Ferroelectric lithium niobate. 3. Single crystal X-ray diffraction study at 24°C

Different crystal chemistries of the117Cd→117Ohkubo1, Murakami2, Saito3 et al. 1999Phys. Rev. B84110View full textAdd to dashboardCite

“…A simple point-charge model calculation with the diffraction-derived structural data [22][23][24][25] suggests that the temperature dependence of the lattice constants is very much related to the increasing nature of the temperature dependence of Q . However, for the clear understanding of the generally increasing temperature dependence of Q and also of the characteristic temperature dependence of Q of 111 Cd, accurate theoretical calculations are needed.…”

“…If each oxygen surrounding Cd is pushed away maintaining the axial symmetry around Cd, the value of V zz at In and 111 Cd in LiNbO 3 and LiTaO 3 , i.e., the increasing nature of the temperature dependence of Q . We estimate the temperature dependences of V zz at the Li sites in LiNbO 3 and LiTaO 3 by means of their diffractionderived structural data [22][23][24][25] and a point-charge model, which takes into account the charges on only the first nearestneighbor ions surrounding the probe nucleus. 28 This model was quite successful in reproducing the variation of V zz at the Nb site in the LiNbO 3 -LiTaO 3 solid-solution system with composition and the temperature dependence of V zz at the…”

Synchrotron X-ray Studies of LiNbO3 and LiTaO3

“…Two O layers are interposed between the Li...B-atom pairs delineating the first and third zones (Abrahams, Reddy & Bernstein, 1966;Abrahams & Bernstein, 1967).…”

“…Its room-temperature structure, studied by single-crystal X-ray diffraction (Abrahams, Reddy & Bernstein, 1966) and neutron diffraction (Abrahams, Hamilton & Reddy, 1966), is closely related to those of corundum and t Deceased 3rdFebruary 1997.…”

Spin-Hamiltonian Parameters For CrLi 3+ Doped In LiNbO3

“…For LiNbO 3 :Cr Li 3+ we have [12] two different distances between Li ion and two triangles of oxygen ions: upper and lower triangles [11]. The distance between Li and upper oxygen triangle ions R H1 is 2.238 Å and the same distance for the lower oxygen triangle R H2 is 2.068 Å [24]. Also, r (Cr 3+ ) = 0.63Å [25] and r (Li 1+ ) = 0.68Å [25], so that we have R 1 =2.188 Å, R 2 = 2.018 Å.…”