Attractive dielectric responses with doping of Cr3+ and Ti4+ in Sm1.5Sr0.5NiO4 ceramics

被引：0
作者：
Abraham, Kevin [1 ]
Thomas, A. K. [1 ]
Thomas, Jini [2 ]
Saban, K. V. [3 ]
机构：
[1] St Berchmans Coll, Smart Mat Analyt Res & Technol SMART Lab, Dept Phys, Changanacheri 686101, Kerala, India
[2] Kuriakose Elias Coll, Dept Phys, Kottayam, Kerala, India
[3] St Aloysius Coll, Alappuzha 689573, Kerala, India
来源：
MATERIALS TODAY-PROCEEDINGS | 2018年 / 5卷 / 10期
关键词：
solid state reaction; nickelates; colossal dielectric constant; impedance spectroscopy; grain boundaries; CACU3TI4O12; CONSTANT;
D O I：
10.1016/j.matpr.2018.06.529
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The doping effect of Cr3+ and Ti4+ in Sm1.5Sr0.5Ni1-x(Cr-x/Ti-x)O-4 (x=0.05) on crystal structure, grain response and dielectric behavior are investigated over a wide temperature range (30-200 degrees C) and frequency range (100 KHz - 10 MHz). The X-ray diffraction pattern confirms a single orthorhombic phase with space group Fmmm(69). Giant dielectric response is observed in these ceramics with considerable loss reduction in Ti4+ doped Sm1.5Sr0.5NiO4 as compared to Cr3+. Impedance spectroscopic studies reveal the contribution of grain and grain boundary to the colossal values of dielectric constant in these ceramics. (C) 2018 Elsevier Ltd. All rights reserved.
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页码：21279 / 21284
页数：6
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