Magnetic properties of electrodeposited nanowires

被引：55

作者：

Heydon, GP ^{[1
]}

Hoon, SR ^{[1
]}

Farley, AN ^{[1
]}

Tomlinson, SL ^{[1
]}

Valera, MS ^{[1
]}

Attenborough, K ^{[1
]}

Schwarzacher, W ^{[1
]}

机构：

[1] UNIV BRISTOL,HH WILLS PHYS LAB,BRISTOL BS8 1TL,AVON,ENGLAND

来源：

JOURNAL OF PHYSICS D-APPLIED PHYSICS | 1997年 / 30卷 / 07期

关键词：

D O I：

10.1088/0022-3727/30/7/004

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Electrodeposited multilayered nanowires grown within a polycarbonate membrane constitute a new medium in which giant magnetoresistance (GMR) perpendicular to the plane of the multilayers can be measured. These structures can exhibit a perpendicular GMR of at least 22% at ambient temperature. We performed detailed studies both of reversible magnetization and of irreversible remanent magnetization curves for CoNiCu/Cu/CoNiCu multilayered and CoNiCu pulse-deposited nanowire systems with Co:Ni ratios of 6:4 and 7:3 respectively in the range 10-290 K, allowing the magnetic phases of these structures to be identified. Shape anisotropy in the pulse-deposited nanowire and inter-layer coupling in the multilayered nanowire are shown to make important contributions to the magnetic properties. Dipolar-like interactions are found to predominate in both nanowire systems. Magnetic force microscope (MFM) images of individual multilayered nanowires exhibit a contrast consistent with there being a soft magnetization parallel to the layers. Switching of the magnetic layers in the multilayered structure into the direction of the MFM tip's stray field is observed.

引用

页码：1083 / 1093

页数：11