Formation mechanism and magnetic properties of ferrite composite tubular microstructures

IF 3.3 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR Solid State Sciences Pub Date : 2025-01-31 DOI:10.1016/j.solidstatesciences.2025.107852

Yaqi Jiang , Jiaqi Feng , Guoqing Liu , Zixuan Chen , Qin Xu , Peipei Lu , Junmeng Zhang , Guangyu Wen , Lihu Liu , Huiyuan Sun

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Abstract

Changes in the morphology of FeNi alloy nanowires during annealing at different temperatures were studied by transmission electron microscopy. In this work, kinds of morphologies including composite oxide wire/tube, wire@tube (or core-shell) and pure tubular microstructures were obtained successfully. The structure can be tuned by changing the annealing temperature. The formation mechanism was discussed in detail based on ion diffusion and Kirkendal effect. The as-prepared and annealed samples were characterized by the X-ray diffraction (XRD), transmission electron microscopy (TEM) and EDS mapping, respectively. The material composition of the nanostructures with different morphologies was further determined, and the cation diffusion mechanism was deduced. The result of magnetic measurement showed the coercivity and squareness of the nanostructures perpendicular to the AAO film surface decrease with the increase of annealing temperature, and the hysteresis loop of the sample annealed at high temperature is in a wasp-waist shape, which is consistent with the result that the sample contains multiple magnetic phases. Obviously, the present ferrite heterogeneous composite microstructures have potential application as a multifunctional magnetic material.

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铁氧体复合管状组织的形成机理及磁性能

采用透射电镜研究了FeNi合金纳米线在不同退火温度下的形貌变化。在这项工作中，成功地获得了多种形态，包括复合氧化物线/管，wire@tube（或核-壳）和纯管状微观结构。可以通过改变退火温度来调整结构。基于离子扩散和Kirkendal效应，详细讨论了其形成机理。采用x射线衍射仪（XRD）、透射电镜（TEM）和能谱仪（EDS）对制备和退火后的样品进行了表征。进一步确定了不同形貌纳米结构的材料组成，并推导了阳离子扩散机理。磁测结果表明，垂直于AAO膜表面的纳米结构的矫顽力和方正度随退火温度的升高而降低，高温退火后样品的磁滞回线呈蜂腰状，这与样品含有多个磁相的结果一致。可见，铁氧体非均相复合微结构作为一种多功能磁性材料具有潜在的应用前景。

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来源期刊

Solid State Sciences 化学-无机化学与核化学

CiteScore

6.60

自引率

2.90%

发文量

214

审稿时长

27 days

期刊介绍： Solid State Sciences is the journal for researchers from the broad solid state chemistry and physics community. It publishes key articles on all aspects of solid state synthesis, structure-property relationships, theory and functionalities, in relation with experiments. Key topics for stand-alone papers and special issues: -Novel ways of synthesis, inorganic functional materials, including porous and glassy materials, hybrid organic-inorganic compounds and nanomaterials -Physical properties, emphasizing but not limited to the electrical, magnetical and optical features -Materials related to information technology and energy and environmental sciences. The journal publishes feature articles from experts in the field upon invitation. Solid State Sciences - your gateway to energy-related materials.