Perpendicular Giant Magnetoresistance and Magnetic Properties of Co/Cu Nanowire Arrays Affected by Period Number and Copper Layer Thickness
One-dimensional magnetic nanowires have attracted much attention in the last decades due to their unique physical properties and potential applications in magnetic recording and spintronics. In this work, ordered arrays of Co/Cu multilayered nanowires which can be exploited to develop magnetoresisti...
Main Authors: | , , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
Hindawi Limited
2016-01-01
|
Series: | Advances in Condensed Matter Physics |
Online Access: | http://dx.doi.org/10.1155/2016/9019806 |
id |
doaj-8327cbacb26c414986e090eabd3bb4d0 |
---|---|
record_format |
Article |
spelling |
doaj-8327cbacb26c414986e090eabd3bb4d02020-11-24T22:54:13ZengHindawi LimitedAdvances in Condensed Matter Physics1687-81081687-81242016-01-01201610.1155/2016/90198069019806Perpendicular Giant Magnetoresistance and Magnetic Properties of Co/Cu Nanowire Arrays Affected by Period Number and Copper Layer ThicknessJuan Han0Xiufang Qin1Zhiyong Quan2Lanfang Wang3Xiaohong Xu4School of Chemistry and Materials Science, Key Laboratory of Magnetic Molecules and Magnetic Information Materials, Ministry of Education, Shanxi Normal University, Linfen 041004, ChinaSchool of Chemistry and Materials Science, Key Laboratory of Magnetic Molecules and Magnetic Information Materials, Ministry of Education, Shanxi Normal University, Linfen 041004, ChinaSchool of Chemistry and Materials Science, Key Laboratory of Magnetic Molecules and Magnetic Information Materials, Ministry of Education, Shanxi Normal University, Linfen 041004, ChinaSchool of Chemistry and Materials Science, Key Laboratory of Magnetic Molecules and Magnetic Information Materials, Ministry of Education, Shanxi Normal University, Linfen 041004, ChinaSchool of Chemistry and Materials Science, Key Laboratory of Magnetic Molecules and Magnetic Information Materials, Ministry of Education, Shanxi Normal University, Linfen 041004, ChinaOne-dimensional magnetic nanowires have attracted much attention in the last decades due to their unique physical properties and potential applications in magnetic recording and spintronics. In this work, ordered arrays of Co/Cu multilayered nanowires which can be exploited to develop magnetoresistive sensors were successfully prepared using porous anodic alumina (PAA) templates. The structure and morphology of the multilayered nanowire arrays were characterized by transmission electron microscopy and scanning electron microscopy. The nanowire arrays are highly ordered and the average diameter is about 50 nm, which is controlled by the pore diameter of the PAA templates. The influences of period number and Cu layer thickness on the magnetic and the giant magnetoresistance (GMR) properties were investigated. The coercivity and remanence ratio increase first and then gradually tend to be stable with the increase of period number and the Cu layer thickness, while the GMR ratio increases first and then decreases with the increase of the period number accompanied by an oscillatory behavior of GMR as the Cu layer thickness changes, which are ascribed to the spin dependence electron scattering in the multilayers. The optimum GMR of −13% appears at Co (50 nm)/Cu (5 nm) with 200 deposition cycles in our experimental conditions.http://dx.doi.org/10.1155/2016/9019806 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Juan Han Xiufang Qin Zhiyong Quan Lanfang Wang Xiaohong Xu |
spellingShingle |
Juan Han Xiufang Qin Zhiyong Quan Lanfang Wang Xiaohong Xu Perpendicular Giant Magnetoresistance and Magnetic Properties of Co/Cu Nanowire Arrays Affected by Period Number and Copper Layer Thickness Advances in Condensed Matter Physics |
author_facet |
Juan Han Xiufang Qin Zhiyong Quan Lanfang Wang Xiaohong Xu |
author_sort |
Juan Han |
title |
Perpendicular Giant Magnetoresistance and Magnetic Properties of Co/Cu Nanowire Arrays Affected by Period Number and Copper Layer Thickness |
title_short |
Perpendicular Giant Magnetoresistance and Magnetic Properties of Co/Cu Nanowire Arrays Affected by Period Number and Copper Layer Thickness |
title_full |
Perpendicular Giant Magnetoresistance and Magnetic Properties of Co/Cu Nanowire Arrays Affected by Period Number and Copper Layer Thickness |
title_fullStr |
Perpendicular Giant Magnetoresistance and Magnetic Properties of Co/Cu Nanowire Arrays Affected by Period Number and Copper Layer Thickness |
title_full_unstemmed |
Perpendicular Giant Magnetoresistance and Magnetic Properties of Co/Cu Nanowire Arrays Affected by Period Number and Copper Layer Thickness |
title_sort |
perpendicular giant magnetoresistance and magnetic properties of co/cu nanowire arrays affected by period number and copper layer thickness |
publisher |
Hindawi Limited |
series |
Advances in Condensed Matter Physics |
issn |
1687-8108 1687-8124 |
publishDate |
2016-01-01 |
description |
One-dimensional magnetic nanowires have attracted much attention in the last decades due to their unique physical properties and potential applications in magnetic recording and spintronics. In this work, ordered arrays of Co/Cu multilayered nanowires which can be exploited to develop magnetoresistive sensors were successfully prepared using porous anodic alumina (PAA) templates. The structure and morphology of the multilayered nanowire arrays were characterized by transmission electron microscopy and scanning electron microscopy. The nanowire arrays are highly ordered and the average diameter is about 50 nm, which is controlled by the pore diameter of the PAA templates. The influences of period number and Cu layer thickness on the magnetic and the giant magnetoresistance (GMR) properties were investigated. The coercivity and remanence ratio increase first and then gradually tend to be stable with the increase of period number and the Cu layer thickness, while the GMR ratio increases first and then decreases with the increase of the period number accompanied by an oscillatory behavior of GMR as the Cu layer thickness changes, which are ascribed to the spin dependence electron scattering in the multilayers. The optimum GMR of −13% appears at Co (50 nm)/Cu (5 nm) with 200 deposition cycles in our experimental conditions. |
url |
http://dx.doi.org/10.1155/2016/9019806 |
work_keys_str_mv |
AT juanhan perpendiculargiantmagnetoresistanceandmagneticpropertiesofcocunanowirearraysaffectedbyperiodnumberandcopperlayerthickness AT xiufangqin perpendiculargiantmagnetoresistanceandmagneticpropertiesofcocunanowirearraysaffectedbyperiodnumberandcopperlayerthickness AT zhiyongquan perpendiculargiantmagnetoresistanceandmagneticpropertiesofcocunanowirearraysaffectedbyperiodnumberandcopperlayerthickness AT lanfangwang perpendiculargiantmagnetoresistanceandmagneticpropertiesofcocunanowirearraysaffectedbyperiodnumberandcopperlayerthickness AT xiaohongxu perpendiculargiantmagnetoresistanceandmagneticpropertiesofcocunanowirearraysaffectedbyperiodnumberandcopperlayerthickness |
_version_ |
1725661486390444032 |