Dielectric and tunable properties of Pb0.25BaxSr0.75−xTiO3 thin films fabricated by a modified sol–gel method

Sun, Xiaohua; Huang, Huiming; Wang, Shengxiang; Li, Meiya; Zhao, Xingzhong

doi:10.1016/j.tsf.2007.06.155

Cited by 21 publications

(12 citation statements)

References 25 publications

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“…It is considered as one of the most potential candidate materials for the future tunable microwave device components, such as phase shifters, filters, varactors, delay lines, etc. [1][2][3][4]. However, significant reductions in loss at high frequencies together with the improved dielectric tunability are needed for their realization in devices.…”

Section: Introductionmentioning

confidence: 99%

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The effect of Mg doping on the dielectric and tunable properties of Pb0.3Sr0.7TiO3 thin films prepared by sol–gel method

Sun

Hou

et al. 2013

Appl. Phys. A

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Mg doped Pb 0.3 Sr 0.7 TiO 3 (PST) thin films were fabricated by the sol-gel method on a Pt/Ti/SiO 2 /Si substrate. The microstructure, surface morphology, dielectric and tunable properties of PST thin films were investigated as a function of Mg concentration. It is found that proper Mg doping dramatically improves the dielectric loss (0.0088 @ 1 MHz), furthermore, the crystallinity, dielectric constant, and tunability of films simultaneously decrease with the increase of Mg content. The 2 mol% Mg doped PST thin film shows the highest figure of merit (FOM) value of 36.8 for its the smallest dielectric loss and upper tunability. The dependence of Rayleigh coefficient on the doping concentration was examined, which indicated that the reduction of dielectric constant and tunability of films should be related to the Mg Ti -V •• O defect dipoles pinning the domain wall motion of residual polar clusters in PST.

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Section: Introductionmentioning

confidence: 99%

“…The Rayleigh law was used to characterize the effect of Mg as an acceptor dopant on the defects, polarization and dielectric properties of films. 4 ] as source materials. Glacial acetic acid, deionized water and 2-methoxyethanol were selected as solvents.…”

Section: Introductionmentioning

confidence: 99%

The effect of Mg doping on the dielectric and tunable properties of Pb0.3Sr0.7TiO3 thin films prepared by sol–gel method

Sun

Hou

et al. 2013

Appl. Phys. A

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“…[1][2][3][4][5][6] Perovskite structure has been one of the most versatile structures for tailoring the properties of materials. From the family of perovskite structured ferroelectrics, A 2+ B 4+ O 3 type compounds that contain Ti 4+ , solid solutions of BariumStrontium Titanate, Lead-Barium Titanate, Lead-Strontium Titanate have been investigated extensively [7,8]. Perovskite materials based on lead titanate (PbTiO 3 -PT) are especially relevant as functional layers in piezoelectric, ferroelectric, pyroelectric and other devices and are found to emerge as materials of great importance due to their rich physical properties [9].…”

Section: Introductionmentioning

confidence: 99%

“…Among perovskite ferroelectric systems, PT, BT, ST, BST, PST, and PBT have been well studied by many researchers [10]. Literature discloses that the substitution of Ba 2+ in PT reduces the lattice anisotropy and lead to different microstructure resulting in different dielectric behavior [7,8]. Similarly, Sr 2+ substitution in PT offers a good control over dielectric and piezoelectric properties, Curie temperature, lattice anisotropy, grain segregation etc.…”

Section: Introductionmentioning

confidence: 99%

Effect of Ba2+ – Sr2+ co-substitution on the structural and dielectric properties of Lead Titanate

Bardapurkar¹,

Barde²,

Thakur

et al. 2012

J Electroceram

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Growing interest in developing new materials for device applications led to study of ferroelectric oxides in a wide range and variety of compositions. In the present work, polycrystalline samples of lead barium strontium titanate (Pb 1-x Ba 0.5x Sr 0.5x TiO 3 ) solid solution system have been synthesized. Phase formation studies and crystal structure analysis were carried out by X ray diffractometry at room temperature, which suggested formation of single phase compound with tetragonal structure up to x00.8 and cubic structure for x01.0. The XRD pattern has been analyzed by employing Rietveld method. The phase transition in the system was confirmed by Differential Scanning Calorimetry (DSC). Samples with 0.0≤x≤0.8 are in ferroelectric state whereas with x01.0 is found to be in paraelectric state at room temperature. Co-substitution of Ba 2+ and Sr 2+ into lead titanate shows reduction in anisotropy as well as porosity. The dielectric studies of the system as a function of temperature and frequency were carried out in the range 323 K to 773 K and 100 Hz to 1 MHz respectively. Variation of dielectric constant and loss tangent with temperature shows peaking effect near Curie temperature. Frequency dependant dielectric studies clearly show that the dielectric constant and loss tangent decrease exponentially with increased frequency.

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“…Over the past few years, some preliminary results on the microstructure and dielectric properties of PST ceramics and thin films were reported [14][15][16][17][18]. Among these properties, the polarization-electric field (P-E) relation is very interesting.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and antiferroelectric-like behavior of PbxSr1−xTiO3 ceramics

Chen

Yang

Zhang

et al. 2009

Journal of Alloys and Compounds

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Dielectric and tunable properties of Pb0.25BaxSr0.75−xTiO3 thin films fabricated by a modified sol–gel method

Cited by 21 publications

References 25 publications

The effect of Mg doping on the dielectric and tunable properties of Pb0.3Sr0.7TiO3 thin films prepared by sol–gel method

The effect of Mg doping on the dielectric and tunable properties of Pb0.3Sr0.7TiO3 thin films prepared by sol–gel method

Effect of Ba2+ – Sr2+ co-substitution on the structural and dielectric properties of Lead Titanate

Microstructure and antiferroelectric-like behavior of PbxSr1−xTiO3 ceramics

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