Enhanced broadband microwave reflection loss of carbon nanotube ensheathed Ni-Zn-Co-ferrite magnetic nanoparticles
Enhanced broadband microwave reflection loss of carbon nanotube ensheathed Ni-Zn-Co-ferrite magnetic nanoparticles
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DOI：
10.1016/j.matlet.2014.01.089
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发表时间：
2014-04-01
影响因子：
3
通讯作者：
Das, Sukhen
中科院分区：
文献类型：
--
作者：
Sarkar, Debarghya;Bhattacharya, Alakananda;Das, Sukhen
将通过溶胶凝胶法制备的镍锌钴铁氧体（NZCoF）纳米颗粒包裹在多壁碳纳米管（MWCNT）中，形成所需的复合材料NZCoF-CNT。样品的磁化曲线表明存在超顺磁性和亚铁磁性的混合状态，复合材料表明尽管存在非磁性 MWCNT，但 NZCoF 的磁性行为仍显着保留。测量了样品的微波频率反射损耗，与NZCoF相比，NZCoF-CNT的吸收明显增强。已经提出了一种综合的理论解释来解释当前和类似的先前工作中增强的微波吸收。 (C) 2014 Elsevier B.V. 保留所有权利。
Ni-Zn-Co-ferrite (NZCoF) nanoparticles prepared by sol-gel method were ensheathed in multi-walled carbon nanotubes (MWCNT) to form the desired composite NZCoF-CNT. Magnetization curves of samples indicate presence of mixed state of superparamagnetism and ferrimagnetism, with the composite indicating significant retention of magnetic behavior of NZCoF despite presence of non-magnetic MWCNT. Microwave frequency reflection loss of the samples was measured, and absorption is evidently enhanced in NZCoF-CNT, compared to that of NZCoF. A consolidated theoretical explanation has been proposed explaining enhanced microwave absorption in present and similar previous works. (C) 2014 Elsevier B.V. All rights reserved.