Bibcode
Varela, A. T.; Sasaki, J. M.; Guedes, I.; Freire, P. T. C.; Ayala, A. P.; Mendes Filho, J.; Melo, F. E. A.; Chaves, A. S.
Bibliographical reference
eprint arXiv:cond-mat/0001364
Advertised on:
1
2000
Citations
1
Refereed citations
1
Description
X-ray scattering measurements are performed in order to verify % that
the mechanism leading to the DC electric field induced $C_{2v}^{19} o
C_{2v}^{
eq 19}$ phase transition in KDP crystal at 119 K is the
changing of the local sites symmetries of phosphate group from $C_2$ in
the $C_{2v}^{19}$ phase to $C_s$ in the $C_{2v}^{
eq 19}$ phase. It is
shown by analyzing the integrated intensity of the (800) and (080)
reflections that under DC electric field the density of oxygen atoms
lying on these plane changes indicating that phosphate group rotates
around the [010] direction relative to the orthorhombic $C_{2v}^{19}$
structure. Some Raman results are also discussed.