Study on Growth and Property of Heavy Rare Earth Dy~(3+) Doped TGS Crystals

By choosing heavy rare earth Dy3+ as doping cation,and through DL-alamine and L-glulamatic acid partially substituting for glycine moleculars,several doped TGS crystals were successfully grown.The growth experiments and the measured results indicat that the growth of doped TGS crystals are easier than pure TGS.When the pH value of the growth solution for doped crystals is kept between 1 and 4,the growth habit of doped crystals is changed.The amount of rare earth elements in doped crystals is tested using ICP emission spectrum method.The lattice parameters are measured using X-ray powder diffraction method.The results show that the elements have entered into the crystals.But the symmertry remains C2-2.Through the measurement of ferroelectric hysteresis loops of the doped crystals,the inner bias field is received.The temperature dependence curve of pyroelectric coefficient,spontaneous polarization are measured.The influence of various dopants on the pyroelectric property and polarization restraint is analyzed,the results show that this series of TGS are excellent pyroelectric materials.