Effect of Sr-substitution on the structural and dielectric properties of LaFeO_(3) perovskite materials

作     者：D.Triyono C.A.Kafa H.Laysandra 

作者机构：Department of Physics Faculty of Mathematics and Natural Science(FMIPA)Universitas Indonesia Depok 16424Indonesia 

出 版 物：《Journal of Advanced Dielectrics》 (先进电介质学报（英文）)

年 卷 期：2018年第8卷第5期

页      面：47-56页

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：Ministry of TechnologyResearch and Higher Education of Republic of Indonesiaunder KLN Grant No. 537/UN2.R3.1/HKP05.00/2018 

主　　题：La_(1-x)Sr_(x)FeO_(3) impedance spectroscopy conductivity dielectric 

摘      要：The study aims to investigate the structural and dielectric properties of perovskite La_(1-x)Sr_(x)FeO_(3)(x=0.1,0.2,0.3,and 0.4)synthesized by solgel and sintering methods.X-ray diffraction(XRD),transmission electron microscopy(TEM),and LCR-Meter were used to identify the phase,crystallography parameters,morphology,particle size,and electrical behavior of the synthesized perovskite *** samples showed a single-phase orthorhombic crystal structure with Pbnm space ***-substitution induced the volume unit cell and crystallite size to *** synthesized nanoparticles were uniform and homogeneous with the particle size less than 200 *** spectroscopy(IS)was used to explain the electrical behavior as a function of frequency(100 Hz to 1 MHz)at various temperatures(300–373 K).The presence of small polarons as charge carriers within the grain and grain boundary were elucidated from the electrical conductivity ***-substitution caused the dielectric constant and electronic conductivity to increase with the highest values obtained from La_(1-x)Sr_(x)FeO_(3)(x=0.4).