FePt nano-stripes fabricated on anodic aluminum oxide templates

doi:10.1088/1674-1056/24/7/077504

中国物理B ›› 2015, Vol. 24 ›› Issue (7): 77504-077504.doi: 10.1088/1674-1056/24/7/077504

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇下一篇

FePt nano-stripes fabricated on anodic aluminum oxide templates

邓晨华^{a b}, 乔新玉^{a b}, 王芳^{a b}, 范九萍^{a b}, 曾浩^c, 许小红^{a b}

a Key Laboratory of Magnetic Molecules and Magnetic Information Materials of Ministry of Education, Shanxi Normal University, Linfen 041004, China;
b School of Chemistry and Materials Science, Shanxi Normal University, Linfen 041004, China;
c Department of Physics, University at Buffalo, SUNY, Buffalo, New York 14260, USA

收稿日期:2014-12-08 修回日期:2015-02-07 出版日期:2015-07-05 发布日期:2015-07-05

FePt nano-stripes fabricated on anodic aluminum oxide templates

Deng Chen-Hua (邓晨华)^{a b}, Qiao Xin-Yu (乔新玉)^{a b}, Wang Fang (王芳)^{a b}, Fan Jiu-Ping (范九萍)^{a b}, Zeng Hao (曾浩)^c, Xu Xiao-Hong (许小红)^{a b}

a Key Laboratory of Magnetic Molecules and Magnetic Information Materials of Ministry of Education, Shanxi Normal University, Linfen 041004, China;
b School of Chemistry and Materials Science, Shanxi Normal University, Linfen 041004, China;
c Department of Physics, University at Buffalo, SUNY, Buffalo, New York 14260, USA

Received:2014-12-08 Revised:2015-02-07 Online:2015-07-05 Published:2015-07-05
Contact: Wang Fang, Xu Xiao-Hong E-mail:wf_0716@163.com;xuxh@dns.sxnu.edu.cn

摘要/Abstract

摘要： A new FePt nanostructure with stripe-like patterns has been prepared by direct current (DC) magnetron sputtering on anodic aluminum oxide (AAO) templates. AAO templates anodized under low voltages (7 V) demonstrate self-organized, maze-like patterns, different from the conventional porous structures obtained at high voltages. FePt thin films deposited on such templates tend to replicate the morphology of the templates. Although there is no obvious spatial ordering, the dimensions of the FePt nano-stripes are highly uniform, due to the constrained growth along the transverse direction of the AAO pattern. The magnetic properties are strongly influenced by this unique morphology. While continuous films demonstrate strong exchange coupling, the dominant interaction in FePt nano-stripes with the same nominal thickness is magnetostatic. The morphology also dictates the magnetization reversal behaviors, with thin films dominated by domain nucleation; while nano-stripes incline to reverse their magnetization by spin rotation. Our work demonstrates that self-organized AAO templates can be used to control the morphology and magnetic behavior of FePt materials.

关键词: FePt nanostructure, anodic aluminum oxide, maze-like patterns, magnetic properties

Abstract: A new FePt nanostructure with stripe-like patterns has been prepared by direct current (DC) magnetron sputtering on anodic aluminum oxide (AAO) templates. AAO templates anodized under low voltages (7 V) demonstrate self-organized, maze-like patterns, different from the conventional porous structures obtained at high voltages. FePt thin films deposited on such templates tend to replicate the morphology of the templates. Although there is no obvious spatial ordering, the dimensions of the FePt nano-stripes are highly uniform, due to the constrained growth along the transverse direction of the AAO pattern. The magnetic properties are strongly influenced by this unique morphology. While continuous films demonstrate strong exchange coupling, the dominant interaction in FePt nano-stripes with the same nominal thickness is magnetostatic. The morphology also dictates the magnetization reversal behaviors, with thin films dominated by domain nucleation; while nano-stripes incline to reverse their magnetization by spin rotation. Our work demonstrates that self-organized AAO templates can be used to control the morphology and magnetic behavior of FePt materials.

Key words: FePt nanostructure, anodic aluminum oxide, maze-like patterns, magnetic properties

中图分类号: (Magnetic properties of nanostructures)

75.75.-c

75.50.Bb (Fe and its alloys) 75.60.Jk (Magnetization reversal mechanisms)

邓晨华, 乔新玉, 王芳, 范九萍, 曾浩, 许小红. FePt nano-stripes fabricated on anodic aluminum oxide templates[J]. 中国物理B, 2015, 24(7): 77504-077504.

Deng Chen-Hua (邓晨华), Qiao Xin-Yu (乔新玉), Wang Fang (王芳), Fan Jiu-Ping (范九萍), Zeng Hao (曾浩), Xu Xiao-Hong (许小红). FePt nano-stripes fabricated on anodic aluminum oxide templates[J]. Chin. Phys. B, 2015, 24(7): 77504-077504.

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FePt nano-stripes fabricated on anodic aluminum oxide templates

FePt nano-stripes fabricated on anodic aluminum oxide templates

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