Interaction of a Nanomagnet with a Weak Superconducting Link

Abstract

We study electromagnetic interaction of a nanomagnet with a weak superconducting link. Equations that govern coupled dynamics of the two systems are derived and investigated numerically. We show that the presence of a small magnet in the proximity of a weak link may be detected through Shapiro-like steps caused by the precession of the magnetic moment. Despite very weak magnetic field generated by the weak link, a time-dependent bias voltage applied to the link can initiate a non-linear dynamics of the nanomagnet that leads to the reversal of its magnetic moment. We also consider quantum problem in which a nanomagnet interacting with a weak link is treated as a two-state spin system due to quantum tunneling between spin-up and spin-down states.

7 pages, 4 figures

References in corpus (22)

• Proximity effects in superconductor-ferromagnet heterostructures
• Switching of magnetization by non-linear resonance studied in single nanoparticles
• Direct coupling between magnetism and superconducting current in Josephson Phi junction
• Magnetic qubits as hardware for quantum computers
• Magnetic moment manipulation by a Josephson current
• Quantum two-level systems in Josephson junctions as naturally formed qubits
• Superconducting Spin Qubits
• Spin dynamics in a superconductor / ferromagnet proximity system
• Novel Spin Dynamics in a Josephson Junction
• Ferromagnetic Josephson junction with precessing magnetization
• Josephson current through a quantum dot with spin-orbit coupling
• Spin and Spin-Wave Dynamics in Josephson Junctions
• Decoherence of a Josephson qubit due to coupling to two level systems
• Tunneling Spectroscopy of Two-level Systems Inside Josephson Junction
• Controllable pi junction in a Josephson quantum-dot device with molecular spin
• Coupled Superconducting Phase and Ferromagnetic Order Parameter Dynamics
• Josephson Effect through an isotropic magnetic molecule
• Gate-tuned high frequency response of carbon nanotube Josephson junctions
• Rabi oscillations of a qubit coupled to a two-level system
• Optimizing the flux coupling between a nanoSQUID and a magnetic particle using atomic force microscope nanolithography
• Transport and magnetization dynamics in a superconductor/single-molecule magnet/superconductor junction
• Current-phase relation in Josephson junction coupled with a magnetic dot

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• Resistive state of SFS Josephson junctions in the presence of moving domain walls
• Analytical criteria for magnetization reversal in ${\phi }_0$ Josephson junction
• Electrical control of magnetization in S/F/S junctions on a 3D topological insulator
• Quantum Tunneling of the Magnetic Moment in the S/F/S Josephson ${\mathbf{\phi }}_0$-Junction
• Magnetization reversal in S/F/S Josephson junctions on a 3D topological insulator
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• Anomalous Gilbert Damping and Duffing Features of the SFS {\boldmath ${\phi }_0$} Josephson Junction
• Locking of magnetization and Josephson oscillations at ferromagnetic resonance in ${\phi }_0$ junction under external radiation
• Spin-polarized Shapiro steps and spin-precession-assisted multiple Andreev reflection
• Bifurcation structure and chaos in nanomagnet coupled to Josephson junction
• Magnetization induced dynamics of a Josephson junction coupled to a nanomagnet
• Kapitsa pendulum effects in Josephson junction + nanomagnet under external periodic drive
• Manipulating Magnetic Moments by Superconducting Currents
• Nonlinear Dynamics in a Magnetic Josephson Junction
• Magnetic Flux Pumping in Superconducting Loop Containing a Josephson $\psi$ Junction
• Subnanosecond magnetization reversal of magnetic nanoparticle driven by chirp microwave field pulse
• Vortex pinning vs superconducting wire network: origin of periodic oscillations induced by applied magnetic fields in superconducting films with arrays of nanomagnets
• Thermally assisted magnetization reversal of a magnetic nanoparticle driven by a down-chirp microwave field pulse
• Buzdin, Shapiro and Chimera Steps in ${\phi }_0$ Josephson Junctions
• Collective magnetic and plasma excitations in Josephson $\psi$ junctions
• Fast magnetization reversal of a magnetic nanoparticle induced by cosine chirp microwave field pulse
• Resonance phenomena in a nanomagnet coupled to a Josephson junction under external periodic drive
• Superluminal Propagation of Composite Collective Modes in Superconductor-Ferromagnet Heterostructures
• Shape anisotropy effect on magnetization reversal induced by linear down chirp pulse
• Originality of resonance and locking phenomena in SFS ${\phi }_0$ Josephson junction