arXivDaily arXiv每日学术速递 周一至周五更新
稍安勿躁,官方尚未更新
arXiv 1002.2095cond-mat.supr-concond-mat.str-el
收藏

(Ba,K)Fe2As2超导单晶的强内禀超导载流能力和涡旋雪崩

Very strong intrinsic supercurrent carrying ability and vortex avalanches in (Ba,K)Fe2As2 superconducting single crystals

Xiao-Lin Wang, S. R. Ghorbani, Sung-Ik Lee, S. X. Dou, C. T. Lin, T. H. Johansen, Z. X. Cheng, G. Peleckis, K. Muller, M. Shabazi, G. L. Sun, D. L. Sun

摘要:

我们报道了Tc = 32 K的(Ba,K)Fe_2As_2单晶的钉扎电位U_0高达10^4 K,且U_0几乎不受场的影响。此外,(Ba,K)Fe2As2单晶在低温和高磁场下变得各向同性,导致非常刚性的涡旋晶格,即使在非常接近Hc2的磁场中也是如此。二维(Ba,K)Fe_2As_2中的刚性涡旋使其与具有二维涡旋的二维高Tc铜酸盐超导体区别开来,并使其能够承载很高的临界电流,在低温下大样品中也观察到由于高Jc引起的磁通跳跃。

英文摘要:

We report that single crystals of (Ba,K)Fe2As2 with Tc = 32 K have a pinning potential, U0, as high as 10^4 K, with U0 showing very little field depend-ence. In addition, the (Ba,K)Fe2As2 single crystals become isotropic at low temperatures and high magnetic fields, resulting in a very rigid vortex lattice, even in fields very close to Hc2. The rigid vortices in the two dimensional (Ba,K)Fe2As2 distinguish this compound from 2D high Tc cuprate superconductors with 2D vortices, and make it being capable of cearrying very high critical current.Flux jumping due to high Jc was also observed in large samples at low temperatures.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