Suppression of superconductivity in Nb by IrMn in IrMn/Nb bilayers
Type
ArticleKAUST Department
Advanced Nanofabrication, Imaging and Characterization Core LabImaging and Characterization Core Lab
Date
2013-10-11Online Publication Date
2013-10-11Print Publication Date
2013-10-07Permanent link to this record
http://hdl.handle.net/10754/552319
Metadata
Show full item recordAbstract
Effect of antiferromagnet on superconductivity has been investigated in IrMn/Nb bilayers. Significant suppression of both transition temperature (Tc) and lower critical field (Hc1) of Nb is found in IrMn/Nb bilayers as compared to a single layer Nb of same thickness; the suppression effect is even stronger than that of a ferromagnet in NiFe/Nb bilayers. The addition of an insulating MgO layer at the IrMn-Nb interface nearly restores Tc to that of the single layer Nb, but Hc1 still remains suppressed. These results suggest that, in addition to proximity effect and magnetic impurity scattering, magnetostatic interaction also plays a role in suppressing superconductivity of Nb in IrMn/Nb bilayers. In addition to reduced Tc and Hc1, the IrMn layer also induces broadening in the transition temperature of Nb, which can be accounted for by a finite distribution of stray field from IrMn.Citation
Suppression of superconductivity in Nb by IrMn in IrMn/Nb bilayers 2013, 103 (15):152602 Applied Physics LettersPublisher
AIP PublishingJournal
Applied Physics Lettersae974a485f413a2113503eed53cd6c53
10.1063/1.4824891