Effect of doping with Nd{sup 3+} ions on the structural and ferroelectric properties of Ca{sub 0.28}Ba{sub 0.72}Nb{sub 2}O{sub 6} single crystal

The crystal structure of Ca{sub 0.28}Ba{sub 0.72}Nb{sub 2}O{sub 6} (CBN-28) crystal with Nd-doping has been determined from X-ray single crystal diffraction data, in the tetragonal system with space group P4bm and the following parameters: a = b = 12.458 A, c = 3.954 A, V = 613.688 A{sup 3}, and Z =...

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Bibliographic Details
Published in:Materials research bulletin 2010-09, Vol.45 (9)
Main Authors: Gao, W.L., Zhang, H.J., Xia, S.Q., Huang, B.B., Liu, D., Wang, J.Y., Jiang, M.H., Zheng, L.M., Wang, J.F., Lu, C.J.
Format: Article
Language:English
Subjects:
CALCIUM IONS
DIELECTRIC PROPERTIES
DOPED MATERIALS
FERROELECTRIC MATERIALS
MATERIALS SCIENCE
MONOCRYSTALS
NEODYMIUM IONS
TETRAGONAL LATTICES
X-RAY DIFFRACTION
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Summary:The crystal structure of Ca{sub 0.28}Ba{sub 0.72}Nb{sub 2}O{sub 6} (CBN-28) crystal with Nd-doping has been determined from X-ray single crystal diffraction data, in the tetragonal system with space group P4bm and the following parameters: a = b = 12.458 A, c = 3.954 A, V = 613.688 A{sup 3}, and Z = 5. X-ray diffraction results on a Nd-doped CBN-28 single crystal also have demonstrated that Nd{sup 3+} and Ca{sup 2+} occupy the same site in the crystal structure. Dielectric and ferroelectric measurements have been performed. Transition from ferroelectric to paraelectric at around 223 {sup o}C has been observed. The Nd-doped crystal has a lower Curie temperature (T{sub m}) than that of undoped CBN-28 crystal. The spontaneous polarization (P{sub s}) and coercive electric field (E{sub c}) also decrease compared with their values in the undoped CBN-28 crystal.
ISSN:0025-5408
1873-4227
DOI:10.1016/J.MATERRESBULL.2010.05.024