Study Of Structural And Dielectric Properties Of Ni-Mg Ferrite Nanoparticles

被引：0
|
作者：
Nongjai, Razia [1 ]
Batoo, Khalid Mujasam
Khan, Shakeel
机构：
[1] Aligarh Muslim Univ, Dept Appl Phys, Aligarh 202002, Uttar Pradesh, India
来源：
INTERNATIONAL CONFERENCE ON PHYSICS OF EMERGING FUNCTIONAL MATERIALS (PEFM-2010) | 2010年 / 1313卷
关键词：
Nanoferrites; dielectric constant; dielectric loss;
D O I：
暂无
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Ferrite nanoparticles of basic composition Ni0.7Mg0.3Fe2-xAlxO4 (0.0 <= x <= 0.5) were prepared through citrate gel method and characterized using XRD, TEM and dielectric spectroscopy techniques. The dielectric properties were studied as a function of frequency (42Hz-5MHz) at room temperature. The average particle size has been found between 8-17nm. The dispersion in dielectric properties and ac conductivity (sigma(ac)), with frequency reveals that the dispersion is due to Maxwell-Wagner type of interfacial polarization in general and the hopping of charge between Fe2+ and Fe3+ as well as between Ni2+ and Ni3+ ions at B-sites. The dielectric loss tangent (tan delta) shows abnormal behavior for the compositions 0.3, 0.4 and 0.5 which has been explained in the light of Rezlescue model.
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页码：346 / +
页数：2
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