Spontaneous supercurrent induced by ferromagnetic pi-junctions

Abstract

We present magnetization measurements of mesoscopic superconducting niobium loops containing a ferromagnetic (PdNi) pi-junction. The loops are prepared on top of the active area of a micro Hall-sensor based on high mobility GaAs/AlGaAs heterostructures. We observe asymmetric switching of the loop between different magnetization states when reversing the sweep direction of the magnetic field. This provides evidence for a spontaneous current induced by the intrinsic phase shift of the pi-junction. In addition, the presence of the spontaneous current near zero applied field is directly revealed by an increase of the magnetic moment with decreasing temperature, which results in half integer flux quantization in the loop at low temperatures.

4 pages, 4 figures

Cited by in corpus (76)

• Proximity effects in superconductor-ferromagnet heterostructures
• Odd Triplet Superconductivity and Related Phenomena in Superconductor-Ferromagnet Structures
• Spin-polarized supercurrents for spintronics: a review of current progress
• Evidence for crossed Andreev reflection in superconductor-ferromagnet hybrid structures
• Ferromagnet-Superconductor Hybrids
• Symmetries of Pairing Correlations in Superconductor-Ferromagnet Nanostructures
• Josephson junctions with negative second harmonic in the current-phase relation: properties of novel varphi-junctions
• 0-pi Josephson tunnel junctions with ferromagnetic barrier
• Superconducting pi qubit with a ferromagnetic Josephson junction
• Theory of the spin-galvanic effect and the anomalous phase-shift ${\phi }_0$ in superconductors and Josephson junctions with intrinsic spin-orbit coupling
• Josephson effect due to the long-range odd-frequency triplet superconductivity in SFS junctions with Neel domain walls
• Critical Current Behavior in Josephson Junctions with the Weak Ferromagnet PdNi
• Static and dynamic properties of 0, pi, and 0-pi ferromagnetic tunnel Josephson Junctions
• Odd spin-triplet superconductivity in a multilayered superconductor-ferromagnet Josephson junction
• Characteristics of strong ferromagnetic Josephson junctions with epitaxial barriers
• Giant thermoelectric effects in a proximity-coupled superconductor-ferromagnet device
• Electronic transport through ferromagnetic and superconducting junctions with spin-filter tunneling barriers
• Superconducting proximity effect in a diffusive ferromagnet with spin-active interfaces
• Bound states at the interface between antiferromagnets and superconductors
• Properties of tunnel Josephson junctions with a ferromagnetic interlayer
• Magnetic interference patterns in 0-Pi SIFS Josephson junctions: effects of asymmetry between 0 and Pi regions
• Odd triplet superconductivity in superconductor-ferromagnet structures with a narrow domain wall
• Oscillations of Induced Magnetization in Superconductor-Ferromagnet Heterostructures
• Resonant proximity effect in normal metal / diffusive ferromagnet / superconductor junctions
• Spin-dependent quasiparticle reflection and bound states at interfaces with itinerant antiferromagnets
• Resonant peak in the density of states in the normal metal / diffusive ferromagnet / superconductor junctions
• Long-range odd triplet superconductivity in SF structures with Neel walls
• Ferromagnetic Materials for Josephson π Junctions
• Superconducting pi qubit with three Josephson junctions
• Interaction of Josephson and magnetic oscillations in Josephson tunnel junctions with a ferromagnetic layer
• Decoherence in a superconducting flux qubit with a pi-junction
• Anti-ferromagnetic ordering in arrays of superconducting pi-rings
• Nematic versus ferromagnetic spin filtering of triplet Cooper pairs in superconducting spintronics
• The role of interface transparency and spin-dependent scattering in diffusive ferromagnet/superconductor heterostructures
• Nonsinusoidal current-phase relation in strongly ferromagnetic and moderately disordered SFS junctions
• Proximity effect-assisted absorption of spin currents in superconductors
• Ferromagnetic 0-pi Junctions as Classical Spins
• Visualizing supercurrents in ferromagnetic Josephson junctions with various arrangements of 0 and πsegments
• Josephson Coupling and Fiske Dynamics in Ferromagnetic Tunnel Junctions
• Current-voltage characteristics of tunnel Josephson junctions with a ferromagnetic interlayer
• Supercurrent reversal in ferromagnetic hybrid nanowire Josephson junctions
• Scattering by magnetic and spin-orbit impurities and the Josephson current in superconductor-ferromagnet-superconductor junctions
• Magnetic anisotropy in ferromagnetic Josephson junctions
• Incomplete Andreev reflection in a clean Superconductor/Ferromagnet/Superconductor junction
• Fine structure of the local pseudogap and Fano effect for superconducting electrons near a zigzag graphene edge
• Alternative mechanism of the sign-reversal effect in superconductor-ferromagnet-superconductor Josephson junctions
• Spin-orbital coupling effect on Josephson current through a superconductor heterojunction
• Competitive 0 and π states in S/F multilayers: multimode approach
• Little-Parks Oscillations in Hybrid Ferromagnet-Superconductor Systems
• Geometric pi Josephson junction in d-wave superconducting thin films
• Role of magnetic scattering in 0-pi transitions in a superconductor/ferromagnetic metal/superconductor junction
• Magnetization induced by odd-frequency spin-triplet Cooper pairs in a Josephson junction with metallic trilayers
• Magnetization Reversal by Tuning Rashba Spin-Orbit Interaction and Josephson Phase in a Ferromagnetic Josephson Junction
• Controllable pi junction with magnetic nanostructures
• Spin-polarized proximity effect in superconducting junctions
• Josephson effect in thin-film superconductor/insulator/superconductor junctions with misaligned in-plane magnetic fields
• Spin-flip scattering and non-ideal interfaces in dirty ferromagnet/superconductor junctions
• Josephson current transport through a Quantum Dot in an Aharonov-Bohm Ring
• Magnetic Flux Pumping in Superconducting Loop Containing a Josephson $\psi$ Junction
• Phase dynamics of ferromagnetic Josephson junctions
• Stationary Josephson effect in a short multi-terminal junction
• Resonant tunneling in short Josephson SFS junctions
• Anomalous current-voltage characteristics of SFIFS Josephson junctions with weak ferromagnetic interlayers
• Theory of quantum-geometric charge and spin Josephson diode effects in strongly spin-polarized hybrid structures with noncoplanar spin textures
• Semifluxons in Superconductivity and Cold Atomic Gases
• Collective magnetic and plasma excitations in Josephson $\psi$ junctions
• The physics of superconductor-ferromagnet hybrid structures
• Superconductor-ferromagnet junction phase qubit
• Chirality and spin transformation of triplet Cooper pairs upon interaction with singlet condensate
• Josephson effect in multi-terminal superconductor-ferromagnet junctions coupled via triplet components
• Sign reversal of ac Josephson current in a ferromagnetic Josephson junction
• Theoretical study of magnetism induced by proximity effect in a ferromagnetic Josephson junction with a normal metal
• Magnetic field-controlled 0-$\pi$ transitions and their experimental signatures in superconductor-ferromagnet-superconductor junctions
• Bistability in superconducting rings containing an inhomogeneous Josephson junction
• Edge currents in frustrated Josephson junction ladders
• DC Josephson effect between two Yu-Shiba-Rusinov bound states