Suppression of superconductivity in Nb by IrMn in IrMn/Nb bilayers

B. L. Wu; Y. M. Yang; Zaibing Guo; Y. H. Wu; J. J. Qiu

doi:10.1063/1.4824891

Suppression of superconductivity in Nb by IrMn in IrMn/Nb bilayers

B. L. Wu, Y. M. Yang, Zaibing Guo, Y. H. Wu, J. J. Qiu

Imaging & Characterization Core Lab

Research output: Contribution to journal › Article › peer-review

16 Scopus citations

Abstract

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.

Original language	English (US)
Pages (from-to)	152602
Journal	Applied Physics Letters
Volume	103
Issue number	15
DOIs	https://doi.org/10.1063/1.4824891
State	Published - Oct 11 2013

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

Access to Document

10.1063/1.4824891

https://repository.kaust.edu.sa/bitstream/10754/552319/1/1.4824891.pdf

Cite this

@article{599d4c619f1c42119a4c4c194b6f7a0f,

title = "Suppression of superconductivity in Nb by IrMn in IrMn/Nb bilayers",

abstract = "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.",

author = "Wu, {B. L.} and Yang, {Y. M.} and Zaibing Guo and Wu, {Y. H.} and Qiu, {J. J.}",

note = "KAUST Repository Item: Exported on 2020-10-01",

year = "2013",

month = oct,

day = "11",

doi = "10.1063/1.4824891",

language = "English (US)",

volume = "103",

pages = "152602",

journal = "Applied Physics Letters",

issn = "0003-6951",

publisher = "American Institute of Physics",

number = "15",

}

TY - JOUR

T1 - Suppression of superconductivity in Nb by IrMn in IrMn/Nb bilayers

AU - Wu, B. L.

AU - Yang, Y. M.

AU - Guo, Zaibing

AU - Wu, Y. H.

AU - Qiu, J. J.

N1 - KAUST Repository Item: Exported on 2020-10-01

PY - 2013/10/11

Y1 - 2013/10/11

N2 - 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.

AB - 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.

UR - http://hdl.handle.net/10754/552319

UR - http://scitation.aip.org/content/aip/journal/apl/103/15/10.1063/1.4824891

UR - http://www.scopus.com/inward/record.url?scp=84886885004&partnerID=8YFLogxK

U2 - 10.1063/1.4824891

DO - 10.1063/1.4824891

M3 - Article

SN - 0003-6951

VL - 103

SP - 152602

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 15

ER -

Suppression of superconductivity in Nb by IrMn in IrMn/Nb bilayers

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this