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Tunable permalloy-b...
Tunable permalloy-based films for magnonic devices
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- Yin, Yuli (author)
- Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU)
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- Pan, Fan (author)
- KTH,Materialfysik, MF,SeRC - Swedish e-Science Research Centre
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- Ahlberg, Martina (author)
- Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU)
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- Ranjbar, Mojtaba (author)
- Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU)
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- Dürrenfeld, Philipp (author)
- Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU)
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- Houshang, Afshin (author)
- Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU)
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- Haidar, Mohammad (author)
- Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU)
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- Bergqvist, Lars (author)
- KTH,Materialfysik, MF,SeRC - Swedish e-Science Research Centre
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Zhai, Ya (author)
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- Dumas, Randy K. (author)
- Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU)
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- Delin, Anna (author)
- Uppsala universitet,KTH,Materialfysik, MF,SeRC - Swedish e-Science Research Centre,Materialteori
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- Åkerman, Johan, 1970 (author)
- Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU),University of Gothenburg, Sweden
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(creator_code:org_t)
- 2015
- 2015
- English.
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In: Physical Review B. - 1098-0121 .- 1550-235X. ; 92:2
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Abstract
Subject headings
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- Using both broadband ferromagnetic resonance (FMR) spectroscopy and ab initio calculations, we study the magnetodynamic properties of permalloy (Py, Ni80Fe20) and Py100-x M-x films with M as platinum (Pt), gold (Au), or silver (Ag). From the uniform FMR mode, we extract the saturation magnetization (M-S), damping (alpha), and inhomogeneous broadening (Delta H-0); from the first perpendicular standing spin-wave (PSSW) mode, we extract the exchange stiffness (A). M-S and A are found to decrease with increasing alloying, most strongly for Au and less so for Pt. On the other hand, alpha increases rapidly with both Pt and Au content, while being virtually independent of Ag content. The physical origins of the observed trends in alpha, M-S, and A are analyzed and explained using density functional theory calculations in the coherent potential approximation. The calculated trends quantitatively agree with the experimental observations. The drastically different impacts of Pt, Au, and Ag on the various fundamental magnetodynamic properties will allow for significant design freedom, where different properties can be varied independently of others through careful combinations of the Pt, Au, and Ag contents of Py100-x M-x films. By empirical approximations of each property's concentration dependence, we can dial in any desired combination of magnetodynamic properties within this parameter space. As a proof-of-principle demonstration we design a set of Py100-x-yPtxAgy films, where the saturation magnetization stays constant throughout the set and the damping can be tuned by a factor of 4.
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
- MAGNETIC DROPLET SOLITONS
- FERROMAGNETIC-FILMS
- ANISOTROPIC MAGNETORESISTANCE
- NANO-OSCILLATORS
- WAVES
- DRIVEN
- MULTILAYERS
- ALLOYS
- SPECTROSCOPY
- Physics
- Condensed Matter
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Yin, Yuli
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Pan, Fan
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Ahlberg, Martina
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Ranjbar, Mojtaba
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Dürrenfeld, Phil ...
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Houshang, Afshin
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show more...
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Haidar, Mohammad
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Bergqvist, Lars
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Zhai, Ya
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Dumas, Randy K.
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Delin, Anna
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Åkerman, Johan, ...
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Condensed Matter ...
- Articles in the publication
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Physical Review ...
- By the university
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University of Gothenburg
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Royal Institute of Technology
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Uppsala University