Abnormal frequency dependence of ac susceptibility in melt texture Gd-Ba-Cu-O single domain

作者：Xu Ke Xi^*; Wu Xing Da; Pan Peng Jun

来源：Applied Physics Letters, 2009, 95(7): 072502.

DOI：10.1063/1.3206657

• barium compounds
• flux pinning
• gadolinium compounds
• high-temperature superconductors
• magnetic susceptibility

In this paper, the pinning property of the melt texture Gd-Ba-Cu-O single domain has been examined by ac susceptibility measurements. An unexpected frequency dependence behavior of the irreversibility line B(irr)(T) has been found, in which the power n for B(irr)(T)proportional to(1-t)(n) is affected by frequencies of the ac fields, no longer kept as a constant as in the Yeshurun and Malozemoff theory. We present the abnormal frequency dependent behavior and interpret it in framework of the flux diffusion model.

• 出版日期2009-8-17
• 单位上海大学