Strontium–barium niobate single crystals, growth and ferroelectric properties

Łukasiewicz, T.; Świrkowicz, M.; Dec, J.; Hofman, W.; Szyrski, W.

doi:10.1016/j.jcrysgro.2007.11.233

Cited by 116 publications

(102 citation statements)

References 21 publications

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“…The doping leads to generation of additional point defects, which induce a local field, thus promotes domain nucleation. It was reported that dislocation density increased by two orders of magnitude in SBN:61 crystals with dopants of Ce and Cr ions, in comparison to undoped samples [31]. It seems also to be reflected in a very fine, irregular domain structure during polarization reversal in the examined Ni doped SBN:61 crystal samples.…”

Section: Discussionmentioning

confidence: 79%

Effect of Ni doping on ferroelectric and dielectric properties of strontium barium niobate crystals

et al. 2011

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The influence of Ni doping on the ferroelectric and dielectric properties have been examined in Sr 0.61 Ba 0.39 Nb 2 O 6 (SBN:61) relaxor crystals. The dopants introduced into SBN:61 crystals promote the switching process by reducing the value of threshold nucleation field, and thus coercive field. We present real-time studies of domain nucleation and growth processes in doped SBN:61 by the nematic liquid crystal (NLC) decoration technique. The broad phase transition and low-frequency dielectric dispersion that are exhibited by doped SBN:61 samples have a strong link to the configuration of the ferroelectrics microdomains, which in turn is strongly determined by Ni ions concentration.

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Section: Discussionmentioning

confidence: 79%

Effect of Ni doping on ferroelectric and dielectric properties of strontium barium niobate crystals

et al. 2011

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“…CBN28 crystals were grown by the Czochralski method [32]. Single crystals were cut into plates with a size of 5×5 mm 2 and thickness of 1 mm along the [100] and [001] directions (a and c plates, respectively) with the two surfaces being polished to optical quality.…”

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confidence: 99%

Critical slowing down and elastic anomaly of uniaxial ferroelectricCa0.28Ba0.72Nb2O6crystals with tungsten bronze structure

et al. 2014

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The ferroelectric phase transition of uniaxial Ca 0.28 Ba 0.72 Nb 2 O 6 single crystals with a moderate effective charge disorder was investigated by Brillouin scattering to clarify the dynamic properties. In the tetragonal paraelectric phase a remarkable softening of the sound velocity of the longitudinal acoustic mode and a significant increase in the sound attenuation were observed close to the Curie temperature T C = 527 K. The intermediate temperature T * ∼ 640 K and the Burns temperature T B ∼ 790 K were determined from the temperature variation in the sound attenuation. The intense broad central peak (CP) caused by polarization and strain fluctuations due to polar nanoregions was clearly observed in the vicinity of T C . The relaxation time determined by the CP width clearly shows critical slowing down towards T C , reflecting a weakly first-order phase transition under weak random fields.

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“…Accurate temperature measurements of the lattice parameters allowed to determine the phase transition temperature [10]. The temperature was confirmed in measurements of electric susceptibility as a function of temperature and frequency [2].…”

Section: Methodsmentioning

confidence: 92%

“…As a subject of our studies we used samples prepared from a high quality single crystal of SBN40 (Sr x Ba 1−x Nb 2 O 6 , where x = 0.40) obtained by the Czochralski method [2]. The samples were made from plates used earlier in precise lattice parameter measurements.…”

Section: Methodsmentioning

confidence: 99%

“…In ferroelectric phase, SBN has the 4mm point group symmetry, which transforms to centrosymmetric 4/mmm point group above T C . They also exhibit gradual crossover from conventional ferroelectric (SBN35) into utmost relaxor (SBN72) behavior [2]. So far, using the four-circle diffractometry the single crystals with a following compositions: SBN34, SBN47, SBN61, SBN82 [3], SBN50 [4] and SBN75 [5,6] were investigated.…”

Section: Introductionmentioning

confidence: 99%

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Crystal Structure of the High Temperature Phase of Strontium Barium Niobate

et al. 2016

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Pure and undoped strontium-barium niobate Sr0.40Ba0.60Nb2O6 (SBN40) single crystals grown by the Czochralski method were investigated by single crystal X-ray diffraction methods. The study below TC (429 K for SBN40) confirmed the structure with P 4bm space group. Above this temperature the structure transforms into the paraelectric, centrosymmetric one with P 4/mbm space group. Analysis of the recorded diffraction patterns allowed to observe several signs of crystal structure modulation. On the registered diffraction images satellite reflections were found. A modulation vector q = (δ, ±δ, ), where δ = 0.3075(6) (at room temperature) was found and it was similar to that occurring in the SBN61. In addition, above the phase transition temperature on the (hk) planes with l integer a weak diffuse scattering was observed.

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Strontium–barium niobate single crystals, growth and ferroelectric properties

Cited by 116 publications

References 21 publications

Effect of Ni doping on ferroelectric and dielectric properties of strontium barium niobate crystals

Effect of Ni doping on ferroelectric and dielectric properties of strontium barium niobate crystals

Critical slowing down and elastic anomaly of uniaxial ferroelectricCa0.28Ba0.72Nb2O6crystals with tungsten bronze structure

Crystal Structure of the High Temperature Phase of Strontium Barium Niobate

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