Halide Ion-Mediated Synthesis of L10-FePt Nanoparticles with Tunable Magnetic Properties,Nano Letters

当前位置： X-MOL 学术 › Nano Lett. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Halide Ion-Mediated Synthesis of L10-FePt Nanoparticles with Tunable Magnetic Properties
Nano Letters ( IF 9.6 ) Pub Date : 2018-11-15 00:00:00 , DOI: 10.1021/acs.nanolett.8b03603
Wenjuan Lei ₁ , Junjie Xu ₂ , Yongsheng Yu ₁ , Weiwei Yang ₁ , Yanglong Hou ₂ , Dafa Chen ₁

Affiliation

L1₀-FePt nanoparticles (NPs) have great potential in areas of advanced magnetic and catalytic applications. Here, we present a facile control route for synthesis of hard magnetic L1₀-FePt NPs in which halide ions (Cl^–, Br^–, or I^–) were added to the synthetic process to promote the phase transformation. It is confirmed that the strong ionic binding force between halide ions and Fe³⁺ or Pt²⁺ ions could facilitate the formation of L1₀-FePt phase due to favoring growth of FePt NPs in a more thermodynamically stable way, which enables the formation of an ordered structure. L1₀-FePt NPs with the highest coercivity of 8.64 kOe and saturation magnetization of 64.21 emu/g at room temperature can be directly obtained by controlling the amount of the halide ions. In comparison with conventional solution phase reduction methods, the halide ion-assisted method shows enhanced capability to tune the growth of hard magnetic bimetallic NPs, particularly Pt-based bimetallic NPs.

中文翻译：

卤化物介导的具有可调磁性的L1 ₀ -FePt纳米粒子的合成

L1 ₀ -FePt纳米颗粒（NPs）在先进的磁性和催化应用领域具有巨大潜力。在这里，我们提出了一个容易控制路线硬磁L1的合成₀ -FePt纳米粒子，其中卤离子（氯^-，溴^-或I ^{- ）}加入到合成过程，以促进相变。可以肯定的是，卤化物离子与Fe ³⁺或Pt ²⁺离子之间的强离子结合力可以促进LP ₀ -FePt相的形成，这是因为其以更热力学稳定的方式促进了FePt NPs的生长，从而可以形成Pt ²⁺。有序的结构。L1 ₀通过控制卤离子的量，可以直接获得具有最高矫顽力为8.64 kOe和在室温下饱和磁化强度为64.21 emu / g的-FePt NP。与传统的溶液相还原方法相比，卤离子辅助方法显示出增强的功能，可以调节硬磁性双金属NP，特别是基于Pt的双金属NP的生长。

更新日期：2018-11-15

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南