Heusler合金磁性纳米线的制备方法及磁性的研究进展  

Research Progress on Preparation Methods and Magnetic Properties of Heusler Alloy Magnetic Nanowires

作　　者：刘磊 闫泽[1,2] 李应琛 许云丽 潘礼庆 LIU Lei;YAN Ze;LI Yingchen;XU Yunli;PAN Liqing(Research Institute for Magnetoelectronics&Weak Magnetic-field Detection,College of Science,China Three Gorges University,Yichang 443002,China;Hubei Engineering Research Center of Weak Magnetic-field Detection,China Three Gorges University,Yichang 443002,China)

机构地区：[1]三峡大学理学院&磁电子与纳磁探测研究所,宜昌443002 [2]三峡大学湖北省弱磁探测工程技术研究中心,宜昌443002

出　　处：《材料导报》2021年第13期13148-13159,共12页Materials Reports

摘　　要：前HAMNWs制备工艺尚未成熟,存在组分偏差、结构无序、形貌不均等问题,阻碍了其基本物理性质的研究和功能器件的应用设计。当前已有的HAMNWs制备方法包括扩散驱动退火法、模板辅助法、化学合成退火法、分子束外延法、静电纺丝法、电沉积法等,这些方法各有其优势和缺陷。其中,SBA-15模板辅助的化学合成退火法制备的HAMNWs组分精确、结构高度有序,但该模板与AAO模板相比,孔道均一性相对较差,导致纳米线形貌均一性和有序性较弱;分子束外延法可以实现纳米线以原子级精度生长,然而,其制备设备昂贵、操作复杂,难以推广普及;扩散驱动退火法主要针对二元核壳型HAMNWs,而对于三元HAMNWs,其适用难度较大;静电纺丝法对组分和结构的控制较好,但对纳米线的形貌均一性控制较弱,整体呈纤维状;电沉积法制备的纳米线形貌均一可控,但对于含有难共沉积元素的合金纳米线,其组分和结构控制都较差。本文综述了HAMNWs的制备方法,详细对比了各种方法的优缺点;重点针对直流、脉冲、交流电沉积法制备过程中不同的生长机理进行了讨论,并在此基础上分析了纳米线生长过程中各种因素的影响与调控。同时还对纳米线的基本物理性质和磁性参数进行了归纳总结,最后对未来HAMNWs的制备及应用发展进行了展望。Up to now,magnetic nanowires have been widely used in high density vertical magnetic memory,sensors,biomedicine,catalysts and other fields.Among them,Heusler alloy magnetic nanowires(HAMNWs)have attracted lots of attentions because of their excellent performance.However,at present,the preparation process of HAMNWs is immature,and problems of component deviation,disordered structure and uneven morphology do exist,which hinders the further research of HAMNWs in the basic physical properties and functional device design.Currently,the methods of preparing HAMNWs include diffusion driven annealing,template-assisted,chemical synthesis annealing,molecular beam epitaxy,electrospinning,electrodeposition and so on.These methods have their own advantages and disadvantages.Among them,HAMNWs prepared by the chemical synthesis annealing method assisted with SBA-15 template have accurate composition and highly ordered structure.However,compared with AAO template,the uniformity of the channel of SBA-15 template are relatively weak,resulting in uniformity and orderliness of nanowires morphology is relatively weak.Molecular beam epitaxy can achieve the growth of nanowires in atomic precision,but it has the problems of expensive preparation equipment and complicated operation,which make it difficult to popularize.Diffusion-driven annealing method is mainly for binary core-shell HAMNWs,for ternary HAMNWs,this method is more difficult to apply.Electrospinning method can control the composition and structure of nanowire better,but the control of morphology is weak,cause the nanowires have a fiber-like shape.The nanowires prepared by the electrodeposition method have uniform morphology.Yet,as for nanowires containing elements which are difficult to co-deposition,the composition and structure are inferior.This article reviews the preparation methods of HAMNWs and compares the advantages and disadvantages of various methods in detail.Focus on the different growth mechanisms in different preparation process including direct current,pulse

关 键 词：HEUSLER合金 铁磁纳米线 磁学性能 

分 类 号：O482.54[一般工业技术—材料科学与工程]