Mejía-Salazar J Ricardo, Perea José Darío, Castillo Roberto, Diosa Jesús Evelio, Baca Eval
National Institute of Telecommunications (Inatel), Santa Rita do Sapucaí-MG 37540-000, Brazil.
Institute of Materials for Electronics and Energy Technology (i-MEET), Friedrich-Alexander-Universitaẗ Erlangen-Nürnberg, Martensstrasse 7, 91058 Erlangen, Germany.
Materials (Basel). 2019 Mar 14;12(6):861. doi: 10.3390/ma12060861.
We report here on the development of composite thick films exhibiting hybrid superconducting and ferromagnetic properties, produced through a low-cost, fast, and versatile process. These films were made of high T cuprate superconductor Bi₂Sr₂(Ca,Y)₂Cu₃O (with Y:Ca ratio of 5%) and ferromagnetic perovskite LaBaMnO₃, synthesized by melting-quenching annealing process on a MgO substrate. Curie temperature for LaBaMnO₃ was determined (~336 K ) by magnetic field assisted thermogravimetric analysis (TGA), while superconducting behavior of Bi₂Sr₂(Ca,Y)₂Cu₃O/MgO films was observed through temperature-dependent resistance measurements. Superconducting features in our hybrid compound were corroborated by temperature-dependent resistivity and magnetic susceptibility.
我们在此报告通过低成本、快速且通用的工艺制备的具有混合超导和铁磁特性的复合厚膜的进展情况。这些薄膜由高 T 铜酸盐超导体 Bi₂Sr₂(Ca,Y)₂Cu₃O（Y:Ca 比例为 5%）和铁磁钙钛矿 LaBaMnO₃制成，通过在 MgO 衬底上的熔融淬火退火工艺合成。通过磁场辅助热重分析（TGA）确定了 LaBaMnO₃的居里温度（约 336 K），而通过温度依赖性电阻测量观察了 Bi₂Sr₂(Ca,Y)₂Cu₃O/MgO 薄膜的超导行为。我们的混合化合物中的超导特性通过温度依赖性电阻率和磁化率得到了证实。
