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Speed and efficiency of femtosecond spin current injection into a nonmagnetic material

Hofherr, M. (author)
Univ Kaiserslautern, Erwin Schroedinger Str 46, D-67663 Kaiserslautern, Germany.;Grad Sch Mat Sci Mainz, Staudinger Weg 9, D-55128 Mainz, Germany.
Maldonado, Pablo (author)
Uppsala universitet,Materialteori
Schmitt, O. (author)
Univ Kaiserslautern, Erwin Schroedinger Str 46, D-67663 Kaiserslautern, Germany.
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Berritta, Marco (author)
Uppsala universitet,Materialteori
Bierbrauer, U. (author)
Univ Kaiserslautern, Erwin Schroedinger Str 46, D-67663 Kaiserslautern, Germany.
Sadashivaiah, S. (author)
Univ Kaiserslautern, Erwin Schroedinger Str 46, D-67663 Kaiserslautern, Germany.
Schellekens, A. J. (author)
Eindhoven Univ Technol, cNM, Dept Appl Phys, POB 513, NL-5600 MB Eindhoven, Netherlands.
Koopmans, B. (author)
Eindhoven Univ Technol, cNM, Dept Appl Phys, POB 513, NL-5600 MB Eindhoven, Netherlands.
Steil, D. (author)
Georg August Univ Gottingen, Phys Inst 1, Friedrich Hund Pl 1, D-37077 Gottingen, Germany.
Cinchetti, M. (author)
Tech Univ Dortmund, Expt Phys 6, D-44221 Dortmund, Germany.
Stadtmueller, B. (author)
Univ Kaiserslautern, Erwin Schroedinger Str 46, D-67663 Kaiserslautern, Germany.;Grad Sch Mat Sci Mainz, Staudinger Weg 9, D-55128 Mainz, Germany.
Oppeneer, Peter M. (author)
Uppsala universitet,Materialteori
Mathias, S. (author)
Georg August Univ Gottingen, Phys Inst 1, Friedrich Hund Pl 1, D-37077 Gottingen, Germany.;Georg August Univ Gottingen, ICASEC, D-37077 Gottingen, Germany.
Aeschlimann, M. (author)
Univ Kaiserslautern, Erwin Schroedinger Str 46, D-67663 Kaiserslautern, Germany.
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Univ Kaiserslautern, Erwin Schroedinger Str 46, D-67663 Kaiserslautern, Germany;Grad Sch Mat Sci Mainz, Staudinger Weg 9, D-55128 Mainz, Germany. Materialteori (creator_code:org_t)
AMER PHYSICAL SOC, 2017
2017
English.
In: Physical Review B. - : AMER PHYSICAL SOC. - 2469-9950 .- 2469-9969. ; 96:10
Related links:
https://urn.kb.se/re...
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https://doi.org/10.1...
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  • Journal article (peer-reviewed)
Abstract Subject headings
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  • We investigate femtosecond spin injection from an optically excited Ni top layer into an Au bottom layer using time-resolved complex magneto-optical Kerr effect (C-MOKE) measurements. Employing the C-MOKE formalism, we are able to follow layer-resolved demagnetization in Ni and the simultaneous spin injection into the adjacent Au film, both occurring within similar to 40 fs. We confirm the ballistic to diffusive propagation of the spin transfer process with ab initio theory and superdiffusive transport calculations. In particular, our combined experimental-theoretical effort does allow us to quantify the so far elusive amount of spin injection, and therefore the spin injection efficiency at the interface.

Subject headings

NATURVETENSKAP  -- Fysik (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences (hsv//eng)

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ref (subject category)
art (subject category)

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