%0 Journal Article %1 WOS:000177823300022 %A Teixeira, AMR %A Pilla, O %A Rossi, F %A Freire, PTC %A Melo, FEA %A Mendes, J %A Lemos, V %C THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND %D 2002 %I PERGAMON-ELSEVIER SCIENCE LTD %J JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS %K compounds; elastic phase properties; transitions} {inorganic %N 10 %P 1951-1956 %R 10.1016/S0022-3697(02)00191-9 %T Brillouin scattering study of phase transitions in LiK0.80(NH4)(0.20)SO4 mixed crystals %V 63 %X Brillouin spectroscopy was used to study the phase transitions of LiK0.80(NH4)(0.20)SO4 mixed crystals in the temperature range 10-300 K. The relevant elastic stiffness coefficients were evaluated at room temperature. The quasi-longitudinal gamma(16) and the quasi-transverse gamma(17) mode frequencies were measured in the above temperature range. From their frequency vs. temperature curve, three different phase transitions were determined. Two of the four phases presented by the crystal were found to be ferroelastic. The observed phases are tentatively assigned through a comparison with the phase transitions undergone by LiKSO4 and LiK0.96(NH4)(0.04)SO4 crystals. An anomalous behavior of the Brillouin linewidth near the 260 K phase transition was observed. (C) 2002 Elsevier Science Ltd. All rights reserved.

@article{WOS:000177823300022, abstract = {Brillouin spectroscopy was used to study the phase transitions of LiK0.80(NH4)(0.20)SO4 mixed crystals in the temperature range 10-300 K. The relevant elastic stiffness coefficients were evaluated at room temperature. The quasi-longitudinal gamma(16) and the quasi-transverse gamma(17) mode frequencies were measured in the above temperature range. From their frequency vs. temperature curve, three different phase transitions were determined. Two of the four phases presented by the crystal were found to be ferroelastic. The observed phases are tentatively assigned through a comparison with the phase transitions undergone by LiKSO4 and LiK0.96(NH4)(0.04)SO4 crystals. An anomalous behavior of the Brillouin linewidth near the 260 K phase transition was observed. (C) 2002 Elsevier Science Ltd. All rights reserved.}, added-at = {2022-05-23T20:00:14.000+0200}, address = {THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND}, author = {Teixeira, AMR and Pilla, O and Rossi, F and Freire, PTC and Melo, FEA and Mendes, J and Lemos, V}, biburl = {https://www.bibsonomy.org/bibtex/25705a13f238ac7776f36e173c9a336e3/ppgfis_ufc_br}, doi = {10.1016/S0022-3697(02)00191-9}, interhash = {aeb231c21eb25c36dc99882463790bce}, intrahash = {5705a13f238ac7776f36e173c9a336e3}, issn = {0022-3697}, journal = {JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS}, keywords = {compounds; elastic phase properties; transitions} {inorganic}, number = 10, pages = {1951-1956}, publisher = {PERGAMON-ELSEVIER SCIENCE LTD}, pubstate = {published}, timestamp = {2022-05-23T20:00:14.000+0200}, title = {Brillouin scattering study of phase transitions in LiK0.80(NH4)(0.20)SO4 mixed crystals}, tppubtype = {article}, volume = 63, year = 2002 }