npsm 새물리 New Physics : Sae Mulli

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Research Paper

New Physics: Sae Mulli 2015; 65: 550-554

Published online June 30, 2015 https://doi.org/10.3938/NPSM.65.550

Copyright © New Physics: Sae Mulli.

Ferroelectric and Leakage Current Properties of a BiFeO$_{3}$-BaTiO$_{3}$ Solid Solution Prepared by Using Pulsed Laser Deposition

M. H. LEE1, D. J. KIM1, J. S. PARK1, M.-H. KIM1, T. K. SONG*1, D. DO2, W.-J. KIM3

1 School of Materials Engineering, Changwon National University, Changwon 641-773, Korea
2 Department of Advanced Materials Engineering, Keimyung University, Daegu 704-701, Korea
3 Department of Physics, Changwon National University, Changwon 641-773, Korea

Correspondence to:tksong@changwon.ac.kr

Received: April 28, 2015; Revised: May 13, 2015; Accepted: May 13, 2015

This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A polycrystalline 0.67BiFeO$_{3}$-0.33BaTiO$_{3}$ solid-solution thin film was prepared on a Pt(111)/Ti/SiO$_{2}$/Si(100) substrate by using pulsed laser deposition (PLD) at different pressure, such as 10 mTorr, 30 mTorr, 50 mTorr, and 100 mTorr, and the crystal structure, the microstructure, the leakage current, and the ferroelectric properties were investigated. The 0.67BiFeO$_{3}$-0.33BaTiO$_{3}$ thin film deposited at 30 mTorr exhibited good ferroelectric properties with a large remnant polarization (2$P_{r}$ = 28 $\mu$C/cm$^{2}$) and a low coercive field (2$E_{c}$ = 342 kV/cm), which were due to the high (111) preferred orientation and the uniform large grain size.

Keywords: BiFeO$_{3}$, BaTiO$_{3}$, Pulsed lase deposition, Solid solution, Ferroelectic

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