Optimization of Spin-Triplet Supercurrent in Ferromagnetic Josephson Junctions

被引：114

作者：

Klose, Carolin ^{[1
]}

Khaire, Trupti S. ^{[1
]}

Wang, Yixing ^{[1
]}

Pratt, W. P., Jr. ^{[1
]}

Birge, Norman O. ^{[1
]}

McMorran, B. J. ^{[2
]}

Ginley, T. P. ^{[2
]}

Borchers, J. A. ^{[2
]}

Kirby, B. J. ^{[2
]}

Maranville, B. B. ^{[2
]}

Unguris, J. ^{[2
]}

机构：

[1] Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA

[2] Natl Inst Stand & Technol, Gaithersburg, MD 20899 USA

来源：

PHYSICAL REVIEW LETTERS | 2012年 / 108卷 / 12期

关键词：

HETEROSTRUCTURES;

D O I：

10.1103/PhysRevLett.108.127002

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have observed long-range spin-triplet supercurrents in Josephson junctions containing ferromagnetic (F) materials, which are generated by noncollinear magnetizations between a central Co/Ru/Co synthetic antiferromagnet and two outer thin F layers. Here we show that the spin-triplet supercurrent is enhanced up to 20 times after our samples are subject to a large in-plane field. This occurs because the synthetic antiferromagnet undergoes a "spin-flop'' transition, whereby the two Co layer magnetizations end up nearly perpendicular to the magnetizations of the two thin F layers. We report direct experimental evidence for the spin-flop transition from scanning electron microscopy with polarization analysis and from spin-polarized neutron reflectometry. These results represent a first step toward experimental control of spin-triplet supercurrents.

引用

页数：5

共 19 条

[1] Area-dependence of spin-triplet supercurrent in ferromagnetic Josephson junctions
Wang, Yixing
Pratt, W. P., Jr.
Birge, Norman O.
PHYSICAL REVIEW B, 2012, 85 (21):
[2] Amplitude Control of the Spin-Triplet Supercurrent in S/F/S Josephson Junctions
Martinez, William M.
Pratt, W. P., Jr.
Birge, Norman O.
PHYSICAL REVIEW LETTERS, 2016, 116 (07)
[3] Spin-triplet supercurrent in Co/Ni multilayer Josephson junctions with perpendicular anisotropy
Gingrich, E. C.
Quarterman, P.
Wang, Yixing
Loloee, R.
Pratt, W. P., Jr.
Birge, Norman O.
PHYSICAL REVIEW B, 2012, 86 (22):
[4] Controllable generation of a spin-triplet supercurrent in a Josephson spin valve
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Golod, Taras
Krasnov, Vladimir M.
PHYSICAL REVIEW B, 2014, 90 (13):
[5] Josephson effect and spin-triplet pairing correlations in SF1F2S junctions
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Popovic, Zorica
Radovic, Zoran
PHYSICAL REVIEW B, 2011, 84 (06):
[6] A diagrammatic approach to triplet supercurrents in ferromagnetic Josephson junctions
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Paltoglou, Vassilis
Alexandrakis, Matthew
Flytzanis, Nikolaos
EUROPEAN PHYSICAL JOURNAL B, 2015, 88 (06)
[7] Spin supercurrent, magnetization dynamics, and φ-state in spin-textured Josephson junctions
Kulagina, Iryna
Linder, Jacob
PHYSICAL REVIEW B, 2014, 90 (05):
[8] Charge and spin currents in ferromagnetic Josephson junctions
Halterman, Klaus
Valls, Oriol T.
Wu, Chien-Te
PHYSICAL REVIEW B, 2015, 92 (17)
[9] A spin triplet supercurrent in half metal ferromagnet/superconductor junctions with the interfacial Rashba spin-orbit coupling
Niu, ZhiPing
APPLIED PHYSICS LETTERS, 2012, 101 (06)
[10] Giant triplet proximity effect in π-biased Josephson junctions with spin-orbit coupling
Jacobsen, Sol H.
Linder, Jacob
PHYSICAL REVIEW B, 2015, 92 (02):

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