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.

引用

页数：5

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