Synthesis and high (pressure, temperature) stability of ZnTiO3 polymorphs studied by Raman spectroscopy

Bernert, Thomas; Ruiz‐Fuertes, J.; Bayarjargal, Lkhamsuren; Winkler, Björn

doi:10.1016/j.solidstatesciences.2015.03.014

Cited by 19 publications

(5 citation statements)

References 35 publications

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“…The Raman spectra of wangdaodeite are similar to those of synthesized LiNbO 3 -type MnTiO 3 (Ko et al 1989;Wu et al 2011). Barnert et al (2015) reported that ZnTiO 3 also behaves similarly as FeTiO 3 and MnTiO 3 at high pressure and high temperature, and the Raman spectrum of synthetic LiNbO 3 -type ZnTiO 3 is also similar to that of wangdaodeite. Since the Raman spectrum of LiNbO 3 -type polymorph of MnTiO 3 is more similar to that of LiNbO 3 -type polymorph of FeTiO 3 (Linton et al 1999), we assume that all these three grains are mainly composed of wangdaodeite mixed with a little remain of ilmenite.…”

Section: Raman Spectroscopysupporting

confidence: 59%

“…Barnert et al. () reported that ZnTiO 3 also behaves similarly as FeTiO 3 and MnTiO 3 at high pressure and high temperature, and the Raman spectrum of synthetic LiNbO 3 ‐type ZnTiO 3 is also similar to that of wangdaodeite. Since the Raman spectrum of LiNbO 3 ‐type polymorph of MnTiO 3 is more similar to that of LiNbO 3 ‐type polymorph of FeTiO 3 (Linton et al.…”

Section: Raman Spectroscopymentioning

confidence: 96%

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Wangdaodeite, the LiNbO₃‐structured high‐pressure polymorph of ilmenite, a new mineral from the Suizhou L6 chondrite

Xie

Yang

et al. 2019

Meteorit & Planetary Scien

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Wangdaodeite, the shock-induced lithium niobate-structured polymorph of ilmenite, was found in the Suizhou L6 chondrite. It occurs as small irregular particles (2-20 lm in size) inside or adjacent to the shock melt veins. Wangdaodeite coexists in veins with ringwoodite, majorite, and xieite. The chemical formula of wangdaodeite is FeTiO 3. The empirical formula is: (Fe 0.85 Mg 0.10 Mn 0.05) Σ1.00 Ti 0.99 O 3 , which is similar to that of its host ilmenite. The Raman spectra of wangdaodeite display the bands at 174-179, 273-277, 560-567, 738-743 cm À1 , which are different to those for ilmenite. TEM images show that ilmenite is composed of polysynthetic-twinned crystals while wangdaodeite is composed of random-oriented nanometric domains sized 20-50 nm. Electron diffraction established wangdaodeite to be trigonal with the lithium niobate structure. Cell parameters are: a = 5.13(1) A, c = 13.78(1) A; c/a = 2.69; space group R3c; calculated density = 4.72 g cm À3. The P-T conditions for formation of wangdaodeite were estimated to be 20-24 GPa and >1200°C.

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Section: Raman Spectroscopysupporting

confidence: 59%

Section: Raman Spectroscopymentioning

confidence: 96%

Wangdaodeite, the LiNbO₃‐structured high‐pressure polymorph of ilmenite, a new mineral from the Suizhou L6 chondrite

Xie

Yang

et al. 2019

Meteorit & Planetary Scien

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“…LN-type ZnTiO 3 was synthesized in powder form using pure Il-type ZnTiO 3 [23] sealed inside a platinum capsule at 16.5 GPa and 1150…”

Section: Methodsmentioning

confidence: 99%

Ferroelectric soft mode of polarZnTiO3investigated by Raman spectroscopy at high pressure

et al. 2015

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We explore the vibrational behavior and stability of ferroelectric ZnTiO 3 under high pressure by Raman spectroscopy and second-harmonic-generation (SHG) measurements. Ab initio lattice-dynamics calculations have been employed to solve a controversy concerning the phonon-dispersion relations of ZnTiO 3 and to carry out an assignment of the Raman modes. A ferroelectric to paraelectric phase transition has been observed both by Raman spectroscopy and SHG at 20.8 GPa. Contrary to LiNbO 3 , the ferroelectric soft mode of ZnTiO 3 has been found to be the A 1 (2) and not the A 1 (1) mode. The calculated eigenvectors show that the A 1 (2) mode of ferroelectric ZnTiO 3 is an antiphase vibration of the Ti atom against the oxygen framework, similar to the soft modes observed in ferroelectric perovskites. The SHG signal of ZnTiO 3 has been found to be independent of the grain size below the phase transition, indicating that ZnTiO 3 is a phase-matchable compound.

