caa a22 4500 463212665 CHVBK 20180405153146.0 cr unu---uuuuu 170326e20071101xx s 000 0 eng 10.1007/s00339-007-4206-3 doi (NATIONALLICENCE)springer-10.1007/s00339-007-4206-3 Ferromagnetic 0- π Josephson junctions [Elektronische Daten] [M. Weides, H. Kohlstedt, R. Waser, M. Kemmler, J. Pfeiffer, D. Koelle, R. Kleiner, E. Goldobin] We present a study on low-Tc superconductor-insulator-ferromagnet-superconductor (SIFS) Josephson junctions. SIFS junctions have gained considerable interest in recent years because they show a number of interesting properties for future classical and quantum computing devices. We optimized the fabrication process of these junctions to achieve a homogeneous current transport, ending up with high-quality samples. Depending on the thickness of the ferromagnetic layer and on temperature, the SIFS junctions are in the ground state with a phase drop of either 0 or π. By using a ferromagnetic layer with variable step-like thickness along the junction, we obtained a so-called 0-π Josephson junction, in which 0 and π ground states compete with each other. At a certain temperature the 0 and π parts of the junction are perfectly symmetric, i.e. the absolute critical current densities are equal. In this case the degenerate ground state corresponds to a vortex of supercurrent circulating clock- or counterclockwise and creating a magnetic flux which carries a fraction of the magnetic flux quantum Φ0. Springer-Verlag, 2007 Weides M. Center of Nanoelectronic Systems for Information Technology (CNI), Research Centre Jülich, 52425, Jülich, Germany aut Kohlstedt H. Center of Nanoelectronic Systems for Information Technology (CNI), Research Centre Jülich, 52425, Jülich, Germany aut Waser R. Center of Nanoelectronic Systems for Information Technology (CNI), Research Centre Jülich, 52425, Jülich, Germany aut Kemmler M. Physikalisches Institut - Experimentalphysik II, Universität Tübingen, Auf der Morgenstelle 14, 72076, Tübingen, Germany aut Pfeiffer J. Physikalisches Institut - Experimentalphysik II, Universität Tübingen, Auf der Morgenstelle 14, 72076, Tübingen, Germany aut Koelle D. Physikalisches Institut - Experimentalphysik II, Universität Tübingen, Auf der Morgenstelle 14, 72076, Tübingen, Germany aut Kleiner R. Physikalisches Institut - Experimentalphysik II, Universität Tübingen, Auf der Morgenstelle 14, 72076, Tübingen, Germany aut Goldobin E. Physikalisches Institut - Experimentalphysik II, Universität Tübingen, Auf der Morgenstelle 14, 72076, Tübingen, Germany aut Applied Physics A Springer-Verlag 89/3(2007-11-01), 613-617 0947-8396 89:3<613 2007 89 339 https://doi.org/10.1007/s00339-007-4206-3 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00339-007-4206-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Weides M. Center of Nanoelectronic Systems for Information Technology (CNI), Research Centre Jülich, 52425, Jülich, Germany aut NATIONALLICENCE 700 1- Kohlstedt H. Center of Nanoelectronic Systems for Information Technology (CNI), Research Centre Jülich, 52425, Jülich, Germany aut NATIONALLICENCE 700 1- Waser R. Center of Nanoelectronic Systems for Information Technology (CNI), Research Centre Jülich, 52425, Jülich, Germany aut NATIONALLICENCE 700 1- Kemmler M. Physikalisches Institut - Experimentalphysik II, Universität Tübingen, Auf der Morgenstelle 14, 72076, Tübingen, Germany aut NATIONALLICENCE 700 1- Pfeiffer J. Physikalisches Institut - Experimentalphysik II, Universität Tübingen, Auf der Morgenstelle 14, 72076, Tübingen, Germany aut NATIONALLICENCE 700 1- Koelle D. Physikalisches Institut - Experimentalphysik II, Universität Tübingen, Auf der Morgenstelle 14, 72076, Tübingen, Germany aut NATIONALLICENCE 700 1- Kleiner R. Physikalisches Institut - Experimentalphysik II, Universität Tübingen, Auf der Morgenstelle 14, 72076, Tübingen, Germany aut NATIONALLICENCE 700 1- Goldobin E. Physikalisches Institut - Experimentalphysik II, Universität Tübingen, Auf der Morgenstelle 14, 72076, Tübingen, Germany aut NATIONALLICENCE 773 0- Applied Physics A Springer-Verlag 89/3(2007-11-01), 613-617 0947-8396 89:3<613 2007 89 339 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer