Improved dielectric and ferroelectric properties in Ti-doped BiFeO3–PbTiO3 thin films prepared by pulsed laser deposition

Chen, Ling; Ren, Wei; Zhu, Wenyi; Ye, Zuo‐Guang; Shi, Peng; Chen, Xiaofeng; Wu, Xiumei; Yao, Xi

doi:10.1016/j.tsf.2009.11.072

Cited by 30 publications

(22 citation statements)

References 20 publications

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“…In general, the BFO epitaxial films possess a larger polarization, 87,97,295,349 while the polycrystalline films often suffer from a high electrical leakage due to Fe valence fluctuation and the existence of some secondary phases. 285 Among the many methods proposed to overcome the leakage current in polycrystalline BFO thin films, one is to develop the BFO solid solutions with certain ABO 3 structured perovskite oxides 296,301,304,324,[350][351][352][353][354][355][356][357][358] (e.g., PbTiO 3 , 296,301,304,324,[350][351][352][353][354] Bi 0.50 Na 0.50 TiO 3…”

Section: Addition Of Abomentioning

confidence: 99%

Multiferroic bismuth ferrite-based materials for multifunctional applications: Ceramic bulks, thin films and nanostructures

Fan

Xiao

et al. 2016

Progress in Materials Science

496

176

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Among the different types of multiferroic compounds, bismuth ferrite (BiFeO 3 ; BFO) stands out because it is perhaps the only one being simultaneously magnetic and strongly ferroelectric at room temperature. Therefore, in the past decade or more, extensive research has been devoted to BFO-based materials in a variety of different forms, including ceramic bulks, thin films and nanostructures. Ceramic bulk BFO and their solid solutions with other oxide perovskite compounds show excellent ferroelectric and piezoelectric properties and are thus promising candidates for lead-free ferroelectric and piezoelectric devices. BFO thin films, on the other hand, exhibit versatile structures and many intriguing properties, particularly the robust ferroelectricity, the inherent magnetoelectric coupling, and the emerging photovoltaic effects. BFO-based nanostructures are of great interest owing to their size effect-induced structural modification and enhancement in various functional behaviors, such as magnetic and photocatalytic properties. Although to date several

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Section: Addition Of Abomentioning

confidence: 99%

Multiferroic bismuth ferrite-based materials for multifunctional applications: Ceramic bulks, thin films and nanostructures

Fan

Xiao

et al. 2016

Progress in Materials Science

496

176

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“…More recently Chen reported films deposited by PLD of 0.72Bi(Fe 1-x Ti x )O 3 -0.28PbTiO 3 (x = 0 and 0.02) on Pt/TiO x /SiO 2 /Si substrates. Although P-E ferroelectric hysteresis loops were not completely saturated a large remnant polarization of 80 µCcm -2 was obtained in the doped films at room temperature [19,20].…”

mentioning

confidence: 91%

Microstructure development of BiFeO3–PbTiO3 films deposited by pulsed laser deposition on platinum substrates

2014

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BiFeO 3 -PbTiO 3 films around the morphotropic phase boundary were deposited by pulsed laser deposition on polycrystalline Pt/TiO x /SiO 2 /Si substrates. X-ray analysis confirms that 0.6BiFeO 3 -0.4PbTiO 3 films are (001) tetragonal preferentially orientated due to lattice matching with the underlying substrate.The misfit strain at the substrate -film interface is relieved by a ~19% orientation transformation from (001) to (100) due to the difference in lattice mismatch at the substrate-film interface and thermal expansion coefficients of the substrate and deposited film. 0.7BiFeO 3 -0.3PbTiO 3 films are mixed phase rhombohedral-tetragonal with (001) / (111) preferential orientated due to the lattice match to the (111) and (100) of the underlying platinum as well as being close to the morphotropic phase boundary. Inconsistent structural and electrical properties in reported BiFeO 3 -PbTiO 3 films are explained in terms of film morphology and diffusion of bismuth into platinum. Films below ~220 nm thickness produce short circuits due to a Volmer-Weber growth mechanism which results in physical defects within the films. Films above this critical thickness also produce variable electrical properties due to diffusion of bismuth into the underlying platinum electrode which has been confirmed by energy dispersive X-ray spectroscopy.

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“…Careful choice of end members and their compositions is required. Although ferroelectric epitaxial solid solution thin films have been reported so far [24][25][26][27][28], the idea of enhancing ferroelectric and dielectric properties in Pb-free ferroelectrics films by selecting the right chemistry for defect reduction at the same time as enhancement of the temperature of the dielectric maximum has not been considered to date. In this study, we propose and demonstrate a way to do this.…”

Section: Introductionmentioning

confidence: 99%

Strongly enhanced dielectric and energy storage properties in lead-free perovskite titanate thin films by alloying

et al. 2018

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A B S T R A C TLead-free perovskite oxide thin films prepared by alloying of titanates and materials with lower melting points are shown to have enhanced ferroelectric and dielectric properties. BaTiO 3 (or SrTiO 3 ) with 25% addition of BiFeO 3 has much improved crystalline perfection because of the lower melting point of the BiFeO 3 giving enhanced growth kinetics. The maximum dielectric peak temperature of BaTiO 3 is increased by~200°C and leakage currents are reduced by up to a factor of~100. The loss tangent reduces up to 300°C, with a factor of > 14 reduction at room temperature. The dielectric breakdown strength is higher by a factor of~3 (> 2200 kV cm ) and from room temperature up to 500°C the dielectric constant is > 1000. Also, a low variation of dielectric constant of~9% from room temperature to 330°C is obtained, compared to~110% for BaTiO 3 . The maximum polarization (P max ) is double that of BaTiO 3 , at 125.3 μC cm −2. The film has high energy storage densities of > 52 J cm −3 at 2050 kV cm −1 , matching Pb-based ferroelectric films. The strongly improved performance is important for applications in energy storage and in high temperature (up to 300°C) capacitors as well as wider application in other electronic and energy technologies.

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Improved dielectric and ferroelectric properties in Ti-doped BiFeO3–PbTiO3 thin films prepared by pulsed laser deposition

Cited by 30 publications

References 20 publications

Multiferroic bismuth ferrite-based materials for multifunctional applications: Ceramic bulks, thin films and nanostructures

Multiferroic bismuth ferrite-based materials for multifunctional applications: Ceramic bulks, thin films and nanostructures

Microstructure development of BiFeO3–PbTiO3 films deposited by pulsed laser deposition on platinum substrates

Strongly enhanced dielectric and energy storage properties in lead-free perovskite titanate thin films by alloying

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