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首页> 外文期刊>Magnetics, IEEE Transactions on >Potentiostatically Electrodeposited Hard-Magnetic Fe–Pd-Based Nanowires
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Potentiostatically Electrodeposited Hard-Magnetic Fe–Pd-Based Nanowires

机译：恒电位电沉积硬磁性Fe-Pd基纳米线

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摘要

Near equiatomic FePd nanowires (NWs) with the length of 3.5 and diameter of nm were potentiostatically deposited at −1.1 V for 900 s into a porous anodic aluminum oxide template. Cylindrical NWs with a consistent composition along their length were obtained after introducing two additional steps prior to the electrodeposition (ED) of the Fe–Pd NWs, i.e., template wetting and pre-ED of Au NWs. The as-deposited Fe–Pd NWs were isotropic and nanocrystalline with an fcc crystal structure and were magnetically soft. The influence on the development of the coercivity with annealing temperature and time due to the transformation was investigated. For this purpose, the as-deposited NWs were annealed at temperatures from 400 °C to 700 °C for 1-5 h in Ar + H and the phase transformation, microstructure and magnetic properties were analyzed. The coercivity was found to increase by increasing the annealing temperature, as the ordering becomes more complete. A maximum in the coercivity of kA/m and was achieved upon annealing at 600 °C for 4 h. The high remanence is attributed to the exchange coupling between the nanosized grains and/or the coupling between the soft [-Fe, -(Fe,Pd), fcc-FePd] and hard phases. The effect of the deposited Au NWs prior to the Fe–Pd NWs’ deposition on the ordering was evaluated as well; however, the magnetic properties were significantly decreased due to the formation of soft-magnetic phases, i.e., (Au, Fe) and (Au, Pd).
机译：长度为3.5纳米且直径为nm的近等原子FePd纳米线（NWs）在-1.1 V下恒电位沉积900 s到多孔阳极氧化铝模板中。在电沉积（ED）Fe-Pd NW之前引入两个额外的步骤，即模板润湿和Au NW的pre-ED，在引入两个额外的步骤后，获得了沿其长度方向具有一致组成的圆柱形NW。沉积态的Fe–Pd NW是各向同性的，具有fcc晶体结构的纳米晶体，并且具有软磁性。研究了转变对矫顽力的发展随退火温度和时间的影响。为此，将沉积态的NW在Ar + H中于400°C至700°C的温度下退火1-5小时，并分析了相变，微观结构和磁性能。发现随着顺序变得更完整，矫顽力会随着退火温度的升高而增加。在600°C退火4小时后，矫顽力达到了最大值kA / m。高剩磁归因于纳米晶粒之间的交换耦合和/或软相[-Fe，-（Fe，Pd），fcc-FePd]和硬相之间的耦合。还评估了在沉积Fe-Pd NW之前沉积的Au Au NWs对有序化的影响；然而，由于形成了软磁相，即（Au，Fe）和（Au，Pd），磁性能显着下降。

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