Abstract The magnetoresistance of superconducting Bi/Ni bilayers is investigated around the superconducting transition temperature. At temperatures within the superconducting transition, the magnetoresistance presents a superposition of symmetric peaks and hysteresis behaviors. The magnetoresistance peaks show the evidence of T C suppression due to stray fields from domain walls appearing during magnetization switching. The hysteresis behaviors show the effect of vortices motion on the superconductivity of Bi/Ni bilayers. This unusual magnetoresistance controlled by both stray fields and vortices provides a new understanding of the interaction between superconductivity and ferromagnetism in Bi/Ni bilayers.

中文翻译：

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超导 Bi/Ni 双层中的杂散场和涡流控制磁阻

摘要 在超导转变温度附近研究了超导 Bi/Ni 双层的磁阻。在超导转变内的温度下，磁阻呈现对称峰和磁滞行为的叠加。磁阻峰值显示了由于磁化转换期间出现的畴壁杂散场而导致 TC 抑制的证据。滞后行为显示了涡流运动对 Bi/Ni 双层超导性的影响。这种由杂散场和涡流控制的不寻常磁阻提供了对 Bi/Ni 双层中超导性和铁磁性之间相互作用的新理解。