Strong ferromagnetic Josephson devices with optimized magnetism

Robinson, J. W. A.; Barber, Z. H.; Blamire, M. G.
November 2009
Applied Physics Letters;11/9/2009, Vol. 95 Issue 19, p192509
Academic Journal
We show that by interfacing Co with Rh in Nb-based superconductor-ferromagnetic-superconductor (SFS) Josephson devices, the bulk magnetization of the Co barrier is completely preserved, thus eliminating the issue of a magnetic dead layer present in other SFS devices. Electrical measurements demonstrate high transparency for Cooper pairs at the Rh/Co interface which results in large critical currents in the π state which are comparable to those of Nb/Co/Nb devices [J. W. A. Robinson et al., Phys. Rev. Lett. 97, 177003 (2006)].


Related Articles

  • Properties of Josephson Junctions in the Inhomogeneous Magnetic Field of a System of Ferromagnetic Particles. Vdovichev, S. N.; Gribkov, B. A.; Gusev, S. A.; Il'ichev, E.; Klimov, A. Yu.; Nozdrin, Yu. N.; Pakhomov, G. L.; Rogov, V. V.; Stolz, R.; Fraerman, A. A. // JETP Letters;11/10/2004, Vol. 80 Issue 9, p651 

    The effect of a system of ferromagnetic particles on the field-dependent critical current of a Josephson junction is experimentally studied for junctions of different geometries. For edge junctions, the effect of commensurability between the periodic magnetic field of the particles and the...

  • Microscopic theory of equilibrium properties of F/S/F trilayers with weak ferromagnets. Mélin, R. // European Physical Journal B -- Condensed Matter;May2004, Vol. 39 Issue 2, p249 

    The aim of this paper is to explain the non monotonic temperature dependence of the self-consistent superconducting gap of ferromagnet/superconductor/ferromagnet (F/S/F) trilayers with weak ferromagnets in the parallel alignment (equivalent to F/S bilayers). We show that this is due to Andreev...

  • Josephson Hall current in a noncentrosymmetric superconductor/ferromagnet/superconductor junction. Wang, Jun; Hao, Lei; Yang, Y. H.; Chan, K. S. // Journal of Applied Physics;Dec2011, Vol. 110 Issue 11, p113717 

    We theoretically study the transverse spin and charge transport in a 2D noncentrosymmetric superconductor (NCS)/ferromagnet (FM)/superconductor Josephson junction, in which the NCS has a dominant triplet order parameter and helical edge states. It is predicted that both equilibrium spin and...

  • Tunneling conductance and magnetoresistance in topological insulator Fi/I/Fi/d-wave superconductor junctions. Vali, R.; Vali, Mehran // Journal of Applied Physics;Nov2012, Vol. 112 Issue 10, p103919 

    We investigate the tunneling conductance and tunneling magnetoresistance (TMR) in topological insulator ferromagnetic insulator/insulator/ferromagnetic insulator/d-wave superconductor (Fi/I/Fi/d-wave SC) junction, by applying the Blonder-Tinkham-Klapwijk approach. We find that the multiple...

  • High-field Josephson magnetic resonance in high-temperature superconductors. Belevtsov, L. V.; D’yachenko, A. I. D.; Kostikov, A. A. // Technical Physics Letters;Jul2006, Vol. 32 Issue 7, p600 

    The possibility of high-field Josephson magnetic resonance (HFJMR) in high-temperature super-conductors (HTSCs) is theoretically demonstrated. The HFJMR mechanism is related to the Josephson oscillations in intergranular junctions of a polycrystalline HTSC, which are caused by the penetration of...

  • Critical Current in SFIFS Junctions. Golubov, A. A.; Kupriyanov, M. Yu.; Fominov, Ya. V. // JETP Letters;2/25/2002, Vol. 75 Issue 4, p190 

    A quantitative theory of the Josephson effect in SFIFS junctions (S denotes bulk superconductor, F is metallic ferromagnet, and I is insulating barrier) is presented in the dirty limit. A fully self-consistent numerical procedure is employed to solve the Usadel equations for arbitrary values of...

  • On the origin of reentrance in 2D Josephson junction arrays. Araujo-Moreira, F. M.; Maluf, W.; Sergeenkov, S. // European Physical Journal B -- Condensed Matter;Mar2005, Vol. 44 Issue 1, p33 

    A comparative study of the magnetic properties of shunted and unshunted two-dimensional Josephson junction arrays (2D-JJA) is presented. Using a single-plaquette approximation of the 2D-JJA model, we were able to successfully fit all our experimental data (for the temperature, AC and DC field...

  • Formation of a quasi-uniform sequence of vortices in a periodically modulated finite-length Josephson contact. Zelikman, M. // Technical Physics;Dec2009, Vol. 54 Issue 12, p1742 

    The configurations of currents and the profile of a magnetic field penetrating into a finite-length contact at I < I C are calculated. The computational method is based on analyzing the continuous variation of the current structure leading to a decrease in the Gibbs potential. Such an approach...

  • Enhanced spin accumulation in a superconductor. Urech, M.; Johansson, J.; Poli, N.; Korenivski, V.; Haviland, D. B. // Journal of Applied Physics;4/15/2006, Vol. 99 Issue 8, p08M513 

    A lateral array of ferromagnetic tunnel junctions is used to inject and detect nonequilibrium quasiparticle spin distribution in a superconducting strip made of Al. The strip width and thickness are kept below the quasiparticle spin diffusion length in Al. Nonlocal measurements in multiple...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics