TY  - JOUR
AU  - Sprungmann, D.
AU  - Westerholt, K.
AU  - Zabel, H.
AU  - Weides, M.
AU  - Kohlstedt, H.
TI  - Josephson tunnel junctions with ferromagnetic Fe0.75Co0.25 barriers
JO  - Journal of applied physics
VL  - 42
SN  - 0021-8979
CY  - Melville, NY
PB  - American Institute of Physics
M1  - PreJuSER-3988
SP  - 075005
PY  - 2009
N1  - The authors thank R Waser, G Pickartz and R Borowski for support. DS, KW and HZ acknowledge financial support by SFB-491, and MW by project WE 4359/1-1.
AB  - Josephson tunnel junctions with the strong ferromagnetic alloy Fe0.75Co0.25 as the barrier material were studied. The junctions were prepared with high quality down to a thickness range of a few monolayers of Fe-Co. An oscillation length of xi(F2) approximate to 0.79 nm between 0 and pi-Josephson phase coupling and a very short decay length xi(F1) approximate to 0.22 nm for the amplitude of the superconducting pair wave function in the Fe-Co layer were determined. The rapid damping of the pair wave function inside the Fe-Co layer is caused by the strong ferromagnetic exchange field and additional magnetic pair breaking scattering. Josephson junctions with Fe-Co barriers show a significantly increased tendency towards magnetic remanence and flux trapping for larger thicknesses d(F.)
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000264385900011
DO  - DOI:10.1088/0022-3727/42/7/075005
UR  - https://juser.fz-juelich.de/record/3988
ER  -