Ferroelectricity of Sn-doped SrTiO<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mrow /><mml:mn>3</mml:mn></mml:msub></mml:math>perovskites with tin at both<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>A</mml:mi></mml:math>and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>B</mml:mi></mml:math>sites

Suzuki, Shoichiro; Honda, Akira; Iwaji, Naoki; Higai, Shin’ichi; Andõ, Akira; Takagi, Hiroshi; Kasatani, Hirofumi; Deguchi, K.

doi:10.1103/physrevb.86.060102

Cited by 35 publications

(31 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The presence of this electric polarization suggests the existence of Sn 2+ in the A-site of SrTiO 3 lattice in agreement with our findings from X-ray diffraction. 15 The deviation of polarization direction from the [0 0 1] pseudocubic direction, which is predicted for SnTiO 3 , indicates that the off-centered Sn 2+ ions in the A-site can introduce a distortion in its local SrTiO 3 lattice and thus lower the symmetry to the monoclinic phase. Additional temperaturedependent SHG measurements on another sample with smaller Sn-content, x/2 = 0.03, also showed a polar behavior indicating the presence of Sn 2+ in a low-alloyed sample.…”

confidence: 99%

“…For example, Sn 2+ located on the A-sites in BaSnO 3 forms an undesirable anti-site defect, whereas a presence of a small a Author to whom correspondence should be addressed. 15,16 Experimental efforts dedicated to the bulk synthesis of Sn-alloyed SrTiO 3 have established that incorporation of Sn 4+ at the Ti-sites can readily be achieved using extreme oxidation conditions, while stabilization of Sn 2+ at the Sr-sites remains highly challenging. 15,[17][18][19] On the other hand, thin-film synthesis approaches offer additional degrees of freedom to tailor the solubility of Sn with epitaxial strain, as well as control over its growth kinetics.…”

confidence: 99%

“…15,16 Experimental efforts dedicated to the bulk synthesis of Sn-alloyed SrTiO 3 have established that incorporation of Sn 4+ at the Ti-sites can readily be achieved using extreme oxidation conditions, while stabilization of Sn 2+ at the Sr-sites remains highly challenging. 15,[17][18][19] On the other hand, thin-film synthesis approaches offer additional degrees of freedom to tailor the solubility of Sn with epitaxial strain, as well as control over its growth kinetics. Therefore, by providing access to structural states that will be metastable in bulk, such techniques are excellent tools for exploring a number of theoretical predictions made for Sn-based oxides, e.g., stabilization of Sn 2+ on the A-site of the ATiO 3 lattice with a judicious choice of the in-plane strain conditions.…”

confidence: 99%

See 2 more Smart Citations

Chemistry, growth kinetics, and epitaxial stabilization of Sn2+ in Sn-doped SrTiO3 using (CH3)6Sn2 tin precursor

et al. 2016

View full text Add to dashboard Cite

PbTiO3-based ferroelectrics have impressive electroactive properties, originating from the Pb2+ 6s2 electron lone-pair, which cause large elastic distortion and electric polarization due to cooperative pseudo Jahn-Teller effect. Recently, tin-based perovskite oxide (SnTiO3) containing Sn2+ and a chemistry similar to that of the 6s2 lone-pair has been identified as a thermally stable, environmentally friendly substitute for PbTiO3-based ferroelectrics. However experimental attempts to stabilize Sn2+ on the A-site of perovskite ATiO3 have so far failed. In this work, we report on the growth of atomically smooth, epitaxial, and coherent Sn-alloyed SrTiO3 films on SrTiO3 (001) substrates using a hybrid molecular beam epitaxy approach. With increasing Sn concentration, the out-of-plane lattice parameter first increases in accordance with the Vegard’s law and then decreases for Sn(Sr+Ti+Sn) at. % ratio > 0.1 due to the incorporation of Sn2+ at the A-site. Using a combination of high-resolution X-ray photoelectron spectroscopy and density functional calculations, we show that while majority of Sn is on the B-site, there is a quantitatively unknown fraction of Sn being consistent with the A-site occupancy making SrTiO3 polar. A relaxor-like ferroelectric local distortion with monoclinic symmetry, induced by A-site Sn2+, was observed in Sn-doped SrTiO3 with Sn(Sr+Ti+Sn) at. % ratio = 0.1 using optical second harmonic generation measurements. The role of growth kinetics on the stability of Sn2+ in SrTiO3 is discussed.

show abstract

confidence: 99%

See 1 more Smart Citation

Chemistry, growth kinetics, and epitaxial stabilization of Sn2+ in Sn-doped SrTiO3 using (CH3)6Sn2 tin precursor

et al. 2016

View full text Add to dashboard Cite

show abstract

“…7 However, substitution of Sn 2+ into the Sr 2+ site of SrTiO 3 induces a relaxor-like ferroelectric transition. 8,9 Raman spectroscopic observations of polar transverse optic modes at room temperature suggest the ferroelectric behavior arises due to the formation of percolative polar nanoregions formed in the material.…”

