Ferromagnetic Josephson junctions based on epitaxial NbN/Ni60Cu40/NbN trilayer
Source abstract
Abstract
We fabricated and characterized a weakly coupled magnetic Josephson junction based on epitaxial NbN/Ni60Cu40/NbN trilayer heterostructures on single crystal MgO (100) substrates. X-ray diffraction and cross-sectional scanning transmission electron microscopy were used to verify the epitaxial growth of NbN/Ni60Cu40/NbN trilayer, while the ferromagnetic properties of NiCu on NbN film were recorded by plotting the magnetization as a function of both the temperature and the magnetic field strength. The NbN/Ni60Cu40/NbN junctions demonstrated typical Josephson effect with a nonlinear overdamped current–voltage characteristic and a characteristic voltage of 9.1 μV. The magnetic field dependence of the junction critical current showed a nearly ideal Fraunhofer-like pattern with a magnetic field shift of about 12 Oe due to the remanent magnetization of Ni60Cu40 layer.
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Research context
OpenAlex topics: Physics of Superconductivity and Magnetism · Magnetic properties of thin films · Quantum and electron transport phenomena
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
State Key Laboratory of Functional Material for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences 1 , Shanghai 200050, China
CAS Center for Excellence in Superconducting Electronics (CENSE) 2 , Shanghai 200050, China
University of Chinese Academy of Sciences 3 , Beijing 100049, China
School of Physical Science and Technology, University of ShanghaiTech 4 , Shanghai 200031, China
References (28)
Show source-provided references
1. Appl Phys Lett · 1979 · 35 · 81210.1063/1.90946 ↗
2. Appl Phys Lett · 1979 · 34 · 34510.1063/1.90782 ↗
3. IEEE T Appl Supercon · 1991 · 1 · 310.1109/77.80745 ↗
4. Nature · 2008 · 453 · 103110.1038/nature07128 ↗
5. IEEE T Appl Supercon · 1998 · 8 · 4810.1109/77.678441 ↗
6. Appl Phys Lett · 2001 · 79 · 294010.1063/1.1414304 ↗
7. J Appl Phys · 2003 · 94 · 540510.1063/1.1604964 ↗
8. Phys Rev Lett · 2005 · 95 · 09700110.1103/physrevlett.95.097001 ↗
9. Physics Procedia · 2012 · 36 · 3510.1016/j.phpro.2012.06.126 ↗
10. Physical Review · 1962 · 128 · 59110.1103/physrev.128.591 ↗
11. Appl Phys Lett · 1997 · 70 · 11410.1063/1.119279 ↗
12. Usp Fiz Nauk · 1999 · 169 · 92010.3367/ufnr.0169.199908g.0920 ↗
13. Phys Rev B · 2009 · 79
14. JETP Lett · 2012 · 95 · 36610.1134/s0021364012070028 ↗
15. Jpn J Appl Phys · 1974 · 613
16. J Appl Phys · 1974 · 45 · 138910.1063/1.1663418 ↗
17. J Appl Phys · 1996 · 79 · 783710.1063/1.362392 ↗
18. Appl Phys Lett · 1992 · 60 · 162410.1063/1.107220 ↗
19. J Appl Phys · 1983 · 54 · 650910.1063/1.331881 ↗
20. Superconducting properties and crystal structures of single-crystal niobium nitride thin films deposited at ambient substrate temperature10.1063/1.362392 ↗
21. Appl Phys Lett · 2006 · 89 · 12251110.1063/1.2356104 ↗
22. Phys Rev Appl · 2017 · 8
23. Appl Phys Lett · 2015 · 106 · 02260210.1063/1.4905672 ↗
24. Appl Phys Lett · 1994 · 64 · 203410.1063/1.111730 ↗
25. J Appl Phys · 1987 · 62 · 96110.1063/1.339708 ↗
26. Phys Rev B · 2004 · 70 · 14450510.1103/physrevb.70.144505 ↗
27. Phys Rev B · 2005 · 71 · 18050110.1103/physrevb.71.180501 ↗
28. IEEE T Appl Supercon · 2017 · 27