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Interband transitions in epitaxial ferroelectric films of NaNbO3./sub
The interband optical transitions in cube-on-cube-type epitaxial ferroelectric NaNbO3 thin films and a reference antiferroelectric NaNbO3 crystal are studied in the spectral range of 0.74?9 eV using variable-angle spectroscopic ellipsometry ...
Condensed matter physics (including formerly solid state physics, supercond.)
- 2015 •
- Jimp •
- Link
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Jimp - Článek v periodiku v databázi Web of Science
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Polar phonon mixing in magnetoelectric EuTiO3.
vibration of Ti cations against the oxygen octahedra. TO2 phonon expresses vibrations of Eu cation against the TiO6 octahedra and the highest frequency phonon represents O-octahedra bending. Incipient ferroele...
BM - Fyzika pevných látek a magnetismus
- 2009 •
- Jx
Rok uplatnění
Jx - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)
Multiple soft-mode vibrations of lead zirconate
that these modesprimarily involve vibrations of Pb ions and librations of oxygen octahedra into the phase transition mechanism, involving a soft ferroelectric branch coupled by a trilinear term to another two oxygen
BM - Fyzika pevných látek a magnetismus
- 2014 •
- Jx •
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Jx - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)
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Phase competition and effect of chemical ordering in ferroelectric relaxor PbSc0,5Nb0,5O3 from first principles
-like superstructure) has a ferroelectric ground state with R3 spacegroup. It is characterized by a tilt system aaa as well as different sizes of adjacent oxygen octahedraWe present results of first principles calculations ...
BM - Fyzika pevných látek a magnetismus
- 2016 •
- Jx •
- Link
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Jx - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)
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Polarized Raman scattering study of PSN single crystals and epitaxial thin films
. In particular, the scattering characteristics of the oxygen octahedra breathing mode near 810 cm-1 indicate a ferroelectric state for the crystals and a relaxor state......
BM - Fyzika pevných látek a magnetismus
- 2015 •
- Jx •
- Link
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Jx - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)
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Lattice modes in paraelectric La1/2Na1/2TiO3 by infrared and Raman spectroscopy
allowed us to discuss the reasons for the suppressed ferroelectricity of the material. Temperature evolution of the Raman scattering intensity of an oxygen octahedra bending......
BM - Fyzika pevných látek a magnetismus
- 2013 •
- Jx •
- Link
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Jx - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)
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Local structure of relaxor ferroelectric SrxBa1-xNb2O6 from a pair distribution function analysis
strains to the structure and influences the Nb-O6 octahedra tilting. The resulting ferroelectric relaxor behavior appears. We find evidence for two Nb-O6 subsystems with different variations of niobium-oxygen bond lengths,...
Condensed matter physics (including formerly solid state physics, supercond.)
- 2019 •
- Jimp •
- Link
Rok uplatnění
Jimp - Článek v periodiku v databázi Web of Science
Výsledek na webu
Polar lattice vibrations and phase transition dynamics in Pb(Zr1-xTix)O3.
of the oxygen octahedra. The last bare mode is not IR active, but it becomes activated? in the cubic and high-temperature ferroelectric phase, and three main vibrationsin the low-temperature ferroelectric phase wi...
BM - Fyzika pevných látek a magnetismus
- 2011 •
- Jx •
- Link
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Jx - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)
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Magnetic and dielectric properties of multiferroic Eu0.5Ba0.25Sr0.25TiO3 ceramics
revealed near 130?K and observed ferroelectric hysteresis loops prove the ferroelectric evidence of a lower crystal structure, presumably tetragonal I4/mcm with tilted oxygen octahedra as it has been observed in E...
BM - Fyzika pevných látek a magnetismus
- 2013 •
- Jx •
- Link
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Jx - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)
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Properties of BaTiO3 confined in opal matrices-lattice packings of nanospheres silica oxides
of the ferroelectrically distorted TiO6 octahedra without any long-range order. Raman spectra bring evidence of a diffuse ferroelectric phase transition in the opal-BaTiO3 composite....
BM - Fyzika pevných látek a magnetismus
- 2010 •
- D
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D - Stať ve sborníku
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