Detection of Current-Induced Resonance of Geometrically Confined Domain Walls | Zendy

Daniel Bedau | Zendy; Mathias Kläui | Zendy; S. Krzyk | Zendy; U. Rüdiger | Zendy; G. Faini | Zendy; L. Vila | Zendy

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Detection of Current-Induced Resonance of Geometrically Confined Domain Walls

Author(s) -

Daniel Bedau,

Mathias Kläui,

S. Krzyk,

U. Rüdiger,

G. Faini,

L. Vila

Publication year - 2007

Publication title -

physical review letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.688

H-Index - 673

eISSN - 1079-7114

pISSN - 0031-9007

DOI - 10.1103/physrevlett.99.146601

Subject(s) - domain wall (magnetism) , quasiparticle , oscillation (cell signaling) , condensed matter physics , resonance (particle physics) , physics , excited state , vortex , current (fluid) , transverse plane , current density , magnetic field , atomic physics , magnetization , mechanics , quantum mechanics , superconductivity , structural engineering , biology , engineering , genetics , thermodynamics

Magnetic domain walls are found to exhibit quasiparticle behavior when subjected to geometrical variations. Because of the spin torque effect such a quasiparticle in a potential well is excited by an ac current leading to a dip in the depinning field at resonance for current densities as low as 2 x 10(10) A/m2. Independently the resonance frequencies of transverse walls and vortex walls are determined from the dc voltage that develops due to a rectifying effect of the resonant domain wall oscillation. The dependence on the injected current density reveals a strongly nonharmonic oscillation.

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