6533b838fe1ef96bd12a4549

RESEARCH PRODUCT

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

J. BanysS. KambaKarlis BormanisAndris SternbergAlexej PashkinJan Macutkevic

subject

Materials scienceCondensed matter physicsPhononMineralogyAtmospheric temperature rangeFar infraredvisual_artPercolationMaterials ChemistryCeramics and CompositesMelting pointvisual_art.visual_art_mediumCeramicSpectroscopyBurns temperature

description

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.

yearjournalcountryeditionlanguage
2007-01-01Journal of the European Ceramic Society
https://doi.org/10.1016/j.jeurceramsoc.2007.02.023