Synthesis of submicron sized Fe20Ni80 particles and their magnetic properties
Synthesis of submicron sized Fe20Ni80 particles and their magnetic properties
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DOI：
10.1063/1.3334170
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发表时间：
2010-04
影响因子：
3.2
通讯作者：
D. Kodama;K. Shinoda;Ryo Kasuya;K. Tohji;M. Doi;J. Balachandran
中科院分区：
文献类型：
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作者：
D. Kodama;K. Shinoda;Ryo Kasuya;K. Tohji;M. Doi;J. Balachandran
以肼为还原助剂，采用多元醇法合成了纳米Fe-Ni合金。粒径、微晶尺寸和晶相随多元醇的类型而变化。在乙二醇（EG）和正庚醇中合成的Fe-Ni颗粒的饱和磁化强度与本体相似，分别为73 emu/g和83 emu/g。在EG中合成的Fe-Ni粒子的磁化率在热处理后降低到27 Oe。虽然在这项研究中使用的多元醇的磁性是非常相似的，穆斯堡尔谱测量显示，铁镍颗粒与单一坡莫合金相合成时，只有使用EG。
Fe–Ni alloy nanoparticles were synthesized by polyol process using hydrazine as a reduction assist reagent. Particle size, crystallite size, and crystal phases varied with the type of polyol. The saturation magnetizations of the as-synthesized Fe–Ni particles synthesized in ethylene glycol (EG) and 1-heptanol were similar to the bulk and were 73 emu/g and 83 emu/g, respectively. On the other hand, the coercivities of the same were 41 and 123 Oe. The coercivity of the Fe–Ni particles synthesized in EG decreased to 27 Oe after heat treatment. Though the magnetic properties were very similar irrespective of the polyol used in this study, the Mossbauer spectroscopic measurements revealed that Fe–Ni particles with single permalloy phase was synthesized only when EG was used.