arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0904.4899cond-mat.supr-con
收藏

超导体LuNi2B2C中涡旋晶格的小角中子散射研究

Small-angle neutron scattering study of the vortex lattice in superconducting LuNi2B2C

J. M. Densmore, P. Das, K. Rovira, T. D. Blasius, L. DeBeer-Schmitt, N. Jenkins, D. McK. Paul, C. D. Dewhurst, S. L. Bud'ko, P. C. Canfield, M. R. Eskildsen

摘要:

本文研究了LuNi_2B_2C中涡旋周围的磁场分布。小角中子散射测量的涡旋晶格(VL)在这种材料中被扩展到前所未有的大值的散射矢量q,通过使用高磁场,以减少VL间距,并通过使用更高阶的反射。在最高测量场下观察到正方形VL,其取向为最近邻方向沿着晶体[110]方向。一阶VL形状因子,|F(q10)|随着磁场的增加,高阶形状因子的测量,|F(qhk)|,揭示了显著的平面内各向异性,并且还允许VL场分布的真实空间重构。

英文摘要:

We present studies of the magnetic field distribution around the vortices in LuNi2B2C. Small-angle neutron scattering measurements of the vortex lattice (VL) in this material were extended to unprecedentedly large values of the scattering vector q, obtained both by using high magnetic fields to decrease the VL spacing and by using higher order reflections. A square VL, oriented with the nearest neighbor direction along the crystalline [110] direction, was observed up to the highest measured field. The first-order VL form factor, |F(q10)|, was found to decrease exponentially with increasing magnetic field. Measurements of the higher order form factors, |F(qhk)|, reveal a significant in-plane anisotropy and also allow for a real-space reconstruction of the VL field distribution.

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。

↑