TY  - JOUR
AU  - Weides, M.
AU  - Kemmler, M.
AU  - Kohlstedt, H.
AU  - Waser, R.
AU  - Koelle, D.
AU  - Kleiner, R.
AU  - Goldobin, E.
TI  - O-pi Josephson tunnel junctions with ferromagnetic barrier
JO  - Physical review letters
VL  - 97
SN  - 0031-9007
CY  - College Park, Md.
PB  - APS
M1  - PreJuSER-54855
SP  - 247001
PY  - 2006
N1  - Record converted from VDB: 12.11.2012
AB  - We fabricated high quality Nb/Al2O3/Ni0.6Cu0.4/Nb superconductor-insulator-ferromagnet-superconductor Josephson tunnel junctions. Using a ferromagnetic layer with a steplike thickness, we obtain a 0-pi junction, with equal lengths and critical currents of 0 and pi parts. The ground state of our 330 mu m (1.3 lambda(J)) long junction corresponds to a spontaneous vortex of supercurrent pinned at the 0-pi step and carrying similar to 6.7% of the magnetic flux quantum Phi(0). The dependence of the critical current on the applied magnetic field shows a clear minimum in the vicinity of zero field.
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000242888700054
DO  - DOI:10.1103/PhysRevLett.97.247001
UR  - https://juser.fz-juelich.de/record/54855
ER  -