K. Senapati

Spin-filter Josephson junctions

Josephson junctions with ferromagnetic barriers have been intensively investigated in recent years. Of particular interest has been the realization of so called π-junctions with a built-in phase difference, and induced triplet pairing. Such experiments have so far been limited to systems containing metallic ferromagnets. Although junctions incorporating a ferromagnetic insulator (I(F)) have been predicted to show a range of unique properties including π-shifts with intrinsically low dissipation and an unconventional temperature dependence of the critical current I(c), difficulties with the few known I(F) materials have prevented experimental tests. Here we report supercurrents through magnetic GdN barriers and show that the field and temperature dependence of I(c)is strongly modified by the I(F). In particular we show that the strong suppression of Cooper pair tunnelling by the spin filtering of the I(F) barrier can be modified by magnetic inhomogeneity in the barrier.

Superconducting and normal-state interlayer exchange coupling in La0.67Sr0.33MnO3-YBa2Cu3O7-La0.67Sr0.33MnO3 epitaxial trilayers

The issue of interlayer exchange coupling in magnetic multilayers with superconducting (SC) spacer is addressed in La

Spontaneous formation of superconducting NiBi3 phase in Ni-Bi bilayer films

_{0.67}

Irreversibility field and superconducting screening currents in EuBa2Cu3O7 films

Sr

Electric‐Field‐Dependent Spin Polarization in GdN Spin Filter Tunnel Junctions

_{0.33}

Sidewall shunted overdamped NbN–MgO–NbN Josephson junctions

MnO

Miniature Hall sensor based ac susceptometer for measurements of vortex and superfluid dynamics in superconducting films

_{3}

Spin filter superconducting tunnel junctions

(LSMO) - YBa

Magnetic exchange hardening in polycrystalline GdN thin films.

_{2}

Superconducting proximity effect in NiBi3-Ni-NiBi3 trilayer system with sharp superconductor-ferromagnet boundaries

Cu