Synthesis of FeNi3 nanoparticles in benzyl alcohol and their electrical and magnetic properties

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• 作者：Gonzalo Abellán (1)
  Jose A. Carrasco (1)
  Eugenio Coronado (1)
  Helena Prima-García (1)
  
• 关键词：Nanoparticles ; FeNi3 ; Alloys ; Magnetic properties ; Conductivity ; Benzyl alcohol ; Awaruite ; Soft ferromagnetism
• 刊名：Journal of Sol-Gel Science and Technology
• 出版年：2014
• 出版时间：May 2014
• 年：2014
• 卷：70
• 期：2
• 页码：292-299
• 全文大小：
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• 作者单位：Gonzalo Abellán (1)
  Jose A. Carrasco (1)
  Eugenio Coronado (1)
  Helena Prima-García (1)
  
  1. Instituto de Ciencia Molecular, Universidad de Valencia, Catedrático José Beltrán 2, 46980, Paterna, Valencia, Spain
  
• ISSN：1573-4846

文摘

Pure and highly crystalline FeNi3 alloy nanoparticles (NPs) were synthesized via sol–gel route with benzyl alcohol, using hydrazine as a reduction reagent without the usage of additional surfactant molecules nor further annealing processes. The structural studies revealed that the particle size is of ca. 200?nm, whose structure consisted on aggregation of small crystallites of about 13?nm. The magnetic properties of the as-synthesized NPs were similar to the bulk with a saturation magnetization of 95?emu?g?. Moreover, the coercive field was ca. 50?G, exhibiting a M r /M s ratio of 0.03, indicative of soft ferromagnetism. The electrical transport in the temperature range 2-00?K exhibits a typical ferromagnetic metallic behaviour. Finally, similar FeNi3 NPs were synthesized in EtOH/H2O mixtures in the presence of sodium dodecyl sulphate molecules as surfactant for comparative purposes, exhibiting a typical half hard magnetic behaviour, highlighting the interest of the reported benzylic route.