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Spin transfer torque driven higher-order propagating spin waves in nano-contact magnetic tunnel junctions

Houshang, Afshin (author)
Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU)
Dumas, Randy K. (author)
Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU)
Fulara, Himanshu (author)
Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU)
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Gangwar, Ajay (author)
Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU)
Haidar, Mohammad (author)
Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU)
Etesami, Seyyed (author)
Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU)
Ferreira, R. (author)
Int Iberian Nanotechnol Lab, P-4715330 Braga, Portugal.
Freitas, P. P. (author)
Int Iberian Nanotechnol Lab, P-4715330 Braga, Portugal.
Dvornik, M. (author)
Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU)
Dumas, R. K. (author)
Univ Gothenburg, Phys Dept, S-41296 Gothenburg, Sweden.
Åkerman, Johan (author)
Gothenburg University,Göteborgs universitet,KTH,Materialfysik, MF,Univ Gothenburg, Phys Dept, S-41296 Gothenburg, Sweden.;NanOsc AB, S-16440 Kista, Sweden.,Institutionen för fysik (GU),Department of Physics (GU)
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 (creator_code:org_t)
2018-10-22
2018
English.
In: Nature Communications. - : NATURE PUBLISHING GROUP. - 2041-1723. ; 9
Related links:
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https://urn.kb.se/re...
https://doi.org/10.1...
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  • Journal article (peer-reviewed)
Abstract Subject headings
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  • Short wavelength exchange-dominated propagating spin waves will enable magnonic devices to operate at higher frequencies and higher data transmission rates. While giant magnetoresistance (GMR)-based magnetic nanocontacts are efficient injectors of propagating spin waves, the generated wavelengths are 2.6 times the nano-contact diameter, and the electrical signal strength remains too weak for applications. Here we demonstrate nano-contact-based spin wave generation in magnetic tunnel junctions and observe large-frequency steps consistent with the hitherto ignored possibility of second-and third-order propagating spin waves with wavelengths of 120 and 74 nm, i.e., much smaller than the 150-nm nanocontact. Mutual synchronization is also observed on all three propagating modes. These higher-order propagating spin waves will enable magnonic devices to operate at much higher frequencies and greatly increase their transmission rates and spin wave propagating lengths, both proportional to the much higher group velocity.

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)

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