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首页> 外文期刊>The journal of physical chemistry, C. Nanomaterials and interfaces >Composition-Dependent Assembly and Magnetic Specificity of (Fe_(1-x)Ni_x)_(0.5)Pt_(0.5) Amorphous Nanothreads Through Substitution of Ni for Fe in an FePt System
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Composition-Dependent Assembly and Magnetic Specificity of (Fe_(1-x)Ni_x)_(0.5)Pt_(0.5) Amorphous Nanothreads Through Substitution of Ni for Fe in an FePt System

机译：通过Fe取代Fe的（Fe_（1-x）Ni_x）_（0.5）Pt_（0.5）非晶态纳米线的成分依赖性组装和磁特性

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摘要

A new effective strategy of composition-dependent assembly is first reported to synthesize length-controllable amorphous (Fe_(1-x)Ni_x)_(0.5)Pt_(0.5) nanoalloys (nanoparticles, nanorods, and nanothreads) through phase-transfer process. The synthesized nanoalloy morphologies and structures, phase transformation behaviors, and magnetic properties were investigated by high-resolution transmission electron microscopy (HRTEM), X-ray diffraction analysis (XRD), differential scanning calorimetry (DSC), and vibration sample magnetometry (VSM) measurements. The morphologies of as-prepared amorphous nanoalloys show composition-dependent nanofhread length variation from 8 μm to 600 nm, which results in different phase-transformation behaviors and magnetic properties. In particular, magnetic specificity is discovered in that the magnetic property of as-obtained amorphous nanoalloys change from soft to hard as Ni content increases, but the variation trend of annealed ones is the inverse case. Thus, a coercivity constant composition point is found at Fe_(21)Ni_(31)Pt_(48). And FeNiPt nanothreads present larger magnetic anisotropy with higher coercivity of 3kOe than that of its nanoparticles with coercivity of 2.4kOe. In addition, Ni lowers L10 kinetic ordering temperature in (Fe_(1-x)Ni_x)_(0.5)Pt_(0.5) nanoalloy systems.
机译：首先报道了一种新的有效的依赖成分的组装策略，该方法通过相转移过程合成长度可控制的非晶态（Fe_（1-x）Ni_x）_（0.5）Pt_（0.5）纳米合金（纳米粒子，纳米棒和纳米线）。通过高分辨率透射电子显微镜（HRTEM），X射线衍射分析（XRD），差示扫描量热法（DSC）和振动样品磁法（VSM）研究了合成的纳米合金的形态和结构，相变行为以及磁性能。测量。所制备的非晶态纳米合金的形貌显示出从8μm到600 nm的依赖于组成的纳米级长度变化，这导致不同的相变行为和磁性能。特别地，发现了磁性特异性，因为所获得的非晶态纳米合金的磁性随Ni含量的增加而从软变为硬，而退火的非晶态纳米合金的变化趋势则相反。因此，在Fe_（21）Ni_（31）Pt_（48）处发现了矫顽力常数组成点。 FeNiPt纳米线的磁性各向异性大于3kOe的矫顽力，而其纳米粒子的矫顽力为2.4kOe。此外，Ni降低了（Fe_（1-x）Ni_x）_（0.5）Pt_（0.5）纳米合金系统中L10的动力学有序温度。

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