Large Increase of the Critical Field in a Magnet-Superconductor Nanowire Hybrid

被引：4

作者：

Kim, K. ^{[1
]}

Naugle, D. G. ^{[1
]}

Wu, W. ^{[1
]}

Lyuksyutov, I. F. ^{[1
]}

机构：

[1] Texas A&M Univ, Dept Phys, College Stn, TX 77843 USA

来源：

JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM | 2010年 / 23卷 / 06期

基金：

美国国家科学基金会;

关键词：

Superconductivity; Hybrid; Magnetic nanowires; Vortex pinning; Critical field;

D O I：

10.1007/s10948-010-0685-0

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have fabricated two-dimensional periodic arrays of parallel magnetic and superconducting nanowires on a silicon substrate. Parallel magnetic (nickel) nanowires of cross section 90 nm by 300 nm form a periodic array with Pb(82)Bi(18) superconducting nanowires of cross section 200 nm by 100 nm. These nanostructures were characterized with Scanning Electron Microscopy (SEM) and magnetic properties were studied with Magnetic Force Microscopy (MFM). The phase diagram was determined by electrical transport measurements. Depending on the temperature, the second critical field was 2 to 3 times larger than that of a homogeneous Pb(82)Bi(18) superconducting control film. The superconducting phase diagram and transport properties exhibit strong hysteresis in a magnetic field. Results are explained on the basis of the theory of magnet-superconductor hybrids.

引用

页码：1075 / 1077

页数：3

共 5 条

[1] Nucleation of superconductivity and vortex matter in superconductor-ferromagnet hybrids [J].