The profilc of susceptibility uear the surfuce of a senni-ifinite frrclectric is calculatel from Luidau free energy.In surfunce ferroclectric plase,the susceptibility is reduced at surface for|δ|<<βand much en...The profilc of susceptibility uear the surfuce of a senni-ifinite frrclectric is calculatel from Luidau free energy.In surfunce ferroclectric plase,the susceptibility is reduced at surface for|δ|<<βand much enhanced for|δ|-β,whereδandβare the.extrapolation le1ngth and tle coluerent lengtl respectiv:ly.In ferroelectric phase,the surface susceptibility is gcllcrally reduced for8<0.But the crurve is not molnotonic,there is a mininum in the surface layer.Forδ>0,the surface susceptibility is.redced forδ<<βand enhanced fo rδ-β.The curve has a maxiln11 in the srface layer.展开更多
200keV Xe ions were implanted in potassium titanyl phosphate(KTP)at deferent angles:0°,45°and 60°.The lateral spread of Xe ions in KTP was studied by Rutherford backscattering of 2.1 MeV He ions.The res...200keV Xe ions were implanted in potassium titanyl phosphate(KTP)at deferent angles:0°,45°and 60°.The lateral spread of Xe ions in KTP was studied by Rutherford backscattering of 2.1 MeV He ions.The result is compared with the theoretical prediction.The lateral spread is found in good agreement with calculated value within 17%.展开更多
文摘The profilc of susceptibility uear the surfuce of a senni-ifinite frrclectric is calculatel from Luidau free energy.In surfunce ferroclectric plase,the susceptibility is reduced at surface for|δ|<<βand much enhanced for|δ|-β,whereδandβare the.extrapolation le1ngth and tle coluerent lengtl respectiv:ly.In ferroelectric phase,the surface susceptibility is gcllcrally reduced for8<0.But the crurve is not molnotonic,there is a mininum in the surface layer.Forδ>0,the surface susceptibility is.redced forδ<<βand enhanced fo rδ-β.The curve has a maxiln11 in the srface layer.
基金Supported by the National Natural Science Foundation of China.
文摘200keV Xe ions were implanted in potassium titanyl phosphate(KTP)at deferent angles:0°,45°and 60°.The lateral spread of Xe ions in KTP was studied by Rutherford backscattering of 2.1 MeV He ions.The result is compared with the theoretical prediction.The lateral spread is found in good agreement with calculated value within 17%.