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High frequency oper...
High frequency operation of a spin-torque oscillator at low field
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- Mohseni, Seyed Majid (author)
- KTH,Materialfysik, MF
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- Sani, Sohrab R. (author)
- KTH,Materialfysik, MF
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Persson, J. (author)
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- Nguyen, T. N. Anh (author)
- KTH,Materialfysik, MF
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- Chung, Sunjae (author)
- KTH,Materialfysik, MF
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Pogoryelov, Ye. (author)
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- Åkerman, Johan (author)
- Gothenburg University,Göteborgs universitet,KTH,Materialfysik, MF,Institutionen för fysik (GU),Department of Physics (GU)
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- Pogoryelov, Yevgen, 1975 (author)
- Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU)
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(creator_code:org_t)
- 2011-10-26
- 2011
- English.
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In: Physica Status Solidi. Rapid Research Letters. - : Wiley. - 1862-6254 .- 1862-6270. ; 5
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Abstract
Subject headings
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- We demonstrate a nano-contact based spin-torque oscillator (STO) combining a high operating frequency with low field operation. The STO is based on an orthogonal spin-valve architecture with an in-plane Co polarizer and an out-of-plane Co/Ni multilayer free layer. High frequency operation at low external fields is achieved by tailoring the Co/Ni layer properties to increase the strength (H(k)) of the perpendicular magnetic anisotropy, while simultaneously reducing the saturation magnetization (M(s)). Our approach emphasizes the importance of mu(0)(H(k)-M(s)) in determining the operating frequency in this system, and suggests that yet higher frequencies should be attainable through further optimization. [GRAPHICS]
Subject headings
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Keyword
- spin-torque oscillators
- perpendicular magnetic anisotropy
- Co/Ni multilayers
- magnetism
- spintronics
- microwave electronics
Publication and Content Type
- ref (subject category)
- art (subject category)
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