A single phase four-layer Aurivillius structured ferroelectric ceramic, (Ca_0.2Sr_0.2Ba_0.2Pb_0.2Nd_0.1Na_0.1)Bi₄Ti₄O₁₅ (6ABTO) was obtained using a high entropy design concept. The material, which has orthorhombic symmetry in space group A2₁am at room temperature, has Ca²⁺, Sr²⁺, Ba²⁺, Pb²⁺, Nd³⁺ and Na⁺ distributed not only on the A sites of the perovskite layer but also in the bismuthate layer. 6ABTO shows complex ferroelectric behavior, with a Curie point of 557 °C. Four current peaks are observed in the current - electric field curve. These peaks are attributed to a combination of a field induced phase transition and domain wall switching, which is the first reported occurrence of such current - electric field behavior for an Aurivillius structured ferroelectric material. Despite the level of disorder between the A site cations in the perovskite layer and the Bi positions in the bismuthate layer, 6ABTO does not show the relaxor ferroelectric behavior, that is commonly observed in cases of such disorder. This suggests that relaxor behavior in ferroelectrics, may be more associated with the thermal stability of dipoles, rather than the presence of polar nano-regions formed as a result of chemical disorder. The nature of the high entropy effect in 6ABTO is discussed through comparison of results from isostructural compositions containing 5, 4 and 3 of the component cations

使用高熵设计概念获得了单相四层​​ Aurivillius 结构的铁电陶瓷 (Ca _0.2 Sr _0.2 Ba _0.2 Pb _0.2 Nd _0.1 Na _0.1 )Bi ₄ Ti ₄ O _{15 (6ABTO)。}室温下在空间群A 2 ₁ am正交对称的材料有Ca ²⁺、Sr ²⁺、Ba ²⁺、Pb ²⁺、Nd ³⁺和Na ⁺不仅分布在钙钛矿层的A位上，而且分布在铋酸盐层中。6ABTO 显示出复杂的铁电行为，居里点为 557 °C。在电流-电场曲线中观察到四个电流峰值。这些峰值归因于场诱导相变和畴壁切换的组合，这是首次报道的 Aurivillius 结构铁电材料出现这种电流-电场行为的情况。尽管钙钛矿层中的 A 位阳离子和铋酸盐层中的 Bi 位置之间存在一定程度的无序，但 6ABTO 并没有表现出弛豫铁电行为，这在这种无序的情况下很常见。这表明铁电体中的弛豫行为可能与偶极子的热稳定性更相关，而不是由于化学无序而形成的极性纳米区域的存在。通过比较含有 5、4 和 3 种阳离子的同构组合物的结果，讨论了 6ABTO 中高熵效应的性质