Dielectric relaxation, conductivity behavior and magnetic properties of Mg substituted Zn-Li ferrites

被引:156
作者
Singh, Navneet [1 ]
Agarwal, Ashish [1 ]
Sanghi, Sujata [1 ]
机构
[1] Guru Jambheshwar Univ Sci & Technol, Dept Appl Phys, Hisar 125001, Haryana, India
关键词
Dielectric properties; Magnetic properties; Spinel ferrites; FREQUENCY;
D O I
10.1016/j.cap.2010.11.073
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Spinel ferrites having compositions Zn0.5Li1-2xMgxFe2O4 (0 <= x <= 0.5) have been prepared by sol-gel auto combustion technique. The dielectric properties of these ferrites have been studied using impedance measurements in the frequency range 10 Hz-10 MHz and in the temperature range 310-473 K. The effect of temperature, frequency and composition on dielectric constant (is an element of'), dielectric loss (tan delta) and conductivity (sigma) have been discussed in terms of hopping of charge carriers (Fe2(+1) <-> Fe3+). The occurrence of peak in the dielectric loss (tans) spectra is found to be temperature and composition dependent. The electrical modulus formulism has also been employed to study the relaxation dynamics of charge carriers and the results indicate the presence of non-Debye type of relaxation in these ferrites. Identical values of activation energy for dc conduction (E-dc) and for conductivity relaxation (E-M") reveal that the charge carriers have to overcome the same energy barrier while conducting and relaxing. A single 'master curve' for normalized plots of all the modulus isotherms observed for a given composition indicates the temperature independence of dynamical process for charge carriers in the present ferrites. The absence of hysteresis and non-attainment of saturation magnetization (even at 8 kOe) suggests the super paramagnetic behaviour of these ferrites. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码:783 / 789
页数:7
相关论文
共 50 条
[41]   Synthesis, dielectric behavior and impedance measurement studies of Cr-substituted Zn-Mn ferrites [J].
Hankare, P. P. ;
Patil, R. P. ;
Garadkar, K. M. ;
Sasikala, R. ;
Chougule, B. K. .
MATERIALS RESEARCH BULLETIN, 2011, 46 (03) :447-452
[42]   Effect of Mn2+ substitution on structural, magnetic, electric and dielectric properties of Mg-Zn ferrites [J].
Ghodake, U. R. ;
Chaudhari, N. D. ;
Kambale, R. C. ;
Patil, J. Y. ;
Suryavanshi, S. S. .
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2016, 407 :60-68
[43]   Structural, dielectric and AC conductivity studies of Zn substituted nickel ferrites prepared by combustion technique [J].
Umapathy, G. ;
Senguttuvan, G. ;
Berchmans, L. John ;
Sivakumar, V. .
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS, 2016, 27 (07) :7062-7072
[44]   Microstructure and Magnetic Properties of Ni-Mg-Zn-Co Ferrites [J].
Patil, Sarjerao B. ;
Davari, Anil J. ;
Patil, Devidas R. ;
Patil, Rajendra P. .
MACROMOLECULAR SYMPOSIA, 2020, 393 (01)
[45]   Dielectric and magnetic properties of Mg-Ti substituted barium hexaferrite [J].
Soman, Vaishali V. ;
Nanoti, V. M. ;
Kulkarni, D. K. .
CERAMICS INTERNATIONAL, 2013, 39 (05) :5713-5723
[46]   Peculiar magnetic behavior and structural, electrical, dielectric properties of substituted R-type hexagonal ferrites [J].
Shahbaz, Muhammad ;
Sadiq, Imran ;
Butt, M. Muzamil Hussain ;
Javaid, Abdul Basit ;
Idrees, Mishal ;
Hussain, Sajjad ;
Sadiq, Farhan ;
Riaz, Saira ;
Naseem, Shahzad ;
Khan, Hasan M. .
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2020, 499
[47]   Dielectric relaxation behavior and impedance studies of Cu2+ ion doped Mg - Zn spinel nanoferrites [J].
Choudhary, Pankaj ;
Varshney, Dinesh .
SOLID STATE COMMUNICATIONS, 2018, 271 :89-96
[48]   Structural and magnetic properties of samarium-substituted spinel ferrites [J].
Zelai, Taharh .
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, 2021, 127 (11)
[49]   Dielectric properties of Cu substituted Ni0.5-xZn0.3Mg0.2Fe2O4 ferrites [J].
Bhandare, M. R. ;
Jamadar, H. V. ;
Pathan, A. T. ;
Chougule, B. K. ;
Shaikh, A. M. .
JOURNAL OF ALLOYS AND COMPOUNDS, 2011, 509 (06) :L113-L118
[50]   Mechanical behavior, enhanced dc resistivity, energy band gap and high temperature magnetic properties of Y-substituted Mg-Zn ferrites [J].
Ali, M. A. ;
Khan, M. N., I ;
Hossain, M. M. ;
Chowdhury, F-U-Z ;
Hossain, M. N. ;
Rashid, R. ;
Hakim, M. A. ;
Hoque, S. M. ;
Uddin, M. M. .
MATERIALS RESEARCH EXPRESS, 2020, 7 (03)