High magnetic field-induced synthesis of one-dimensional FePt nanomaterials
High magnetic field-induced synthesis of one-dimensional FePt nanomaterials
复制标题
高磁场诱导合成一维 FePt 纳米材料
DOI：
10.1039/c6ra14977d
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发表时间：
2016-01-01
期刊：
影响因子：
3.9
通讯作者：
Wang, Qiang
中科院分区：
文献类型：
--
作者：
Wu, Chun;Pei, Wenli;Wang, Qiang
采用6T强磁场合成了FePt纳米材料。结果表明，外加强磁场有利于FePt纳米材料的一维各向异性生长。讨论了强磁场诱导各向异性生长的机理。在强磁场作用下，FePt纳米材料发生磁化，其易磁化轴与磁场方向平行。具有相同取向的磁化纳米颗粒通过磁偶极相互作用容易附着形成一维纳米结构。此外，磁化纳米材料更倾向于各向异性生长，具有更高的纵横比，以降低退磁能量。
6 Tesla high magnetic field has been employed to synthesize FePt nanomaterials. The results show that the applied high magnetic field can facilitate one-dimensional anisotropic growth of FePt nanomaterials. The mechanism of high magnetic field-induced anisotropic growth has been discussed. With the effect of high magnetic field, FePt nanomaterials would be magnetized and their easy magnetization axis would be parallel to the field direction. The magnetized nanoparticles with same orientation easily attach to form a one-dimensional nanostructure by magnetic dipolar interactions. Moreover, the magnetized nanomaterials preferred anisotropic growth with higher aspect ratio to lower the demagnetization energy.