Effects of cobalt-permalloy cosputtering in a nanowire structure on magnetic fluctuation and auto-oscillation
Source abstract
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.
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Research context
OpenAlex topics: Magnetic properties of thin films · Quantum and electron transport phenomena · ZnO doping and properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Materials Science and Engineering, Gwangju Institute of Science and Technology 1 , 123 Cheomdangwagi-ro, Buk-gu, Gwangju 61005, South Korea
Green Energy & Nano Technology R&D Group, Korea Institute of Industrial Technology 2 , 6, Cheomdangwagi-ro 208-gil, Buk-gu, Gwagju 61012, South Korea
Division of Navigation Science, Mokpo National Maritime University 3 , Mokpo 58628, Republic of Korea
Funding
Korea Institute of Industrial Technology · National Research Foundation of Korea · Gwangju Institute of Science and Technology
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