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“…According to group theory ZnTiO3 has ten Raman active modes 5 Ag + 5 Eg. The bands at 102 cm -1 , 153 cm -1 , 433 cm -1 , 583 cm -1 are the Eg modes and 310 cm -1 , 489 cm -1 , 795 cm -1 are related to Ag modes of the ZTO Raman spectra [24][25].…”

Section: Raman Spectramentioning

confidence: 99%

Effect of oxygen mixing percentage on structural, optical and electrical properties of ZnTiO3 thin films grown by RF magnetron sputtering

Varaprasad

Sridevi

Anuradha

et al. 2021

J Mater Sci: Mater Electron

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Perovskites are important composites in the area of multidisciplinary applications. It is achieved by carefully choosing and tuning the properties of the thin-film at the deposition. In this paper, ZnTiO3 (ZTO) thinfilms were being deposited on quartz and N-Si substrates by RF magnetron sputtering. The thin-films were developed at room temperature, oxygen percentage levels varying from 0 to 100, and annealed at 600 o C. The electrical, optical, morphological, and structural properties were analyzed as a function of oxygen mixing percentage (OMP). The crystallinity of the cubic structured ZTO thin-film is found to be high at 25 OMP, and it is gradually decreased with increased OMP. The surface morphology of the thin-film is observed, and roughness is measured from the atomic force microscope. Raman Spectroscopy investigated the phase formation and the vibrational modes of the thin-film with their spectral de-convolution. The ZTO thin-films optical properties were investigated using transmittance spectra. The ZTO thin-film indicated the highest refractive index of 2.46, at 633nm with optical bandgap values of 3.57 eV, with a thickness of 145nm and 25 OMP. The refractive index, thin-film thickness, and excitation coefficient were analyzed using the Swanepoel envelope technique. Electrical characteristics of ZTO thin-film are measured from the optimized conditions of the thin-film with conventional thermionic emission (TE) technique.

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Synthesis and high (pressure, temperature) stability of ZnTiO3 polymorphs studied by Raman spectroscopy

Cited by 19 publications

References 35 publications

Wangdaodeite, the LiNbO₃‐structured high‐pressure polymorph of ilmenite, a new mineral from the Suizhou L6 chondrite

Wangdaodeite, the LiNbO₃‐structured high‐pressure polymorph of ilmenite, a new mineral from the Suizhou L6 chondrite

Ferroelectric soft mode of polarZnTiO3investigated by Raman spectroscopy at high pressure

Effect of oxygen mixing percentage on structural, optical and electrical properties of ZnTiO3 thin films grown by RF magnetron sputtering

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Synthesis and high (pressure, temperature) stability of ZnTiO3 polymorphs studied by Raman spectroscopy

Cited by 19 publications

References 35 publications

Wangdaodeite, the LiNbO3‐structured high‐pressure polymorph of ilmenite, a new mineral from the Suizhou L6 chondrite

Wangdaodeite, the LiNbO3‐structured high‐pressure polymorph of ilmenite, a new mineral from the Suizhou L6 chondrite

Ferroelectric soft mode of polarZnTiO3investigated by Raman spectroscopy at high pressure

Effect of oxygen mixing percentage on structural, optical and electrical properties of ZnTiO3 thin films grown by RF magnetron sputtering

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Wangdaodeite, the LiNbO₃‐structured high‐pressure polymorph of ilmenite, a new mineral from the Suizhou L6 chondrite

Wangdaodeite, the LiNbO₃‐structured high‐pressure polymorph of ilmenite, a new mineral from the Suizhou L6 chondrite