Effect of Additives on the Direct Synthesis of L10-FePt Nanoparticles by Polyol Process
Effect of Additives on the Direct Synthesis of L10-FePt Nanoparticles by Polyol Process
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添加剂对多元醇法直接合成L10-FePt纳米粒子的影响
DOI：
10.3379/jmsjmag.29.814
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发表时间：
2005
影响因子：
--
通讯作者：
K. Tohji
中科院分区：
文献类型：
--
作者：
S. Hisano;K. Sato;K. Urakawa;B. Jeyadevan;K. Tohji
采用多元醇法在四乙二醇中合成的部分有序L10-FePt纳米粒子本质上多为多晶。在本文中，我们尝试通过在合成过程中引入成核剂和络合剂来制备L10-FePt纳米单晶。虽然以六氯铂酸盐（H2PtCl6）为成核剂可以合成具有恒定物理性能的L10-FePt颗粒，但颗粒仍保持多晶性质。当羧酸与H2PtCl6混合使用时，在Fe:Pt初始摩尔比为52.5:47.5,1 at% H2PtCl6和5等量Fe的羧酸的最佳实验条件下，FePt纳米颗粒的有序度达到50%以上。XRD图（001）和（110）的超晶格反射线以及室温下穆斯堡尔光谱的六分体证实了L10相的存在。这些粒子的矫顽力和各向异性场分别为5。分别是6克和40多克。
Partially ordered L10-FePt nanoparticles synthesized in tetraethylene glycol by using polyol process is mostly polycrystalline in nature. In this paper, we attempted the preparation of single crystal L10-FePt nanoparticles by introducing nucleating and complexing agents during the synthesis. Though the synthesis of L10-FePt particles with constant physical properties was possible by using hexachloroplatinate (H2PtCl6) as the nucleating agent, particles remained polycrystalline in nature. However, when carboxylic acid was used along with H2PtCl6 FePt nanoparticles with more than 50 % ordering was realized under the optimum experimental conditions of Fe:Pt initial mole ratio of 52.5:47.5, 1 at% H2PtCl6 and five equivalent weight of Fe of carboxylic acid. The superlattice reflection lines of (001) and (110) in XRD pattern and the sextets from the Mossbauer spectroscopy at room temperature confirmed the presence of L10 phase. The coercivity and anisotropy field of these particles were 5. 6 kOe and more than 40 kOe, respectively.
功能化表面稳定的L1_0型FePt纳米颗粒单层薄膜的晶体结构和磁性能
DOI：
--
发表时间：
2004
期刊：
Journal of Magnetism and Magnetic Materials 282
影响因子：
--
作者：
Y.Sasaki;M.Mizuno;A.Andrew;C.C.Yu;B.Jeyadevan et al.
通讯作者：
B.Jeyadevan et al.