Section: +mentioning

confidence: 99%

Average and local structure of the Pb-free ferroelectric perovskites(Sr,Sn)TiO3and(Ba,Ca,Sn)
Laurita
¹
,
Page
²
,
Suzuki
³

et al. 2015
Phys. Rev. B
Self Cite
30
3
22
0
View full text Add to dashboard Cite

Average and local structure of the Pb-free ferroelectric perovskites (Sr,Sn)TiO3 and (Ba,Ca,Sn)TiO3 The characteristic structural off-centering of Pb 2+ in oxides, associated with its 6s 2 lone pair, allows it to play a dominant role in polar materials, and makes it a somewhat ubiquitous component of ferroelectrics. In this work, we examine the compounds Sr0.9Sn0.1TiO3 and Ba0.79Ca0.16Sn0.05TiO3 using neutron total scattering techniques with data acquired at different temperatures. In these compounds, previously reported as ferroelectrics, Sn 2+ appears to display some of the characteristics of Pb 2+ . We compare the local and long-range structures of the Sn 2+ -substituted compositions to the unsubstituted parent compounds SrTiO3 and BaTiO3. We find that even at these small substitution levels, the Sn 2+ lone pairs drive the local ordering behavior, with the local structure of both compounds more similar to the structure of PbTiO3 rather than the parent compounds.

show abstract

“…For example, doping (Ba,Ca)TiO 3 FE ceramics and the incipient FE SrTiO 3 with tin resulted in the enhancement [28][29][30][31] Modern epitaxial engineering techniques can stabilize metastable structures through artificial elastic boundary conditions (misfit strain) and/or rate-limited kinetics. 38 Therefore, they offer an alternative approach to avoid the restrictions imposed by bulk thermodynamics in order to grow novel materials with enhanced properties that have the potential to replace PZT in a variety of technological applications.…”

Section: Introductionmentioning

confidence: 99%

First-principles studies of lone-pair-induced distortions in epitaxial phases of perovskiteSnTiO3andPbTiO3

et al. 2015

View full text Add to dashboard Cite

In this project, a computational investigation utilizing density functional theory methods is carried out to elucidate the differences in stereochemical lone-pair activity of Pb 2+ and Sn 2+ A-site ions in epitaxial polar ATiO3 perovskites. The contrasting tendencies for the lead-and tin-based compounds to form different phases -Amm2 for the former vs Cm for the latter -under biaxial tension are connected to the amount of charge concentrated within the lone pair lobes. Specifically, phases are energetically more preferable when as much charge as possible is dissipated out of the lobe, thus lowering the cost of Coulomb repulsions between the lone pair and the surrounding oxygen cage. Although a strong band gap tuning was predicted in (fictitious) SnTiO3 during the tensile P 4mm → Cm phase transformation [see Phys. Rev. B 84, 245126 (2011)], we find the same effect to be considerably weaker in PbTiO3. The insights gained about the electronic-level underpinnings of transitional behavior in such lone-pair active epitaxial ferroelectrics may be used in the design of a new generation of more efficient electromechanical and electrooptical devices.

show abstract

Ferroelectricity of Sn-doped SrTiO3perovskites with tin at bothAandBsites

Cited by 35 publications

References 25 publications

Chemistry, growth kinetics, and epitaxial stabilization of Sn2+ in Sn-doped SrTiO3 using (CH3)6Sn2 tin precursor

Chemistry, growth kinetics, and epitaxial stabilization of Sn2+ in Sn-doped SrTiO3 using (CH3)6Sn2 tin precursor

Average and local structure of the Pb-free ferroelectric perovskites(Sr,Sn)TiO3and(Ba,Ca,Sn)
Laurita
¹
,
Page
²
,
Suzuki
³

et al. 2015
Phys. Rev. B
Self Cite
30
3
22
0
View full text Add to dashboard Cite

First-principles studies of lone-pair-induced distortions in epitaxial phases of perovskiteSnTiO3andPbTiO3

Contact Info

Product

Resources

About

Ferroelectricity of Sn-doped SrTiO3perovskites with tin at bothAandBsites

Cited by 35 publications

References 25 publications

Chemistry, growth kinetics, and epitaxial stabilization of Sn2+ in Sn-doped SrTiO3 using (CH3)6Sn2 tin precursor

Chemistry, growth kinetics, and epitaxial stabilization of Sn2+ in Sn-doped SrTiO3 using (CH3)6Sn2 tin precursor

Average and local structure of the Pb-free ferroelectric perovskites(Sr,Sn)TiO3and(Ba,Ca,Sn)Laurita1, Page2, Suzuki3 et al. 2015Phys. Rev. BSelf Cite303220View full textAdd to dashboardCite

First-principles studies of lone-pair-induced distortions in epitaxial phases of perovskiteSnTiO3andPbTiO3

Contact Info

Product

Resources

About

Average and local structure of the Pb-free ferroelectric perovskites(Sr,Sn)TiO3and(Ba,Ca,Sn)
Laurita
¹
,
Page
²
,
Suzuki
³

et al. 2015
Phys. Rev. B
Self Cite
30
3
22
0
View full text Add to dashboard Cite