Enhancement of vortex pinning in superconductor/ferromagnet bilayers via angled demagnetization

被引：9
|
作者：
Cieplak, Marta Z. [1 ,2 ]
Zhu, L. Y. [2 ]
Adamus, Z. [1 ,3 ]
Konczykowski, M. [3 ]
Chien, C. L. [2 ]
机构：
[1] Polish Acad Sci, Inst Phys, PL-02668 Warsaw, Poland
[2] Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA
[3] Ecole Polytech, Solides Irradies Lab, F-91128 Palaiseau, France
来源：
PHYSICAL REVIEW B | 2011年 / 84卷 / 02期
关键词：
MULTILAYERS; FILM;
D O I：
10.1103/PhysRevB.84.020514
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We use local and global magnetometry measurements to study the influence of magnetic domain width omega 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 omega approximate to 0.31 mu m is close to the magnetic penetration depth.
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页数：5
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