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利用电沉积及热硫化法制备了核/壳结构Fe/FeS2纳米线,研究了硫化过程对纳米线体系磁特性的影响。试验中,通过直流电沉积方法,可以在纳米孔洞高度有序排布的阳极氧化铝模板中制备Fe纳米线,之后部分溶去模板,再经450℃硫化处理,Fe纳米线表面可形成“毛刷”绒状物FeS2,从而形成核/壳结构Fe/FeS2纳米线。结果表明,随着高温硫化处理,Fe纳米线直径略有减小,且择优取向发生变化,并引起复合纳米线饱和磁化强度及矫顽力增强,主要认为是由于核/壳复合结构的形成引起纳米线体系静磁耦合作用降低所致。
The core / shell Fe / FeS2 nanowires were prepared by electrodeposition and thermal vulcanization. The influence of curing process on the magnetic properties of nanowires was investigated. In the experiment, Fe nanowires can be prepared in anodic alumina templates with highly ordered nanopores by DC deposition followed by partial dissolution of the template followed by vulcanization at 450 ° C to form Fe nanowires Brushing "the velvet FeS2 to form a core / shell structure of Fe / FeS2 nanowires. The results show that with the high-temperature vulcanization, the diameter of Fe nanowires decreases slightly, the preferred orientation changes and the saturation magnetization and coercivity of the composite nanowires increase, mainly due to the formation of the core / shell composite structure The nanowire system is reduced due to the decrease of the magnetostatic coupling.