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Dispersible and manipulable magnetic L10-FePt nanoparticles
Nanoscale ( IF 5.8 ) Pub Date : 2020/03/13 , DOI: 10.1039/c9nr10302c Xin Liu 1, 2, 3, 4 , Hui Wang 1, 2, 3, 4 , Shulan Zuo 1, 2, 3, 4 , Tianli Zhang 1, 2, 3, 4 , Ying Dong 1, 2, 3, 4 , Deyao Li 1, 2, 3, 4 , Chengbao Jiang 1, 2, 3, 4
Nanoscale ( IF 5.8 ) Pub Date : 2020/03/13 , DOI: 10.1039/c9nr10302c Xin Liu 1, 2, 3, 4 , Hui Wang 1, 2, 3, 4 , Shulan Zuo 1, 2, 3, 4 , Tianli Zhang 1, 2, 3, 4 , Ying Dong 1, 2, 3, 4 , Deyao Li 1, 2, 3, 4 , Chengbao Jiang 1, 2, 3, 4
Affiliation
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Oriented single-domain magnetic nanoparticles with a high remanence ratio Mr/Ms and maximum magnetic energy product (BH)max have attracted immense attention. However, nanoparticles easily agglomerate due to their extremely small size, which impedes the process of orientation. So manipulating the orientation of nanoparticles is still a key challenge. Here, L10-FePt single-domain nanoparticles were successfully synthesized by a chemical method in the liquid phase and nanoparticle-based anisotropic nanocomposites were obtained by dispersing the nanoparticles in liquid epoxy resin under an external magnetic field. The main factors that impact the orientation of L10-FePt single-domain nanoparticles were investigated further. It is found that the dispersibility of nanoparticles has a great impact on the degree of orientation, so do the applied magnetic field and the concentration of nanoparticles. Nanocomposites with homodisperse nanoparticles oriented under a suitable external magnetic field exhibit excellent magnetic performance, such as high coercivity Hc and remanence Mr, which gives the nanocomposites a higher (BH)max than the isotropic samples. The anisotropic nanocomposites show great potential in multifarious permanent magnet applications and fundamental research.
中文翻译：
分散和可操纵的磁性L10-FePt纳米粒子
具有高剩磁比M r / M s和最大磁能积（BH）max的定向单畴磁性纳米粒子引起了极大的关注。然而，纳米粒子由于其极小的尺寸而容易附聚，这阻碍了取向过程。因此，操纵纳米颗粒的取向仍然是关键的挑战。在此，通过液相化学方法成功地合成了L 1 0 -FePt单畴纳米颗粒，并且通过在外部磁场下将纳米颗粒分散在液体环氧树脂中而获得了基于纳米颗粒的各向异性纳米复合材料。影响L1方向的主要因素0-FePt单域纳米粒子进行了进一步研究。发现纳米颗粒的分散性对取向度有很大的影响，施加的磁场和纳米颗粒的浓度也有很大的影响。具有在适当的外部磁场下定向的均分散纳米颗粒的纳米复合材料表现出出色的磁性能，例如高矫顽力H c和剩磁M r，这使纳米复合材料的最大（BH）max比各向同性样品高。各向异性纳米复合材料在多种永磁体应用和基础研究中显示出巨大潜力。
更新日期：2020-04-09
中文翻译：
分散和可操纵的磁性L10-FePt纳米粒子
具有高剩磁比M r / M s和最大磁能积（BH）max的定向单畴磁性纳米粒子引起了极大的关注。然而，纳米粒子由于其极小的尺寸而容易附聚，这阻碍了取向过程。因此，操纵纳米颗粒的取向仍然是关键的挑战。在此，通过液相化学方法成功地合成了L 1 0 -FePt单畴纳米颗粒，并且通过在外部磁场下将纳米颗粒分散在液体环氧树脂中而获得了基于纳米颗粒的各向异性纳米复合材料。影响L1方向的主要因素0-FePt单域纳米粒子进行了进一步研究。发现纳米颗粒的分散性对取向度有很大的影响，施加的磁场和纳米颗粒的浓度也有很大的影响。具有在适当的外部磁场下定向的均分散纳米颗粒的纳米复合材料表现出出色的磁性能，例如高矫顽力H c和剩磁M r，这使纳米复合材料的最大（BH）max比各向同性样品高。各向异性纳米复合材料在多种永磁体应用和基础研究中显示出巨大潜力。
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