Effect of substrate temperature on the structural and electrical properties of La and Mn co-doped BiFeO3 thin films

被引：15

作者：

Kolte, Jayant ^{[1
]}

Daryapurkar, A. S. ^{[2
]}

Agarwal, Mohit ^{[3
]}

Gulwade, D. D. ^{[4
]}

Gopalan, P. ^{[1
,5
]}

机构：

[1] Indian Inst Technol, Dept Met Engn & Mat Sci, Bombay 400076, Maharashtra, India

[2] Indian Inst Informat Technol, Dept Basic Sci, Nagpur, Maharashtra, India

[3] Thapar Univ, Dept Elect & Commun Engn, Patiala, Punjab, India

[4] VES Coll Arts Commerce & Sci, Dept Phys, Bombay, Maharashtra, India

[5] Thapar Univ, Patiala, Punjab, India

来源：

THIN SOLID FILMS | 2016年 / 619卷

关键词：

Multiferroics; Ferroelectric; Thin films; Leakage current mechanism; Impedance spectroscopy; Pulsed laser deposition; AC conductivity analysis; MULTIFERROIC PROPERTIES; FERROELECTRIC PROPERTIES; ANNEALING TEMPERATURE; GROWTH-TEMPERATURE; BISMUTH FERRITE; POLARIZATION; DEPOSITION;

D O I：

10.1016/j.tsf.2016.10.045

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effect of substrate temperature on the structural and electrical properties of multiferroic Bi0.90La0.10Fe0.95Mn0.05O3 (BLFMO) thin films deposited on Pt (111)/Ti/SiO2/Si substrate using pulsed laser deposition (PLD) has been investigated. Films with substrate temperature ranging from 450 degrees C to 650 degrees C have been deposited. The grain size and roughness are found to increase with substrate temperature. The film deposited at 575 degrees C exhibitsmaximumremnant polarization around 39 mu C/cm(2) and a coercive field of 400 kV/cm. The cyclic fatigue study of the sample shows only 4% loss after 10(8) cycles. Complex impedance study of the BLFMO thin films demonstrates electrical homogeneity of the sample. AC conductivity data has been fitted using Jonscher single power law, and value of n found to be <1 indicating translational hopping conduction mechanism. The lowest leakage current found is 4.37 x 10(-6) A/cm(2) at 575 degrees C. The leakage current mechanism is found to be dominated by space charge limited current and Fowler-Nordheim conduction mechanism. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：308 / 316

页数：9

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