Chinese Physics C > 2001, Vol. 25 > Issue(S1): 100-105

Bragg Diffraction and Its Simulation of Ba TiO₃/SrTiO₃Superlattices

Institute of Physics & Center for Condensed Matter Physics,CAS,Beijing 100080,China2 Laboratory of Optical Physics,Institute of Physics & Center for Condensed Matter Physics,CAS,Beijing 100080,China3 Institue of High Energy Physics,CAS,Beijing 100039,China

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Abstract：
Ba TiO ₃/SrTiO ₃(BTO/STO)superlattices were examined by using X-ray agazing grazing incidence diffraction under total external reflection conditions and ordinary Bragg diffraction.Dynamical diffraction theory was used to simulate Bragg diffractions.It is shown that,these superlattices partially relaxed.However,unlike semiconductor epilayers or superlattices,the lattice constants of BTO/STO superlattices do not completely obey the role of tetragonal distortion.The perpendicular lattice constants deviate slightly from that predicted by elasticity theory.These deviations are probably relevant to the structures of oxide materials.

References

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CUI Shu-Fan, LUO Guang-Ming, YU Wen-Xue, CHEN Xiang-Ming, LIU Cui-Xiu, LI Ming, MAI Zhen-Hong, LU Hui-Bin, CHEN Zheng-Hao, JIA Quan-Jie, ZHENG Wen-Li and JIANG Xiao-Ming. Bragg Diffraction and Its Simulation of Ba TiO ₃/SrTiO ₃Superlattices[J]. Chinese Physics C, 2001, 25(S1): 100-105.

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Received: 1900-01-01
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

Bragg Diffraction and Its Simulation of Ba TiO₃/SrTiO₃Superlattices

Corresponding author:CUI Shu-Fan,

Institute of Physics & Center for Condensed Matter Physics,CAS,Beijing 100080,China2 Laboratory of Optical Physics,Institute of Physics & Center for Condensed Matter Physics,CAS,Beijing 100080,China3 Institue of High Energy Physics,CAS,Beijing 100039,China

Received Date:1900-01-01
Accepted Date:1900-01-01
Available Online:2001-06-22

Abstract:Ba TiO₃/SrTiO₃(BTO/STO)superlattices were examined by using X-ray agazing grazing incidence diffraction under total external reflection conditions and ordinary Bragg diffraction.Dynamical diffraction theory was used to simulate Bragg diffractions.It is shown that,these superlattices partially relaxed.However,unlike semiconductor epilayers or superlattices,the lattice constants of BTO/STO superlattices do not completely obey the role of tetragonal distortion.The perpendicular lattice constants deviate slightly from that predicted by elasticity theory.These deviations are probably relevant to the structures of oxide materials.