Current-induced microwave excitation of a domain wall confined in a magnetic wire with bi-axial anisotropy

Abstract

We studied the current-induced magnetization dynamics of a domain wall confined in a magnetic wire with bi-axial anisotropy. We showed that above the threshold current density, breathing-mode excitation, where the thickness of the domain wall oscillates, is induced by spin-transfer torque. We found that the breathing-mode can be applied as a source of microwave oscillation because the resistance of the domain wall is a function of the domain wall thickness. In a current sweep simulation, the frequency of the breathing-mode exhibits hysteresis because of the confinement.

arXiv comment5 pages 4 figures

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Cited by in corpus (1)

• Possible method to observe breathing mode of magnetic domain wall in Josephson junction