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首页> 外文期刊>Journal of surface investigation: x-ray, synchrotron and neutron techniques >Neutron-Diffraction Study of the Crystal Structure of BaTiO_3 Ferroelectric Doped with Iron
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Neutron-Diffraction Study of the Crystal Structure of BaTiO_3 Ferroelectric Doped with Iron

机译：铁掺杂BaTiO_3铁电晶体结构的中子衍射研究

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摘要

The crystal structure of iron-doped barium titanate BaTi_(1 – x)Fe_xO_3 is studied by neutron diffraction in the range of 0 ≤ x ≤ 0.12. At low concentrations of iron, x < 0.01, and at room temperature, these compounds have a polar structure with tetragonal symmetry with space group P4mm. The temperature of the transition of the tetragonal ferroelectric phase into the cubic paraelectric phase with space group Pm3m for an iron concentration of x = 0.01 is 390 K (for pure BaTiO_3, it is 410 K). At an iron concentration of x = 0.07, the crystal structure of the studied compounds varies, and it is described by the centrosymmetric hexagonal space group P6_3/mmc. The structural parameters of various phases of compound BaTi_(1 – x)Fe_xO_3 are determined from the experimental data.
机译：通过中子衍射在0≤x≤0.12范围内研究了铁掺杂钛酸钡BaTi_（1 – x）Fe_xO_3的晶体结构。在低铁含量（x <0.01）和室温下，这些化合物具有极性结构，四边形对称，空间群为P4mm。铁浓度为x = 0.01时，四方铁电相转变为空间群为Pm3m的立方顺电相的温度为390 K（对于纯BaTiO_3，为410 K）。铁含量为x = 0.07时，所研究化合物的晶体结构发生变化，并由中心对称六边形空间群P6_3 / mmc进行描述。由实验数据确定了化合物BaTi_（1 – x）Fe_xO_3各个相的结构参数。

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