FePt nano-stripes fabricated on anodic aluminum oxide templates  

作　　者：邓晨华 乔新玉 王芳 范九萍 曾浩 许小红 

机构地区：[1]Key Laboratory of Magnetic Molecules and Magnetic Information Materials of Ministry of Education,Shanxi Normal University [2]School of Chemistry and Materials Science,Shanxi Normal University [3]Department of Physics,University at Buffalo,SUNY,Buffalo,New York 14260,USA

出　　处：《Chinese Physics B》2015年第7期490-495,共6页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant Nos.51025101,51101095,61434002,11274214,and 51301099);the Program of"One Hundred Talented People"of Shanxi Province,China

摘　　要：A new Fe Pt 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. Fe Pt 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 Fe Pt 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 Fe Pt 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 selforganized AAO templates can be used to control the morphology and magnetic behavior of Fe Pt materials.A new Fe Pt 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. Fe Pt 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 Fe Pt 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 Fe Pt 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 selforganized AAO templates can be used to control the morphology and magnetic behavior of Fe Pt materials.

关 键 词：FePt nanostructure anodic aluminum oxide maze-like patterns magnetic properties 

分 类 号：O484.43[理学—固体物理]