Raman Scattering Study of Lithium Diborate (Li₂B₄O₇) Single Crystal

Growth and EPR and optical properties of Li2B4O7 single crystals doped with Co2+ ions

“…It may be expected that there exists a nonpolar phase with a higher symmetry at high temperature as has been predicted by Paul and Taylor [10] or Furusawa et al [11]. In case of LBO crystal, the ferroelectric to paraelectric phase transition temperature has been estimated as 590 1C [11]. So far, no experimental evidence for such a phase transition has been found, although Raman scattering measurements have been performed over a wide temperature range of 300-900 K by Furusawa et al [12].…”

“…Unfortunately, direct measurements, such as D-E hysteresis and pyroelectricity, have not yet been performed because of high ionic conductivity of lithium. It may be expected that there exists a nonpolar phase with a higher symmetry at high temperature as has been predicted by Paul and Taylor [10] or Furusawa et al [11]. In case of LBO crystal, the ferroelectric to paraelectric phase transition temperature has been estimated as 590 1C [11].…”

High-order stimulated Raman scattering and cascaded nonlinear lasing effects in crystals of (χ(3)→ χ(2))-active orthorhombic PbB4O7

“…Their energy is significantly lower than that of the corresponding vibrations of lithium and sodium tetraborates (see, e.g. [25]) where the lighter cations Li + and Na + appear. The translation of the significantly lighter B 3+ cations contributes the vibration observed in the range 400-500 cm −1 ; 2) Among the modes observed in the A 1 Raman spectra (in Fig.…”

New Piezoelectric Substrates for Saw Devices

“…aX e S . 108 ' 113 ' 114 ' 119 ' 131 ' 132 ' 137 ' 140 - 144 Growth also has been demonstrated along the [110] direction; 135 ' 139144 such boules simplify the manufacture of desirable 45° rotated X-cut devices.…”