A study of positional disorder in strontium barium niobate

Trubelja, Miriam P.; Ryba, E.; Smith, Deane K.

doi:10.1007/bf00357850

Cited by 84 publications

(61 citation statements)

References 8 publications

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“…Second, the lattice parameters of SBN thin film vary with a change of composition. From the XRD measurement of sol-gel-derived SBN thin films from other papers, 15,19 while the calculated lattice constant along the c axis decreases from 3.941 to 3.832 Å as Sr content in the film composition increases, the lattice constant along a axis decreases from 12.5 to 12.37 Å. Therefore, the lattice mismatch between the film and the substrate increases from 1.07% to 1.31% as Sr content in the film increases, as shown in Fig.…”

Section: +mentioning

confidence: 99%

Preparation and characteristics of seeded epitaxial (Sr,Ba)Nb₂O₆ optical waveguide thin films using sol-gel method

2001

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Highly c-axis-oriented (Sr,Ba)Nb 2 O 6 (SBN) films were grown on a seeded MgO(100) substrate via sol-gel method. The substrate was preseeded with epitaxial islands of SBN made by breaking up a continuous film into single-crystal islands by pores. Since the number of epitaxial nuclei was increased at the interface between the film and the substrate, the film on a seeded substrate had better highly orientation than that on unseeded substrate. The film having low Sr content exhibited better epitaxial growth because of the distorted unit-cell network and the change of lattice parameters of SBN thin film. For obtaining excellent optical properties, SBN:75 film was prepared on MgO substrate with SBN:25 composition seed layer. Because of low birefringence of refractive indices in the film having high Sr content, the optical scattering loss by the anisotropy of refractive indices was suppressed.

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Section: +mentioning

confidence: 99%

Preparation and characteristics of seeded epitaxial (Sr,Ba)Nb₂O₆ optical waveguide thin films using sol-gel method

2001

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“…Since there are only five Sr and Ba ions in one unit cell, one of the six A1 and A2 positions is vacant. While the M1 and M2 positions are fully occupied by Nb, the C positions may contain only ions with smaller ionic radii and are therefore not occupied in SBN [6].…”

Section: Introductionmentioning

confidence: 99%

Phase relations and lattice parameters in the system SrO–BaO–Nb2O5 focusing on SBN (SrxBa1−xNb2O6)

Nikasch

Göbbels

2004

Journal of Crystal Growth

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“…Strontium Barium Niobate is a non-lead based ferroelectric material having tetragonal tungsten bronze structure. It has the general formula of Sr x Ba 1−x Nb 2 O 6 (0.25 ≤ x ≤ 0.75) with a unit-cell formula of [(A1) 2 (A2) 4 C 4 ][(B1) 2 (B2) 8 ]O 30 and its physical properties change with composition [1]. In recent years it has gained much attention because of its potential application largely in electro-optic [2,3], piezoelectric [4] and Surface Acoustic Wave (SAW) devices [5] owing to its large pyroelectric coefficient [6] and photorefractrive properties [7,8].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Sr0.5Ba0.5Nb2O6 by Coprecipitation Method?Dielectric and Microstructural Characteristics

et al. 2004

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Sr 0.5 Ba 0.5 Nb 2 O 6 (SBN50) has been synthesized by coprecipitation method using Sr(NO 3 ) 2 , Ba(NO 3 ) 2 and Nb-oxalate as precursors and ammonium hydroxide as precipitant. Calcination at 1150 • C resulted in pure SBN50 phase (XRD) and nano powder with size varying between 100-250 nm (TEM). The average grain size (SEM) in the sintered pellets ranged from 2.5 to 5 µm as the sintering temperature varied from 1250 to 1350 • C. The maximum sintered density was observed to be 93% of ρ th . The plot of dielectric constant vs. temperature clearly showed a shift of dielectric maxima (ε max ) with frequency, indicating the relaxor nature of SBN50. The room temperature dielectric constant (ε RT > 2300) observed for all these samples is higher compared to the earlier reported values (ε RT ∼ 1500). The T c (for 1 KHz) varied from 47-60 • C depending on the sintering conditions. The hystersis loops were recorded at various temperatures. The maximum saturation polarization for the unpoled pellets was found to be 2.3 µC/cm 2 when sintered at 1350 • C. The improvement in dielectric and ferroelectric behavior is attributed to the enhanced homogeneity attained by the coprecipitation synthesis route used in the present study. Correlations between microstructure (sintering conditions) and dielectric behavior is explored.

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A study of positional disorder in strontium barium niobate

Cited by 84 publications

References 8 publications

Preparation and characteristics of seeded epitaxial (Sr,Ba)Nb₂O₆ optical waveguide thin films using sol-gel method

Preparation and characteristics of seeded epitaxial (Sr,Ba)Nb₂O₆ optical waveguide thin films using sol-gel method

Phase relations and lattice parameters in the system SrO–BaO–Nb2O5 focusing on SBN (SrxBa1−xNb2O6)

Synthesis of Sr0.5Ba0.5Nb2O6 by Coprecipitation Method?Dielectric and Microstructural Characteristics

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A study of positional disorder in strontium barium niobate

Cited by 84 publications

References 8 publications

Preparation and characteristics of seeded epitaxial (Sr,Ba)Nb2O6 optical waveguide thin films using sol-gel method

Preparation and characteristics of seeded epitaxial (Sr,Ba)Nb2O6 optical waveguide thin films using sol-gel method

Phase relations and lattice parameters in the system SrO–BaO–Nb2O5 focusing on SBN (SrxBa1−xNb2O6)

Synthesis of Sr0.5Ba0.5Nb2O6 by Coprecipitation Method?Dielectric and Microstructural Characteristics

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Preparation and characteristics of seeded epitaxial (Sr,Ba)Nb₂O₆ optical waveguide thin films using sol-gel method

Preparation and characteristics of seeded epitaxial (Sr,Ba)Nb₂O₆ optical waveguide thin films using sol-gel method