Magnetism and superconductivity are mutually exclusive phenomena and their interactions are interesting to study. In this work we studied the effects of antiferromagnetic FeS additions on the superconducting properties of Bi_1.6Pb_0.4Sr₂CaCu₂O₈ (Bi-2212). Samples with starting composition Bi_1.6Pb_0.4Sr₂CaCu₂O₈(FeS)_x for x = 0–5.0 wt% were prepared using the solid state reaction method. The powder X-ray diffraction (XRD) patterns showed that the Bi-2212 phase was dominant in samples with x ≤ 0.2 wt% (≥92% volume fraction). Field emission scanning electron micrographs showed plate-like structure which increased in flakiness with FeS addition. The non-added samples showed the highest zero resistance temperature, T_c-zero and onset temperature, T_c-onset at 72 K and 83 K, respectively. The peak temperature, T_p of the imaginary part of the AC susceptibility increased for x ≤ 0.2 wt% samples indicating an increase in the flux pinning force. The x = 5.0 wt% samples showed the Bi-2212 (63%) and Bi-2201 (37%) phase and semiconducting-like behavior without any superconducting transition. This work showed that nano-sized FeS can be used to increase the flakiness and flux pinning force of Bi_1.6Pb_0.4Sr₂CaCu₂O₈ for x ≤ 0.2 wt%.

磁性和超导性是互斥的现象，它们之间的相互作用值得研究。在这项工作中，我们研究了反铁磁性FeS的添加对Bi _1.6 Pb _0.4 Sr ₂ CaCu ₂ O ₈（Bi-2212）的超导性能的影响。 使用固态反应方法制备的样品的起始成分为Bi _1.6 Pb _0.4 Sr ₂ CaCu ₂ O ₈（FeS）_x（x = 0-5.0 wt％）。粉末X射线衍射（XRD）图谱显示Bi-2212相在含x的样品中占主导地位 ≤0.2 wt％（≥92％体积分数）。场发射扫描电子显微照片显示出板状结构，其随着添加FeS而脆性增加。未添加的样品分别在72 K和83 K处显示出最高的零电阻温度T _c-零和起始温度T _c-起始。峰值温度，Ť _p的交流磁化率的虚部的增加为X  ≤0.2％（重量）的样品表示在焊剂钉扎力的增加。该X = 5.0 wt％的样品显示Bi-2212（63％）和Bi-2201（37％）相和类似半导体的行为，没有任何超导转变。这项工作表明，纳米尺寸的FeS可用于增加片状和通量的Bi钉扎力_1.6铅_0.4的Sr ₂ CaCu ₂ ø ₈为X  ≤0.2％（重量）。