Physical Review B, volume 79, issue 5, publication number 054501

Josephson tunnel junctions with a strong ferromagnetic interlayer

A. A. Bannykh 1
J. Pfeiffer 2
V. S. Stolyarov 3
I.E. Batov 3
V. V. Ryazanov 3
V V Ryazanov 3
M Weides 4
Publication typeJournal Article
Publication date2009-02-02
Quartile SCImago
Q1
Quartile WOS
Q2
Impact factor3.7
ISSN24699950, 24699969, 10980121, 1550235X
Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Abstract
The dependence of the critical current density ${j}_{c}$ on the ferromagnetic interlayer thickness ${d}_{F}$ was determined for $\text{Nb}/{\text{Al}}_{2}{\text{O}}_{3}/\text{Cu}/\text{Ni}/\text{Nb}$ Josephson tunnel junctions with ferromagnetic Ni interlayer thicknesses from very thin films $(\ensuremath{\sim}1\text{ }\text{nm})$ upward and classified into $F$-layer thickness regimes showing a dead magnetic layer, exchange, $\text{exchange}+\text{anisotropy}$ and total suppression of ${j}_{c}$. The Josephson coupling changes from 0 to $\ensuremath{\pi}$ as function of ${d}_{F}$, and\char22{}very close to the crossover thickness\char22{}as function of temperature. The strong suppression of the supercurrent in comparison to nonmagnetic $\text{Nb}/{\text{Al}}_{2}{\text{O}}_{3}/\text{Cu}/\text{Nb}$ junctions indicated that the insertion of a $F$ layer leads to additional interface scattering. The transport inside the dead magnetic layer was in dirty limit. For the magnetically active regime fitting with both the clean and the dirty limit theories was carried out, indicating dirty limit condition, too. The results were discussed in the framework of literature.

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Bannykh A. A. et al. Josephson tunnel junctions with a strong ferromagnetic interlayer // Physical Review B. 2009. Vol. 79. No. 5. 054501
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Bannykh A. A., Pfeiffer J., Stolyarov V. S., Stolyarov V. S., Batov I., Ryazanov V. V., Ryazanov V. V., Weides M., Weides M. P. Josephson tunnel junctions with a strong ferromagnetic interlayer // Physical Review B. 2009. Vol. 79. No. 5. 054501
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RIS Copy
TY - JOUR
DO - 10.1103/PhysRevB.79.054501
UR - https://doi.org/10.1103/PhysRevB.79.054501
TI - Josephson tunnel junctions with a strong ferromagnetic interlayer
T2 - Physical Review B
AU - Bannykh, A. A.
AU - Pfeiffer, J.
AU - Stolyarov, V. S.
AU - Batov, I.E.
AU - Weides, M
AU - Ryazanov, V. V.
AU - Stolyarov, V. S.
AU - Ryazanov, V V
AU - Weides, Martin P.
PY - 2009
DA - 2009/02/02
PB - American Physical Society (APS)
IS - 5
VL - 79
SN - 2469-9950
SN - 2469-9969
SN - 1098-0121
SN - 1550-235X
ER -
BibTex
Cite this
BibTex Copy
@article{2009_Bannykh,
author = {A. A. Bannykh and J. Pfeiffer and V. S. Stolyarov and I.E. Batov and M Weides and V. V. Ryazanov and V. S. Stolyarov and V V Ryazanov and Martin P. Weides},
title = {Josephson tunnel junctions with a strong ferromagnetic interlayer},
journal = {Physical Review B},
year = {2009},
volume = {79},
publisher = {American Physical Society (APS)},
month = {feb},
url = {https://doi.org/10.1103/PhysRevB.79.054501},
number = {5},
doi = {10.1103/PhysRevB.79.054501}
}
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