%0 Journal Article %1 WOS:000239794200029 %A Silva, E N %A Ayala, A P %A Moreira, R L %A Gesland, J Y %C 2-4 PARK SQUARE, MILTON PARK, ABINGDON OR14 4RN, OXON, ENGLAND %D 2006 %I TAYLOR & FRANCIS LTD %J FERROELECTRICS %K Impedance Raman; and ferroelectricity; infrared spectroscopies} {SrAlF5; %P 233-240 %R 10.1080/00150190600695909 %T About the ferroelectricity of SrAlF5 %V 334 %X SrAIF5 has been reported as one of the rare fluoride ferroelectric crystals, belonging to the polar 14 group. However, recent x-ray diffraction data suggest that the correct structure is centrosymmetric (14(1)/a). Since ferroelectricity is forbidden in this structure, the existence of an inversion centre and the high temperature phase transition were investigated by vibrational and impedance spectroscopies. Thus, the optical phonons of SrAlF5 single crystals were obtained by polarized Raman scattering and infrared reflectance spectroscopy. On the other hand, the high temperature phase transition was determined by frequency and temperature dependent measurements of the complex dielectric constant.

@article{WOS:000239794200029, abstract = {SrAIF5 has been reported as one of the rare fluoride ferroelectric crystals, belonging to the polar 14 group. However, recent x-ray diffraction data suggest that the correct structure is centrosymmetric (14(1)/a). Since ferroelectricity is forbidden in this structure, the existence of an inversion centre and the high temperature phase transition were investigated by vibrational and impedance spectroscopies. Thus, the optical phonons of SrAlF5 single crystals were obtained by polarized Raman scattering and infrared reflectance spectroscopy. On the other hand, the high temperature phase transition was determined by frequency and temperature dependent measurements of the complex dielectric constant.}, added-at = {2022-05-23T20:00:14.000+0200}, address = {2-4 PARK SQUARE, MILTON PARK, ABINGDON OR14 4RN, OXON, ENGLAND}, author = {Silva, E N and Ayala, A P and Moreira, R L and Gesland, J Y}, biburl = {https://www.bibsonomy.org/bibtex/24dd1729fb2e337688fb13c6424cdc195/ppgfis_ufc_br}, doi = {10.1080/00150190600695909}, interhash = {629f58e4a10073873bfdebbff6b1b8c9}, intrahash = {4dd1729fb2e337688fb13c6424cdc195}, issn = {0015-0193}, journal = {FERROELECTRICS}, keywords = {Impedance Raman; and ferroelectricity; infrared spectroscopies} {SrAlF5;}, note = {11th International Meeting on Ferroelectricity (IMF-11), Iguassu Falls, BRAZIL, SEP 05-09, 2005}, organization = {Conselho Nacl Desenvolviment Cientif Tecnol; Consejo Nacl Invest Cientif Tecn; Univ Nacl La Plata; Univ Fed Sao Carlos; Ctr Latinoamer Fis; Taylor & Francis; Brazil-MRS; FAPESP; CAPES; Faber-Castell; Banco Brasil}, pages = {233-240}, publisher = {TAYLOR & FRANCIS LTD}, pubstate = {published}, timestamp = {2022-05-23T20:00:14.000+0200}, title = {About the ferroelectricity of SrAlF5}, tppubtype = {article}, volume = 334, year = 2006 }