1994), p. 1517-
Abstract:
The magnetic hysteresis and relaxation behaviors in YBa2Cu3O7-δ and Y0.9Eu0.1Ba2Cu3O7-δ samples were measured in the wide ranges of temperature (4.2-80K) and field (0-8 T). The M(t), Jc(T) and Ueff(J) relationships in these samples were studied and several theoretical models were tested. The results show:(1)Both the effective pinning energy and critical current density in the absence of flux creep are obviously higher in Y0.9Eu0.1Ba2Cu3O7-δ than in YBa2Cu3O7-δ sample, which indicates the introductions of new pinning centers with larger pinning energy by the partial substitution of Eu for Y. (2) Compared with other models, the collective flux creep theory gives the best description on our experimental results and thus this work provides a new experimental evidence for this theory.
Type of Medium:
Online Resource
ISSN:
1000-3290
,
1000-3290
Language:
Unknown
Publisher:
Acta Physica Sinica, Chinese Physical Society and Institute of Physics, Chinese Academy of Sciences
Publication Date:
1994
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