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Title: Spin-triplet supercurrent in Josephson junctions containing a synthetic antiferromagnet with perpendicular magnetic anisotropy

Journal Article · · Physical Review B
 [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [2];  [2]
  1. Michigan State Univ., East Lansing, MI (United States). Dept. of Physics and Astronomy
  2. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

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.

Research Organization:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Michigan State Univ., East Lansing, MI (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA); Intelligence Advanced Research Projects Activity (IARPA) (United States); US Army Research Office (ARO)
Grant/Contract Number:
NA0003525; W911NF-14-C-0115
OSTI ID:
1472262
Alternate ID(s):
OSTI ID: 1416447
Report Number(s):
SAND2018-9468J; 667435
Journal Information:
Physical Review B, Vol. 96, Issue 22; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 12 works
Citation information provided by
Web of Science

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Cited By (8)

Superconductor Electronics: Status and Outlook journal November 2018
Nonmonotonic aftereffect measurements in perpendicular synthetic ferrimagnets journal August 2018
Supercurrent in ferromagnetic Josephson junctions with heavy-metal interlayers. II. Canted magnetization journal May 2019
Memory-functionality superconductor/ferromagnet/superconductor junctions based on the high- T c cuprate superconductors YBa 2 Cu 3 O 7 − x and the colossal magnetoresistive manganite ferromagnets La 2 / 3 X 1 / 3 MnO 3 + δ ( X = Ca , Sr ) journal June 2019
Phase control in a spin-triplet SQUID journal July 2018
Nonmonotonic aftereffect measurements in perpendicular synthetic ferrimagnets text January 2018
Phase Control in a Spin-Triplet SQUID text January 2018
Supercurrent in ferromagnetic Josephson junctions with heavy metal interlayers. II. Canted magnetization text January 2019

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