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首页> 外文期刊>Materials Science and Engineering >Modulation of magnetic and dielectric response of mullite coated Cu-substituted Co-Zn-ferrite multiphase nanocomposites
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Modulation of magnetic and dielectric response of mullite coated Cu-substituted Co-Zn-ferrite multiphase nanocomposites

机译：莫来钛矿涂层Cu-取代的Cu-Zn-铁氧体多相纳米复合材料的磁性介电响应的调制

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摘要

Cu-substituted Co-Zn ferrite (CoZCF)) nanoparticles have been prepared by sol-gel method and incorporated in non-magnetic matrix of mullite. The crystallographic phases of CoZCF nanoparticles and CoZCF-mullite nanocomposites were confirmed by XRD and a variation of average crystallite diameter in the range of 15-58 nm has been observed between CoZCF nanoparticles and CoZCF-mullite nanocomposites. Magnetic study of CoZCF and CoZCF-mullite confirmed the presence of superparamagnetic relaxation as well as high magnetic orderings and high coercivity of 1514 Oe in CoZCF-mullite at room temperature. Dielectric observation reveals the presence of sufficiently high dielectric permittivity with a value of 16,372 at 10~2 Hz frequency and 427 at 10~4 Hz frequency in CoZCF-mullite nanocomposites. Dielectric response study reveals the presence of ferroelectric to paraelectric phase transition at a temperature of 348 °C. The presence of both magnetic and dielectric orderings of novel CoZCF-mullite nanocomposites would be very interesting for various magneto-dielectric device applications.
机译：Cu-取代的Co-Zn铁素体（COZCF））纳米颗粒已通过溶胶 - 凝胶法制体制备，并掺入莫来石的非磁性基质中。通过XRD确认CoZCF纳米颗粒和CoZCF-莫来石纳米复合材料的晶体相，在CoZCF纳米粒子和CoZCF-莫来石纳米复合材料之间观察到平均微晶直径的平均微晶直径的变化。 CoZCF和CoZCF-Mullite的磁性研究证实了在室温下在CozCF-Mullite中的高磁性排放以及1514 OE的高磁性排序和高矫顽力。介电观察揭示了在CoZCF-Mullite纳米复合材料中以10〜2 Hz频率的值为16,372的介电常数，在10〜4Hz的频率下存在足够高的介电常数。介电响应研究揭示了在348℃的温度下在施加铁电相转变的情况下的存在。对于各种磁电介质器件应用，新型CoZCF-Mullite纳米复合材料的磁性和介质排序的存在对于各种磁电介质装置应用非常有趣。

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