%0 Journal Article %1 WOS:000088137100007 %A Melo, FEA %A Saip, JAB %A Guedes, I %A Freire, PTC %A Mendes, J %A Chaves, AS %C 2-4 PARK SQUARE, MILTON PARK, ABINGDON OR14 4RN, OXON, ENGLAND %D 1999 %I TAYLOR & FRANCIS LTD %J FERROELECTRICS %K ferroclasticity; phase pressure} transition; uniaxial {CLS; %N 1-2 %P 57-65 %R 10.1080/00150199908016996 %T Inhibition of the phase transition in CsLiSO4 induced by uniaxial pressure %V 233 %X This work presents for the first time a measurement on inhibition of the ferroelastic phase transition in CsLiSO4 crystals at temperature 202 K. The result is obtained by application of uniaxial pressure up to 1 kbar, which is directed along the 010 axis relative to the orthorhombic structure. Stabilization of the monoclinic phase is found due to the fact that the soft TA phonon becomes uncoupled to the hard TO phonon and does not approach to zero at 202 K. Therefore, the behavior of the dielectric constant epsilon(2) exhibits a normal dependence on the temperature. We have performed a simple theoretical analysis to calculate the TA and TO phonon energies. From these results the uniaxial pressure - temperature phase diagram of CsLiSO4 is determined.

@article{WOS:000088137100007, abstract = {This work presents for the first time a measurement on inhibition of the ferroelastic phase transition in CsLiSO4 crystals at temperature 202 K. The result is obtained by application of uniaxial pressure up to 1 kbar, which is directed along the [010] axis relative to the orthorhombic structure. Stabilization of the monoclinic phase is found due to the fact that the soft TA phonon becomes uncoupled to the hard TO phonon and does not approach to zero at 202 K. Therefore, the behavior of the dielectric constant epsilon(2) exhibits a normal dependence on the temperature. We have performed a simple theoretical analysis to calculate the TA and TO phonon energies. From these results the uniaxial pressure - temperature phase diagram of CsLiSO4 is determined.}, added-at = {2022-05-23T20:00:14.000+0200}, address = {2-4 PARK SQUARE, MILTON PARK, ABINGDON OR14 4RN, OXON, ENGLAND}, author = {Melo, FEA and Saip, JAB and Guedes, I and Freire, PTC and Mendes, J and Chaves, AS}, biburl = {https://www.bibsonomy.org/bibtex/2c4fa78a3a16351e6edea98babfc7a43f/ppgfis_ufc_br}, doi = {10.1080/00150199908016996}, interhash = {16cff07394693ffcdd5b53a35c71c48b}, intrahash = {c4fa78a3a16351e6edea98babfc7a43f}, issn = {0015-0193}, journal = {FERROELECTRICS}, keywords = {ferroclasticity; phase pressure} transition; uniaxial {CLS;}, note = {2nd International Seminar on Physics of Ferroelastics, KAZAN, RUSSIA, JUN 25-27, 1997}, number = {1-2}, organization = {Kazan State Univ; Kazan Phys Tech Inst; Moscow Power Energet Inst, Kazan Branch; Russian Fdn Basic Res; State Comm High Educ; Gordon & Breach Publishing Grp; Kazan Phys Soc}, pages = {57-65}, publisher = {TAYLOR & FRANCIS LTD}, pubstate = {published}, timestamp = {2022-05-23T20:00:14.000+0200}, title = {Inhibition of the phase transition in CsLiSO4 induced by uniaxial pressure}, tppubtype = {article}, volume = 233, year = 1999 }