论文标题
NB/CO超导体/铁磁异质结构中磁状态的原位传输表征
In situ transport characterization of magnetic states in Nb/Co superconductor/ferromagnet heterostructures
论文作者
论文摘要
非平地近端效应在超导体/铁磁铁（S/F）异质结构中用于创建新型超导设备的异质结构需要准确控制复杂的薄膜多层型中的磁状态。在这项工作中，我们研究了微结构NB/CO多层的实验面内运输特性。我们采用各种运输特征技术，包括磁性，霍尔效应和一阶反转曲线（FORC）分析。我们演示了如何将福克用于详细的磁态原位表征。它表明，在外部磁场还原后，铁磁层中的磁化首先以连贯的剪刀状的方式旋转，然后突然切换到反平行状态，然后将其分裂为多域状态，该状态逐渐变成相反的平行状态。
Employment of the non-trivial proximity effect in superconductor/ferromagnet (S/F) heterostructures for the creation of novel superconducting devices requires accurate control of magnetic states in complex thin-film multilayers. In this work, we study experimentally in-plane transport properties of microstructured Nb/Co multilayers. We apply various transport characterization techniques, including magnetoresistance, Hall effect, and the first-order-reversal-curves (FORC) analysis. We demonstrate how FORC can be used for detailed in situ characterization of magnetic states. It reveals that upon reduction of the external field, the magnetization in ferromagnetic layers first rotates in a coherent scissor-like manner, then switches abruptly into the antiparallel state and after that splits into the polydomain state, which gradually turns into the opposite parallel state.
