Direct synthesis of fct-FePt nanoparticles by chemical route
Direct synthesis of fct-FePt nanoparticles by chemical route
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DOI：
10.1143/jjap.42.l350
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发表时间：
2003-04-01
期刊：
影响因子：
--
通讯作者：
Takahashi, M
中科院分区：
文献类型：
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作者：
Jeyadevan, B;Urakawa, K;Takahashi, M
在300℃的温度下，通过在四甘醇(TEG)中还原铂和乙酰丙酮铁，直接合成了FCT-FePT纳米颗粒。粒径在5~10 nm之间。X-射线衍射图显示出(001)和(110)两个超晶格反射峰，表明FePt颗粒为四方晶系。由磁滞损耗分析在室温下测量的31KoE的H-k证实了FePT粒子的存在，该粒子具有分数有序的FCT结构，具有相当高的各向异性。然而，由于颗粒之间强烈的静磁相互作用，其RT矫直力仅为370 Oe。
Direct synthesis of fct-FePt nanoparticles was achieved by reducing platinum and iron acetylacetonates in tetraethylene glycol (TEG) at 300degreesC. The particle diameter was between 5 and 10 nm. The X-ray diffraction profile of the as-prepared FePt particles exhibited the superlattice reflections (001) and (110), which signified the tetragonality. The H-k of 31 kOe measured at room temperature (RT) from hysteresis loss analysis confirmed the presence of FePt particles with fractionally ordered fct structure which posses substantially high anisotropy. However, the RT coercivity was only 370 Oe due to strong magnetostatic interaction of the particles.