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Effect of Impressing Rate of Field on Polarization Reversal in Mg Doped Near Stoichiometric Lithium Tantalate Single Crystals

  • Sarveswaran Ganesamoorthy (a1), Masaru Nakamura (a1), Shunji Takekawa (a1), Somu Kumaragurubaran (a1), Kazuya Terabe (a1) and Kenji Kitamura (a1)...

Abstract

The coercive field measured from ferroelectric hysteresis loop for pure and Mg:SLT (0.5 mol% doped) crystals were found to be independent of ramp rate of voltage, while it depends strongly on ramp rate for Mg:SLT (1 mol% doped) crystals. The measured coercive field decreased monotonously depending on the Mg concentration and low Ec value of 6 kV/cm is obtained for Mg(1.0 mol%)SLT crystal. Internal field of about 1 kV/cm present in pure SLT completely gets vanished in Mg(1.0 mol%)SLT. Spontaneous polarization is insensitive to the Mg addition. The origin of the internal field and large changes in switching fields appear largely to be dependent on the [Li]/[Li+Ta] ratio in crystals. On repeated cycling, the coercive field is found to have a marginal variation in pure and Mg doped SLT crystals.

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Effect of Impressing Rate of Field on Polarization Reversal in Mg Doped Near Stoichiometric Lithium Tantalate Single Crystals

  • Sarveswaran Ganesamoorthy (a1), Masaru Nakamura (a1), Shunji Takekawa (a1), Somu Kumaragurubaran (a1), Kazuya Terabe (a1) and Kenji Kitamura (a1)...

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