Thin films of topological insulator (TI) Bi₂Se₃ were grown onto the surfaces of FeSe₂ layers of different thicknesses on Si (100) substrates by magnetron sputtering, forming bilayer films with smooth surface. Magnetic and transport measurements indicate ferromagnetism in these bilayer samples. Large coercive fields at low-temperatures and a room-temperature magnetic order were observed. Moreover, nonsaturated high-filed linear magnetoresistance (MR) and weak anti-localization effect were found in these bilayer thin films. These results indicate that the bilayer samples could have both strong spin–orbit coupling and ferromagnetic proximity effect, which are the desired features.

中文翻译：

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Bi2Se3/FeSe2双层薄膜的磁性和输运特性研究

_{通过磁控溅射在Si(100)衬底上不同厚度的FeSe 2}层表面生长拓扑绝缘体(TI) Bi ₂ Se ₃薄膜，形成表面光滑的双层薄膜。磁性和传输测量表明这些双层样品中的铁磁性。观察到低温下的大矫顽场和室温磁序。此外，在这些双层薄膜中发现了不饱和的高场线性磁阻（MR）和弱的抗局部化效应。这些结果表明，双层样品可能具有强自旋轨道耦合和铁磁邻近效应，这是所需的特征。