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Fabrication and magnetic properties of ordered Fe_(60)Pb_(40) nanowire arrays electrodeposited in AAO templates

机译:电沉积在AAO模板中的有序Fe_(60)Pb_(40)纳米线阵列的制备和磁性

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Ordered ferromagnetic-nonmagnetic heterogeneous Fe_(60)Pb_(40) nanowire arrays were successfully fabricated by alternating current (AC) electrodeposition into nanoporous alumina templates. Transmission electron microscopy (TEM) image and selected-area diffraction (SAED) pattern analysis showed that the Fe_(60)Pb_(40) nanowires are polycrystalline with an average diameter of 22 nm and lengths up to several micrometers. X-ray diffraction (XRD) observations indicated that α-Fe and fcc Pb phase coexist and do not form metastable alloy phase. The as-deposited samples were annealed at 200, 300, 400 and 500℃, respectively. Magnetic measurements showed that nanowires have high magnetic anisotropy with their easy axis parallel to the nanowire arrays, and the coercivity of the samples increased with the annealing temperature up to 400℃ and reached a maximum (2650 Oe). The change of magnetic properties associated with the microstructure was discussed.
机译:通过将交流电(AC)电沉积到纳米多孔氧化铝模板中,成功地制造了有序的铁磁-非磁异质Fe_(60)Pb_(40)纳米线阵列。透射电子显微镜(TEM)图像和选择区域衍射(SAED)图案分析表明,Fe_(60)Pb_(40)纳米线是多晶的,平均直径为22 nm,长度可达几微米。 X射线衍射(XRD)观察表明,α-Fe和fcc Pb相共存,并且不形成亚稳合金相。沉积后的样品分别在200、300、400和500℃下退火。磁性测量表明,纳米线具有较高的磁各向异性,其易轴平行于纳米线阵列,样品的矫顽力随退火温度升高至400℃而增加,并达到最大值(2650 Oe)。讨论了与微观结构有关的磁性能的变化。

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