Enhancement of vortex pinning in superconductor/ferromagnet bilayers via angled demagnetization
Enhancement of vortex pinning in superconductor/ferromagnet bilayers via angled demagnetization
复制标题
通过成角度退磁增强超导体/铁磁体双层中的涡旋钉扎
DOI：
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
C. Chien
中科院分区：
文献类型：
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作者：
M. Cieplak;L. Zhu;Z. Adamus;M. Konczykowski;C. Chien
我们使用本地和全球的磁强计测量研究磁畴宽度$W$的影响域诱导的涡旋钉扎在超导/铁磁双层，建立了一个Nb膜和铁磁Co/Pt多层垂直磁各向异性，与绝缘层，以消除邻近效应。通过特殊的退磁过程，获得了具有不同的和系统可调宽度的准周期畴图案，在超导层上施加可调的涡旋钉扎。当$wensuremath{approx}0.31phantom{
ule{0.22222em}{0 ex}}ensuremath{mu}$m接近磁穿透深度。
We use local and global magnetometry measurements to study the influence of magnetic domain width $w$ on the domain-induced vortex pinning in superconducting/ferromagnetic bilayers, built of a Nb film and a ferromagnetic Co/Pt multilayer with perpendicular magnetic anisotropy, with an insulating layer to eliminate the proximity effect. The quasiperiodic domain patterns with different and systematically adjustable width $w$, as acquired by a special demagnetization procedure, exert tunable vortex pinning on a superconducting layer. The largest enhancement of vortex pinning, by a factor of more than 10, occurs when $wensuremath{approx}0.31phantom{
ule{0.222222em}{0ex}}ensuremath{mu}$m is close to the magnetic penetration depth.