Ferroelectric Q-phase in a NaNbO3 epitaxial thin film

Yuzyuk, Yu. I.; Shakhovoy, Roman; Raevskaya, S. I.; Raevski, I. P.; Marssi, M. El; Karkut, M.G.; Simon, Patrick

doi:10.1063/1.3437090

Cited by 37 publications

(25 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The difference [ δn T = n ( T ) − n 0 ( T 0 )] is found to be negative for temperatures below T 0 in all films (figure 4(b)), confirming the low-temperature ferroelectric state in the NaNbO 3 films. The observation of ferroelectric behaviour is consistent with the previous theoretical and experimental studies of epitaxial NaNbO 3 films [9, 16, 17, 18]. …”

Section: Resultssupporting

confidence: 91%

Ambience-sensitive optical refraction in ferroelectric nanofilms of NaNbO₃

Tyunina

Chvostová

Pacherová

et al. 2014

Science and Technology of Advanced Materials

View full text Add to dashboard Cite

Optical index of refraction n is studied by spectroscopic ellipsometry in epitaxial nanofilms of NaNbO3 with thickness ∼10 nm grown on different single-crystal substrates. The index n in the transparency spectral range (n ≈ 2.1 – 2.2) exhibits a strong sensitivity to atmospheric-pressure gas ambience. The index n in air exceeds that in an oxygen ambience by δn ≈ 0.05 – 0.2. The thermo-optical behaviour n(T) indicates ferroelectric state in the nanofilms. The ambience-sensitive optical refraction is discussed in terms of fundamental connection between refraction and ferroelectric polarization in perovskites, screening of depolarizing field on surfaces of the nanofilms, and thermodynamically stable surface reconstructions of NaNbO3.

show abstract

Section: Resultssupporting

confidence: 91%

Ambience-sensitive optical refraction in ferroelectric nanofilms of NaNbO₃

Tyunina

Chvostová

Pacherová

et al. 2014

Science and Technology of Advanced Materials

View full text Add to dashboard Cite

show abstract

“…[33][34][35] Crystallographically, the unit cells of P and Q phases are quadrupled and doubled, respectively, in [010] direction of the prototype cubic perovskite unit cell. 18 Subsequently, superlattice diffractions with 1 = 4 {010}-type, for P phase, and 1 = 2 {010}-type, for Q phase, are manifested in the electron diffraction patterns.…”

Section: Resultsmentioning

confidence: 99%

Strategy for stabilization of the antiferroelectric phase (Pbma) over the metastable ferroelectric phase (P21ma) to establish double loop hysteresis in lead-free (1−x)NaNbO3-xSrZrO3 solid solution

Guo

Shimizu

Mizuno

et al. 2015

Journal of Applied Physics

View full text Add to dashboard Cite

Large strain response based on relaxor-antiferroelectric coherence in Bi0.5Na0.5TiO3-SrTiO3-(K0.5Na0.5)NbO3 solid solutions A new lead-free antiferroelectric solid solution system, (1Àx)NaNbO 3 -xSrZrO 3 , was rationalized through noting the crystal chemistry trend, of decreasing the tolerance factor and an increase in the average electronegativity of the system. The SrZrO 3 doping was found to effectively stabilize the antiferroelectric (P) phase in NaNbO 3 without changing its crystal symmetry. Preliminary electron diffraction and polarization measurements were presented which verified the enhanced antiferroelectricity. In view of our recent report of another lead-free antiferroelectric system (1Àx)NaNbO 3 -xCaZrO 3 [H. Shimizu et al. "Lead-free antiferroelectric: xCaZrO 3 -(1Àx)NaNbO 3 system (0 x 0.10)," Dalton Trans. (published online)], the present results point to a general strategy of utilizing tolerance factor to develop a broad family of new lead-free antiferroelectrics with double polarization hysteresis loops. We also speculate on a broad family of possible solid solutions that could be identified and tested for this important type of dielectric. V C 2015 AIP Publishing LLC. [http://dx.

show abstract

“…NaNbO 3 based materials have attracted much interest from scientific as well as potentially practical point of view due to their promising ferro-and piezoelectric properties, 25 transitions and interesting electric behavior under the influence of applied electric field or lattice strain. [26][27][28][29][30] However, NaNbO 3 undergoes a phase transition from a para-to an antiferroelectric phase at 633 K and crystallizes at RT in the orthorhombic P phase 28 (space group Pbcm) in contrast to the above mentioned materials.…”

mentioning

confidence: 93%

Ferroelectric domain structure of anisotropically strained NaNbO3 epitaxial thin films

Schwarzkopf

Braun

Schmidbauer

et al. 2014

Journal of Applied Physics

View full text Add to dashboard Cite

NaNbO3 thin films have been grown under anisotropic biaxial strain on several oxide substrates by liquid-delivery spin metalorganic chemical vapor deposition. Compressive lattice strain of different magnitude, induced by the deposition of NaNbO3 films with varying film thickness on NdGaO3 single crystalline substrates, leads to modifications of film orientation and phase symmetry, which are similar to the phase transitions in Pb-containing oxides near the morphotropic phase boundary. Piezoresponse force microscopy measurements exhibit large out-of-plane polarization components, but no distinctive domain structure, while C-V measurements indicate relaxor properties in these films. When tensile strain is provoked by the epitaxial growth on DyScO3, TbScO3, and GdScO3 single crystalline substrates, NaNbO3 films behave rather like a normal ferroelectric. The application of these rare-earth scandate substrates yields well-ordered ferroelectric stripe domains of the type a1/a2 with coherent domain walls aligned along the [001] substrate direction as long as the films are fully strained. With increasing plastic lattice relaxation, initially, a 2D domain pattern with still exclusively in-plane electric polarization, and finally, domains with in-plane and out-of-plane polar components evolve.

show abstract

Ferroelectric Q-phase in a NaNbO3 epitaxial thin film

Cited by 37 publications

References 20 publications

Ambience-sensitive optical refraction in ferroelectric nanofilms of NaNbO₃

Ambience-sensitive optical refraction in ferroelectric nanofilms of NaNbO₃

Strategy for stabilization of the antiferroelectric phase (Pbma) over the metastable ferroelectric phase (P21ma) to establish double loop hysteresis in lead-free (1−x)NaNbO3-xSrZrO3 solid solution

Ferroelectric domain structure of anisotropically strained NaNbO3 epitaxial thin films

Contact Info

Product

Resources

About

Ferroelectric Q-phase in a NaNbO3 epitaxial thin film

Cited by 37 publications

References 20 publications

Ambience-sensitive optical refraction in ferroelectric nanofilms of NaNbO3

Ambience-sensitive optical refraction in ferroelectric nanofilms of NaNbO3

Strategy for stabilization of the antiferroelectric phase (Pbma) over the metastable ferroelectric phase (P21ma) to establish double loop hysteresis in lead-free (1−x)NaNbO3-xSrZrO3 solid solution

Ferroelectric domain structure of anisotropically strained NaNbO3 epitaxial thin films

Contact Info

Product

Resources

About

Ambience-sensitive optical refraction in ferroelectric nanofilms of NaNbO₃

Ambience-sensitive optical refraction in ferroelectric nanofilms of NaNbO₃