Evaluation of magnetic properties of uniform nanoparticle films for superconductor-spin hybrid devices using nanoSQUIDs

我们研究了磁性纳米颗粒（NP）图案插入超导器件中的磁效应，以开发超导-自旋混合器件，从而提高超导电路的性能并为电路添加新的功能。我们发现，NP膜图案与高磁导率，或剩余磁化强度得到使用纳米粒子与适当的颗粒尺寸。我们还开发了用于生产纳米SQUID的高均匀性NbN约瑟夫森结和高温超导器件的制造工艺。

We studied the magnetic effects of magnetic nanoparticle (NP) patterns inserted into superconducting devices to develop superconductor-spin hybrid devices, which enhance the performance of superconducting circuits and add new functionality to the circuits. W e found that NP film patterns with high permeability, or residual magnetization were obtained using NPs with appropriate particle size. We also developed fabrication processes of high-uniformity NbN Josephson junctions and high-temperature superconductor devices for producing nanoSQUIDs.