High spatial resolution structure of (K,Na)NbO3 lead-free ferroelectric domains

Rubio-Marcos, Fernando; Campo, Adolfo del; López-Juárez, Rigoberto; Romero, J. J.; Fernández, J.F.

doi:10.1039/c2jm30483j

Cited by 99 publications

(89 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…27,28 At low temperatures, only the orthorhombic structure dominates and the internal stress generated diminished in accordance with the observed extrinsic response behavior. …”

Section: This Is the Post-print (Ie Final Draft Post-refereeing) Ofsupporting

confidence: 61%

“…The nucleation of the orthorhombic structure is restricted by the existing tetragonal domain configuration, and the domain configuration is resolved by alternating orthorhombic and tetragonal adjacent domains. 27,28 The change in the polarization direction of the orthorhombic structure converts FT 180º domains into non-180º domains at PPB. The domain configuration at PPB therefore allows a higher field-induced polarization because more directions are available to be oriented, and thus the material exhibits a higher irreversible extrinsic contribution.…”

Section: Fig 3 Relation Between the Increments Of The Imaginary (mentioning

confidence: 99%

See 1 more Smart Citation

Extrinsic response enhancement at the polymorphic phase boundary in piezoelectric materials

Ochoa

Esteves

Jones

et al. 2016

Applied Physics Letters

Self Cite

View full text Add to dashboard Cite

Polymorphic phase boundaries (PPBs) in piezoelectric materials have attracted significant interest in recent years, in particular because of the unique properties that can be found in their vicinity. However, to fully harness their potential as micro-nanoscale functional entities, it is essential to achieve reliable and precise control of their piezoelectric response, which is due to two contributions known as intrinsic and extrinsic. In this work we have used a (K,Na)NbO3-based lead-free piezoceramic as a model system to investigate the evolution of the extrinsic contribution around a PPB. X-ray diffraction measurements are performed over a wide range of temperatures in order to determine the structures and transitions. The relevance of the extrinsic contribution at the PPB region is evaluated by means of nonlinear dielectric response measurements. Though it is widely appreciated that certain intrinsic properties of ferroelectric materials increase as PPBs are approached, our results demonstrate that the extrinsic contribution also maximizes. An enhancement of the extrinsic contribution is therefore also responsible for improving the functional properties at the PPB region. Rayleigh's law is used to quantitatively analyze the nonlinear response. As a result, an evolution of the domain wall motion dynamics through the PPB region is detected. This work demonstrates that the extrinsic contribution at a PPB may have a dynamic role in leadfree piezoelectric materials, thereby exerting a far greater influence on their functional properties than that considered to date. a)

show abstract

“…27,28 At low temperatures, only the orthorhombic structure dominates and the internal stress generated diminished in accordance with the observed extrinsic response behavior. …”

Section: This Is the Post-print (Ie Final Draft Post-refereeing) Ofsupporting

confidence: 61%

Section: Fig 3 Relation Between the Increments Of The Imaginary (mentioning

confidence: 99%

Extrinsic response enhancement at the polymorphic phase boundary in piezoelectric materials

Ochoa

Esteves

Jones

et al. 2016

Applied Physics Letters

Self Cite

View full text Add to dashboard Cite

show abstract

“…From grain to grain, the most intense pair of Raman modes is either the one formed by the A g mode at 425 cm À 1 and the B g at 397 cm À 1 or the pair composed by the A g mode at 376 cm À 1 and the B g at 394 cm À 1 . [19] The difference in crystallographic orientation of each grain with respect to the incident radiation accounts for these variations in relative intensities [20,21].…”

Section: Resultsmentioning

confidence: 99%

Stabilization of cubic phase in dense Eu2O3 ceramics

2015

Self Cite

View full text Add to dashboard Cite

“…Nanodomains of alternate orthorhombic and tetragonal domains with a width of 20-50 nm were observed near polymorphic phase coexistence zone [19]. Rubio-Marcos et al [18] presented and discussed the spatial resolved structure of the ferroelectric domain existing in (K,Na)NbO 3 based ceramics studied by confocal Raman microscopy (CRM) coupled with atomic force microscopy. In this work, we presented domain configuration using a polarized light microscope.…”

Section: Ferroelectric Properties and Domain Configurationmentioning

confidence: 99%

“…So, the study of domain in KNN-LN and KNN-LT single crystals is critical for a better understanding of their properties. In the past years, a few papers dealing with the ferroelectric domains in KNN-based materials are reported in the literature [18,19]. Fu et al [19] investigated the composition-dependent domain morphology of (Na 0.52 K 0.48−x )(Nb 0.92−x Sb 0.08 )O 3 -xLiTaO 3 ceramics by means of transmission electron microscopy (TEM).…”

Section: Ferroelectric Properties and Domain Configurationmentioning

confidence: 99%

Preparation and Characterization of Lead-Free (K0.5Na0.5)NbO3-LiNbO3 and (K0.5Na0.5)NbO3-LiTaO3 Ferroelectric Single Crystals

Chu

Tailor

et al. 2014

Crystals

View full text Add to dashboard Cite

Lead-free (K 0.5 Na 0.5 )NbO 3 -LiNbO 3 (KNN-LN) and (K 0.5 Na 0.5 )NbO 3 -LiTaO 3 (KNN-LT) ferroelectric single crystals, with the dimensions of 11  11  5 mm 3 and 5  5  3 mm 3 , were grown successfully using the top-seeded solution growth (TSSG) method, respectively. The crystal structures were analyzed by means of X-ray diffraction, showing orthorhombic symmetry for KNN-LN single crystals and coexistence of orthorhombic and tetragonal symmetry for KNN-LT single crystals at room temperature. The orthorhombic-tetragonal (T O-T ) and tetragonal-cubic (T C ) phase transition temperatures are 195 °C and 420 °C for the KNN-LN single crystals, and 130 °C and 280 °C for KNN-LT single crystals, respectively. The remnant polarization (P r ) is 27.8 μC/cm 2 with a coercive field (E c ) of 17 kV/cm for KNN-LT single crystals. The two single crystals showed 90° domains with layers in (parallel) straight lines, while KNN-LT single crystals have a larger domain region. The actual stoichiometry deviates easily from the original composition in the process of crystal growth, thus, an appropriate nominal composition and optimized crystal growth method is desired to get high-quality crystals in the future.

show abstract

High spatial resolution structure of (K,Na)NbO3 lead-free ferroelectric domains

Cited by 99 publications

References 29 publications

Extrinsic response enhancement at the polymorphic phase boundary in piezoelectric materials

Extrinsic response enhancement at the polymorphic phase boundary in piezoelectric materials

Stabilization of cubic phase in dense Eu2O3 ceramics

Preparation and Characterization of Lead-Free (K0.5Na0.5)NbO3-LiNbO3 and (K0.5Na0.5)NbO3-LiTaO3 Ferroelectric Single Crystals

Contact Info

Product

Resources

About