Fabrication of highly resistive La-Zn co-substituted spinel strontium nanoferrites for high frequency devices applications

被引：31

作者：

Ahmad, Iqbal ^{[1
,2
]}

Shah, Syed Mujtaba ^{[3
]}

Zafar, Muhammad Nadeem ^{[4
]}

Ullah, Saleem ^{[1
]}

Ul-Hamid, Anwar ^{[5
]}

Ashiq, Muhammad Naeem ^{[6
]}

Jabeen, Uzma ^{[7
]}

Shafa, Muhammad ^{[8
]}

Rahdar, Abbas ^{[9
]}

机构：

[1] Xi An Jiao Tong Univ, Sch Chem Engn & Technol, Xian 710049, Peoples R China

[2] Allama Iqbal Open Univ, Dept Chem, Islamabad 44000, Pakistan

[3] Quaid I Azam Univ, Dept Chem, Islamabad 45320, Pakistan

[4] Univ Gujrat, Dept Chem, Gujrat 50700, Pakistan

[5] King Fahd Univ Petr & Minerals, Res Inst, Engn Res Ctr, Dhahran 31261, Saudi Arabia

[6] Bahauddin Zakariya Univ, Inst Chem Sci, Multan 60880, Pakistan

[7] Sardar Bahadur Khan Womens Univ, Fac Basic Sci, Quetta 87300, Pakistan

[8] Xi An Jiao Tong Univ, State Key Lab Mech Behav Mat, Sch Mat Sci & Engn, Xian 710049, Peoples R China

[9] Univ Zabol, Dept Phys, Zabol 98615538, Iran

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2021年 / 259卷

关键词：

Spinel ferrites; Electrochemical impedance spectroscopy; Grain boundary volume; Charge transfer process; Dielectric polarization; High frequency devices;

D O I：

10.1016/j.matchemphys.2020.124031

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The spinel La-Zn co-doped strontium nanoferrites having general formula of Sr1-xLaxFe2-yZnyO4 (0.0 <= x <= 0.1, 0.0 <= y <= 1.0) have been synthesized. X-ray diffraction studies have been revealed successful fabrication of ferrites. Scanning electron microscopy results have shown that size of the particle of the ferrite samples lie in nanorange. DC electrical resistivity at room temperature increases with La3+ and Zn2+ ions concentration while dielectric parameters and AC conductivity decreases with concentration of these ions. Frequency dependent behavior of dielectric parameters has shown that values of these dielectric parameters decrease with frequency initially at lower values of frequency and then become almost constant at higher values of frequency. Electrochemical impedance spectroscopy data shows that the charge transfer phenomenon is mainly controlled by grain boundaries. Further, enhanced DC resistivity ranging from 1.08 x 10(9) to 1.67 x 10(9) Omega cm and low dielectric loss values of the La-Zn co-doped strontium nanoferrites suggest their applications in high frequency devices.

引用

页数：9

共 74 条

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