0000000000016778

AUTHOR

Alexej Pashkin

showing 4 related works from this author

Corrigendum to “Far-infrared and THz spectroscopy of 0.4PMN–0.3PSN–0.3PZN relaxor ferroelectric ceramics” [J. Eur. Ceram. Soc. 27 (2007) 3713–3717]

2007

Materials scienceNuclear magnetic resonanceFar infraredbusiness.industryvisual_artMaterials ChemistryCeramics and Compositesvisual_art.visual_art_mediumOptoelectronicsCeramicbusinessThz spectroscopyRelaxor ferroelectricJournal of the European Ceramic Society
researchProduct

Far-infrared and THz spectroscopy of 0.4PMN–0.3PSN–0.3PZN relaxor ferroelectric ceramics

2007

Abstract Temperature dependence of the optic phonons in 0.4PbMg 1/3 Nb 2/3 O 3 –0.3PbSc 1/2 Nb 1/2 O 3 –0.3PbZn 1/3 Nb 2/3 O 3 (0.4PMN–0.3PSN–0.3PZN) ceramics were studied by means of FTIR reflection and THz transmission spectroscopy in the temperature range of −253.15 to 226.85 °C. On heating from low temperatures, the A 1 component of the strongly split TO 1 mode softens towards the Burns temperature, but the softening ceases near 126.85 °C which could be a signature of polar cluster percolation temperature. Surprisingly, the TO 2 mode also softens on heating and follows the Cochran law with extrapolated critical temperature close to the melting point.

Materials scienceCondensed matter physicsPhononMineralogyAtmospheric temperature rangeFar infraredvisual_artPercolationMaterials ChemistryCeramics and CompositesMelting pointvisual_art.visual_art_mediumCeramicSpectroscopyBurns temperatureJournal of the European Ceramic Society
researchProduct

Infrared and broadband dielectric spectroscopy of PZN-PMN-PSN relaxor ferroelectrics: Origin of two-component relaxation

2006

Dielectric spectra of several solid solutions of $\mathrm{Pb}{\mathrm{Mg}}_{1∕3}{\mathrm{Nb}}_{2∕3}{\mathrm{O}}_{3}\text{\ensuremath{-}}\mathrm{Pb}{\mathrm{Sc}}_{1∕2}{\mathrm{Nb}}_{1∕2}{\mathrm{O}}_{3}\text{\ensuremath{-}}\mathrm{Pb}{\mathrm{Zn}}_{1∕3}{\mathrm{Nb}}_{2∕3}{\mathrm{O}}_{3}$ (PMN-PSN-PZN) relaxor ferroelectrics were investigated in a broad frequency range from $20\phantom{\rule{0.3em}{0ex}}\mathrm{Hz}$ up to $100\phantom{\rule{0.3em}{0ex}}\mathrm{THz}$ by a combination of dielectric spectroscopy $(20\phantom{\rule{0.3em}{0ex}}\mathrm{Hz}\char21{}53\phantom{\rule{0.3em}{0ex}}\mathrm{GHz})$, time-domain terahertz spectroscopy $(0.1\char21{}0.9\phantom{\rule{0.3em}{0ex}}\mathrm{TH…

PhysicsDielectric spectrumCondensed matter physicsPhononInfraredInfrared spectroscopyDielectricCondensed Matter PhysicsElectronic Optical and Magnetic MaterialsBroadband dielectric spectroscopyBurns temperatureSolid solutionPhysical Review B
researchProduct

Polar phonons in relaxor ferroelectric 0.2PSN-0.4PMN-0.4PZN

2008

Relaxor ferroelectrics 0-2PbSc(1/2)Nb(1/2)O(3) - 0.4PbMg(1/3)Nb(2/3)O(3)-0.4PbZn(1/3)Nb(2/3)O(3) ceramics were studied by means of the Fourier transform infrared reflection and THz transmission spectroscopy in the temperature range of 20-500 K. On heating from low temperatures, the A(1) component of the strongly split TO1 mode softens towards the Burns temperature, but the softening ceases near 400 K, which could be a signature of polar cluster percolation temperature.

Materials scienceCondensed matter physicsPhononInfraredGeneral Physics and AstronomyAtmospheric temperature rangesymbols.namesakeFourier transformReflection (mathematics)visual_artPercolationsymbolsvisual_art.visual_art_mediumCeramicBurns temperature
researchProduct