Quantum dynamics of tunneling between ferromagnets

Details Quantum dynamics of tunneling between ferromagnets Quantum dynamics of tunneling between ferromagnets

2003-06-20

arxiv.org/abs/cond-mat/0306518v2

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Phys. Rev. B 68, 184413 (2003)

Scientific paper

10.1103/PhysRevB.68.184413

We study the Josephson-like spin currents between two ferromagnetic metals by deriving the effective action of the junction. A DC spin Josephson current with the full O(3) symmetry is obtained. By the analogy to the superconducting junctions, we have shown that a time-independent uniform magnetic field can serve as the source of the AC spin Josephson effect. That is, the spin current becomes a periodic function of the time with the period proportional to the inverse of the magnitude of the external magnetic field.

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