Magnetization Ratchet in Cylindrical Nanowires

被引：62

作者：

Bran, Cristina ^{[1
]}

Berganza, Eider ^{[1
]}

Fernandez-Roldan, Jose A. ^{[1
]}

Palmero, Ester M. ^{[1
,5
]}

Meier, Jessica ^{[1
]}

Calle, Esther ^{[1
]}

Jaafar, Miriam ^{[1
]}

Foerster, Michael ^{[2
]}

Aballe, Lucia ^{[2
]}

Fraile Rodriguez, Arantxa ^{[3
,4
]}

del Real, Rafael P. ^{[1
]}

Asenjo, Agustina ^{[1
]}

Chubykalo-Fesenko, Oksana ^{[1
]}

Vazquez, Manuel ^{[1
]}

机构：

[1] CSIC, Inst Mat Sci Madrid, E-28049 Madrid, Spain

[2] CELLS, ALBA Synchrotron Light Facil, Barcelona 08290, Spain

[3] Univ Barcelona, Dept Fis Mat Condensada, E-08028 Barcelona, Spain

[4] Univ Barcelona, Inst Nanociencia & Nanotecnol IN2UB, E-08028 Barcelona, Spain

[5] IMDEA Nanosci, Div Permanent Magnets & Applicat, Madrid 28049, Spain

来源：

ACS NANO | 2018年 / 12卷 / 06期

关键词：

multisegmented nanowires; remagnetization ratchet; magnetic domains; vortex domain walls; dipolar coupling; ARRAYS; ANISOTROPY; MEMORY; FIELD;

D O I：

10.1021/acsnano.8b02153

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The unidirectional motion of information carriers such as domain walls in magnetic nanostrips is a key feature for many future spintronic applications based on shift registers. This magnetic ratchet effect has so far been achieved in a limited number of complex nanomagnetic structures, for example, by lithographically engineered pinning sites. Here we report on a simple remagnetization ratchet originated in the asymmetric potential from the designed increasing lengths of magnetostatically coupled ferromagnetic segments in FeCo/Cu cylindrical nanowires. The magnetization reversal in neighboring segments propagates sequentially in steps starting from the shorter segments, irrespective of the applied field direction. This natural and efficient ratchet offers alternatives for the design of three-dimensional advanced storage and logic devices.

引用

页码：5932 / 5939

页数：8

共 52 条

[1] The ALBA spectroscopic LEEM-PEEM experimental station: layout and performance [J].