학술논문
Effects of cobalt-permalloy cosputtering in a nanowire structure on magnetic fluctuation and auto-oscillation.
Document Type
Article
Author
Source
Subject
*MAGNETIC structure
*BRILLOUIN scattering
*SPIN excitations
*LIGHT scattering
*CRITICAL currents
*NANOWIRES
*SPIN waves
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Language
ISSN
2158-3226
Abstract
A magnetic nanostructure for auto-oscillation, induced by spin-transfer torque, is fabricated by cosputtering permalloy with cobalt. Although the system does not meet the critical size and current requirements for direct auto-oscillation, magnetic signals resulting from spin wave excitation and magnetic fluctuations are measured by a Brillouin light scattering (BLS) system. From the analysis of the BLS spectrum, the threshold current for auto-oscillation is estimated to be 27.3% lower in Py1−xCox (x = 0.2095) than in Py1−xCox (x = 0.0). It is surmised that the cobalt in permalloy improves the efficiency of transferring spin toque for auto-oscillation. [ABSTRACT FROM AUTHOR]