退火温度对电沉积FeNi纳米线阵列结构及磁性能的关联性研究  

Relationship between annealing temperature and structure and magnetic properties of electrodeposited FeNi nanowire arrays

作　　者：陈哲 康树杰 朱乾科 张克维[1,2] CHEN Zhe;KANG Shujie;ZHU Qianke;ZHANG Kewei(School of Materials Science and Engineering, Taiyuan University of Science and Technology,Taiyuan 030024, China;Shanxi Province Key Laboratory of Magnetic and Electric Functional Materials and Their Applications,Taiyuan University of Science and Technology, Taiyuan 030024, China)

机构地区：[1]太原科技大学材料科学与工程学院,太原030024 [2]太原科技大学磁电功能材料及应用山西省重点实验室,太原030024

出　　处：《功能材料》2022年第5期5193-5198,共6页Journal of Functional Materials

基　　金：山西省回国留学人员科研教研项目(HGKY2019083);山西省高等学校科技创新项目(2021L309);山西省基础研究计划(202103021223270);太原科技大学博士启动金(20212027);吕梁市引进高层次科技人才重点研发项目(2021RC-2-15)。

摘　　要：采用E-T和脉冲电化学沉积法,利用氧化铝(AAO)模板制备出直径200 nm,长度约为13.1μm的非晶态FeNi纳米线阵列。FeNi纳米线阵列的形貌、成分、微观结构以及磁学性能分别通过场发射扫描电子显微镜(SEM)、场发射透射电子显微镜(TEM)、X射线衍射仪(XRD)以及振动样品磁强计(VSM)进行表征。研究结果表明,FeNi纳米线排列致密,外壁平整光滑,粗细均匀,元素分布均匀。制备的纳米线表现出纯非晶结构,退火后从非晶基体中析出γ(Fe,Ni)相,且晶粒的生长具有明显的(111)择优取向。VSM结果表明在非晶纳米线中具有较强的磁各向异性,其易磁化轴为平行于长轴方向。随着退火温度的升高,矫顽力H_(c)和剩磁比B_(r)/B_(s)整体呈下降趋势,主要归因于纳米线内应力的释放及纳米晶间的磁交换耦合作用。Alumina(AAO)template with diameter of 200 nm and length of about 13.1μm was prepared by E-T and pulse electrochemical deposition amorphous FeNi nanowire arrays(NWs).The morphology,composition,microstructure and magnetic properties were measured by SEM,TEM,XRD and VSM,respectively.The results show that FeNi NWs are densely arranged,the outer wall is flat and smooth,the thickness is uniform,and the elements are evenly distributed.The prepared NWs exhibit pure amorphous structure.γ(Fe,Ni)phase precipitates gradually with a higher annealing temperature,and the grain growth has obvious(111)preferred orientation.VSM results show that there is strong magnetic anisotropy in amorphous nanowires,and its easy magnetization axis is parallel to the long axis.Raising annealing temperature,H_(c) and B_(r)/B_(s) show a downward trend as a whole,which is mainly due to the release of internal stress in nanowires and the magnetic exchange coupling between nanocrystals.

关 键 词：AAO模板 FeNi纳米线 电化学沉积 磁各向异性 

分 类 号：TM271[一般工业技术—材料科学与工程]