Quantum dynamics of tunneling between ferromagnets

Yu-Li Lee, Yu Wen Lee

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

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. We also show that a time-independent uniform magnetic field can serve as the source of the ac spin Josephson effect. That is, the spin current in a uniform magnetic field becomes a periodic function of the time with the period proportional to the inverse of the magnitude of the external magnetic field.

Original languageEnglish
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume68
Issue number18
DOIs
Publication statusPublished - 2003 Nov 18

Fingerprint

Magnetic fields
Ferromagnetic materials
magnetic fields
periodic functions
Josephson effect
symmetry
metals

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

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Quantum dynamics of tunneling between ferromagnets. / Lee, Yu-Li; Lee, Yu Wen.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 68, No. 18, 18.11.2003.

Research output: Contribution to journalArticle

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N2 - 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. We also show that a time-independent uniform magnetic field can serve as the source of the ac spin Josephson effect. That is, the spin current in a uniform magnetic field 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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