Nanodomain structures formation during polarization reversal in uniform electric field in strontium barium niobate single crystals

Shur, V. Ya.; Shikhova, V. A.; Ievlev, Anton V.; Zelenovskiy, P. S.; Neradovskiy, Maxim; Pelegov, D. V.; Ivleva, L. I.

doi:10.1063/1.4754511

Cited by 30 publications

(23 citation statements)

References 23 publications

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“…As a result it is possible to choose the Raman spectroscopy combined with confocal microscopy for domain visualization in the bulk of LN, LT and SBN crystals with submicron resolution. 20,21,25,26 CRM is a new method for domain visualization which combines analytical abilities of a Raman spectroscopy and a high spatial resolution (below the diffraction limit), inherent to the confocal microscopy. It has been applied recently for domain visualization in LN and LT crystals both at the surface and in the bulk.…”

Section: Confocal Raman Microscopymentioning

confidence: 99%

Formation of self-assembled nanodomain structures in single crystals of uniaxial ferroelectrics lithium niobate, lithium tantalate and strontium–barium niobate

et al. 2014

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The formation and evolution of the self-assembled nanodomain structures during polarization reversal have been comparatively analyzed in single crystals of various uniaxial ferroelectrics: LiNbO 3 (LN), LiTaO 3 (LT) and Sr x Ba 1Àx Nb 2 O 6 (SBN). Several experimental methods have been used for visualization of the micro-and nanodomain patterns. The static domain images have been obtained by optical microscopy and piezoresponse force microscopy. The Raman confocal microscopy allowed us to obtain the domain images in the bulk. The equilibrium slow switching with effective screening resulted in growth of polygon-shaped microdomains: hexagons in LN, triangles in LT and squares in SBN, which corresponds to crystal symmetry. Switching in nonequilibrium conditions (noneffective screening of depolarization field) brings to appearance of similar nanodomain structures in all studied crystals as a result of different processes: (1) formation of nanodomain ensembles, (2) discrete switching, (3) incomplete merging and (4) spontaneous backswitching.

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Section: Confocal Raman Microscopymentioning

confidence: 99%

Formation of self-assembled nanodomain structures in single crystals of uniaxial ferroelectrics lithium niobate, lithium tantalate and strontium–barium niobate

et al. 2014

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“…These conditions must be further investigated by e.g. in-situ real space domain mapping [9], [23], [57]. Thus, our results extend the list of possible connections between ferroic order and functional properties of materials.…”

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confidence: 77%

“…For example, piezoresponse force microscopy mainly probes surfaces; transmission electron microscopy addresses nano-meter length-scales; optical methods of domain imaging (e.g. [8,9]) are insensitive to lattice parameters. X-ray and neutron diffraction methods access macroscopic, microscopic and mesoscopic length scales; they have been exploited for understanding of the ferroelectrics and relaxor systems (e.g.…”

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confidence: 99%

Time-Resolved X-Ray Diffraction Reveals the Hidden Mechanism of High Piezoelectric Activity in a Uniaxial Ferroelectric

et al. 2015

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High piezoelectric activity of many ferroelectrics has been the focus of numerous recent studies. The structural origin of this activity remains poorly understood due to a lack of appropriate experimental techniques and mixing of different mechanisms related to ferroelectricity and ferroelasticity. Our work reports on the study of a uniaxial Sr 0.5 Ba 0.5 Nb 2 O 6 ferroelectric where the formation of regions with different spontaneous strains is ruled out for the symmetry reason and where the interrelation between piezoelectricity and ferroelectricity can be inspected in the isolated fashion. We performed X-ray diffraction experiment on a single crystalline sample under alternating electric field and observed unknown hidden-in-the-bulk mechanism, which suggests that the highest piezoelectric activity is realized in the volumes where nucleation of small ferroelectric domains takes place. This new mechanism creates a novel roadmap for designing materials with enhanced piezoelectric properties.Electromechanical coupling is the ability of some solids to convert mechanical energy into electrical and vice versa. Solids exhibiting linear electromechanical coupling are called piezoelectrics: they may become electrically polarized under a mechanical stress or mechanically deformed under an electric field. Piezoelectricity closely co-exists with ferroelectricity -the ability to switch spontaneous polarization states under an electric field. This letter reports on the observation of a new piezoelectric activity mechanism, suggesting that it may appear in a purely uniaxial ferroelectric in the form of correlation between lattice parameter and domains size. We observed this mechanism by time-resolved synchrotron Xray diffraction on SBN50 single crystals under alternating electric field. We have chosen SBN50 as a model uniaxial ferroelectric whose para-and ferroelectric phases are tetragonal The time-resolved X-ray diffraction experiment was performed using a custom-built stroboscopic data-acquisition system, which operates on the principle of a multi-channel analyser and qualifies for the investigation of repetitive processes down to the nanosecond time scale. The details of this technique are described elsewhere [4], [33][34][35] and briefly summarized in the supplemental materials. It has already been applied to the determination of small (~10 -4 Å) electric field induced bond distortions [36][37][38][39][40][41][42], the determination of

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“…In particular, piezoresponse force microscopy (PFM) revealed maze-type domain structures with characteristic sizes of about a hundred nanometers 11 in thermally depolarized crystals at room temperature, as well as its evolution at elevated temperatures 12 . The micro- and nanodomain structures formed during polarization reversal in a uniform field were also studied using PFM 13 .…”

Section: Introductionmentioning

confidence: 99%

Temperature Effect on the Stability of the Polarized State Created by Local Electric Fields in Strontium Barium Niobate Single Crystals

Shur

Shikhova

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et al. 2017

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The stability of ferroelectric domain patterns at the nanoscale has been a topic of much interest for many years. We investigated the relaxation of the polarized state created by application of a local electric field using a conductive tip of a scanning probe microscope for the model uniaxial relaxor system SrxBa1−xNb2O6 (SBN) in its pure and Ce-doped form. The temporal relaxation of the induced PFM contrast was measured at various temperatures. The average value of the induced contrast decreases during heating for all investigated crystals. Below the freezing temperature the induced state remains stable after an initial relaxation. Above the freezing temperature the induced state is unstable and gradually decays with time. The stability of the induced state is strongly affected by the measuring conditions, so continuous scanning results in a faster decay of the poled domain. The obtained effects are attributed to a decrease of the induced polarization and backswitching of the polarized area under the action of the depolarization field.

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Nanodomain structures formation during polarization reversal in uniform electric field in strontium barium niobate single crystals

Cited by 30 publications

References 23 publications

Formation of self-assembled nanodomain structures in single crystals of uniaxial ferroelectrics lithium niobate, lithium tantalate and strontium–barium niobate

Formation of self-assembled nanodomain structures in single crystals of uniaxial ferroelectrics lithium niobate, lithium tantalate and strontium–barium niobate

Time-Resolved X-Ray Diffraction Reveals the Hidden Mechanism of High Piezoelectric Activity in a Uniaxial Ferroelectric

Temperature Effect on the Stability of the Polarized State Created by Local Electric Fields in Strontium Barium Niobate Single Crystals

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