Synchronized Magnetization Oscillations in F/N/F Nanopillars | Zendy

Kiwamu Kudo | Zendy; Rie Sato | Zendy; Koichi Mizushima | Zendy

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Synchronized Magnetization Oscillations in F/N/F Nanopillars

Author(s) -

Kiwamu Kudo,

Rie Sato,

Koichi Mizushima

Publication year - 2006

Publication title -

japanese journal of applied physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.487

H-Index - 129

eISSN - 1347-4065

pISSN - 0021-4922

DOI - 10.1143/jjap.45.3869

Subject(s) - nanopillar , condensed matter physics , ferromagnetism , magnetization , physics , magnetization dynamics , dynamics (music) , spin (aerodynamics) , torque , current (fluid) , magnetic field , quantum mechanics , nanostructure , acoustics , thermodynamics

Current-induced magnetization dynamics in a trilayer structure composed oftwo ferromagnetic free layers and a nonmagnetic spacer is examined. Both freelayers are treated as a monodomain magnetic body with an uniform agnetization.The dynamics of the two magnetizations is modeled by modifiedLandau-Lifshitz-Gilbert equations with spin-transfer torque terms. By solvingthe equations simultaneously, we discuss their various solutions in detail. Weshow that there exists the synchronous motion of two magnetizations among thevarious solutions; the magnetizations are resonantly coupled via spin-transfertorques and perform precessional motions with the same period. The condition toexcite the synchronous motion depends on the difference between the intrinsicfrequencies of the two ferromagnetic free layers as well as the magnitude ofcurrent.Comment: 7 pages, 13 figures, submitted to Japanese Journal of Applied Physic

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