Differential Raman scattering from impurity soft modes in mixed crystals of K1−xNaxTaO3 and K1−xLixTaO3 |
| |
| Authors: | Yizhak Yacoby Shlomó Just |
| |
| Institution: | Francis Bitter National Magnet Laboratory and Physics Department, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, U.S.A.;Racach Institute of Physics, Hebrew University, Jerusalem, Israel |
| |
| Abstract: | Impurity modes are observed in crystals of KTaO3 doped with Na and Li, using differential Raman spectroscopy. One of the modes is shown to soften as the temperature approaches the ferroelectric transition temperature. Analysis of the results shows that the Na and Li ions do not occupy center of inversion positions. The roll of this observation in the inducement of ferroelectricity in these crystals is briefly discussed. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
