Spin-triplet supercurrent in Josephson junctions containing a synthetic antiferromagnet with perpendicular magnetic anisotropy
Abstract
In this paper, we present measurements of Josephson junctions containing three magnetic layers with noncollinear magnetizations. The junctions are of the form , where is superconducting Nb, is either a thin Ni or Permalloy layer with in-plane magnetization, is the normal metal Cu, is a synthetic antiferromagnet with magnetization perpendicular to the plane, composed of Pd/Co multilayers on either side of a thin Ru spacer, and is a thin Ni layer with in-plane magnetization. The supercurrent in these junctions decays more slowly as a function of the -layer thickness than for similar spin-singlet junctions not containing the and layers. The slower decay is the prime signature that the supercurrent in the central part of these junctions is carried by spin-triplet pairs. Finally, the junctions containing Permalloy are suitable for future experiments where either the amplitude of the critical current or the ground-state phase difference across the junction is controlled by changing the relative orientations of the magnetizations of the and layers.
- Authors:
-
- Michigan State Univ., East Lansing, MI (United States). Dept. of Physics and Astronomy
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Publication Date:
- Research Org.:
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Michigan State Univ., East Lansing, MI (United States)
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA); Intelligence Advanced Research Projects Activity (IARPA) (United States); US Army Research Office (ARO)
- OSTI Identifier:
- 1472262
- Alternate Identifier(s):
- OSTI ID: 1416447
- Report Number(s):
- SAND2018-9468J
Journal ID: ISSN 2469-9950; 667435
- Grant/Contract Number:
- NA0003525; W911NF-14-C-0115
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review B
- Additional Journal Information:
- Journal Volume: 96; Journal Issue: 22; Journal ID: ISSN 2469-9950
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ferromagnetism; Josephson effect; spin-triplet pairing; superconductivity
Citation Formats
Glick, Joseph A., Edwards, Samuel, Korucu, Demet, Aguilar, Victor, Niedzielski, Bethany M., Loloee, Reza, Pratt, W. P., Birge, Norman O., Kotula, P. G., and Missert, N. Spin-triplet supercurrent in Josephson junctions containing a synthetic antiferromagnet with perpendicular magnetic anisotropy. United States: N. p., 2017.
Web. doi:10.1103/PhysRevB.96.224515.
Glick, Joseph A., Edwards, Samuel, Korucu, Demet, Aguilar, Victor, Niedzielski, Bethany M., Loloee, Reza, Pratt, W. P., Birge, Norman O., Kotula, P. G., & Missert, N. Spin-triplet supercurrent in Josephson junctions containing a synthetic antiferromagnet with perpendicular magnetic anisotropy. United States. https://doi.org/10.1103/PhysRevB.96.224515
Glick, Joseph A., Edwards, Samuel, Korucu, Demet, Aguilar, Victor, Niedzielski, Bethany M., Loloee, Reza, Pratt, W. P., Birge, Norman O., Kotula, P. G., and Missert, N. Thu .
"Spin-triplet supercurrent in Josephson junctions containing a synthetic antiferromagnet with perpendicular magnetic anisotropy". United States. https://doi.org/10.1103/PhysRevB.96.224515. https://www.osti.gov/servlets/purl/1472262.
@article{osti_1472262,
title = {Spin-triplet supercurrent in Josephson junctions containing a synthetic antiferromagnet with perpendicular magnetic anisotropy},
author = {Glick, Joseph A. and Edwards, Samuel and Korucu, Demet and Aguilar, Victor and Niedzielski, Bethany M. and Loloee, Reza and Pratt, W. P. and Birge, Norman O. and Kotula, P. G. and Missert, N.},
abstractNote = {In this paper, we present measurements of Josephson junctions containing three magnetic layers with noncollinear magnetizations. The junctions are of the form S/F'/N/F/N/F"/S, where S is superconducting Nb, F' is either a thin Ni or Permalloy layer with in-plane magnetization, N is the normal metal Cu, F is a synthetic antiferromagnet with magnetization perpendicular to the plane, composed of Pd/Co multilayers on either side of a thin Ru spacer, and F" is a thin Ni layer with in-plane magnetization. The supercurrent in these junctions decays more slowly as a function of the F-layer thickness than for similar spin-singlet junctions not containing the F' and F" layers. The slower decay is the prime signature that the supercurrent in the central part of these junctions is carried by spin-triplet pairs. Finally, the junctions containing F'= Permalloy are suitable for future experiments where either the amplitude of the critical current or the ground-state phase difference across the junction is controlled by changing the relative orientations of the magnetizations of the F' and F" layers.},
doi = {10.1103/PhysRevB.96.224515},
journal = {Physical Review B},
number = 22,
volume = 96,
place = {United States},
year = {Thu Dec 28 00:00:00 EST 2017},
month = {Thu Dec 28 00:00:00 EST 2017}
}
Web of Science
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