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Disparate ultrafast...
Disparate ultrafast dynamics of itinerant and localized magnetic moments in gadolinium metal
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- Frietsch, B. (författare)
- Free Univ Berlin, Fachbereich Phys, D-14195 Berlin, Germany.;Max Born Inst, D-12489 Berlin, Germany.
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- Bowlan, J. (författare)
- Free Univ Berlin, Fachbereich Phys, D-14195 Berlin, Germany.;Max Born Inst, D-12489 Berlin, Germany.
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- Carley, R. (författare)
- Free Univ Berlin, Fachbereich Phys, D-14195 Berlin, Germany.;Max Born Inst, D-12489 Berlin, Germany.
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- Teichmann, M. (författare)
- Free Univ Berlin, Fachbereich Phys, D-14195 Berlin, Germany.;Max Born Inst, D-12489 Berlin, Germany.
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- Wienholdt, S. (författare)
- Univ Konstanz, Fachbereich Phys, D-78457 Constance, Germany.
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- Hinzke, D. (författare)
- Univ Konstanz, Fachbereich Phys, D-78457 Constance, Germany.
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- Nowak, U. (författare)
- Univ Konstanz, Fachbereich Phys, D-78457 Constance, Germany.
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- Carva, Karel (författare)
- Uppsala universitet,Materialteori,Charles Univ Prague, Fac Math & Phys, DCMP, CZ-12116 Prague 2, Czech Republic.
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- Oppeneer, Peter M. (författare)
- Uppsala universitet,Materialteori
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- Weinelt, M. (författare)
- Free Univ Berlin, Fachbereich Phys, D-14195 Berlin, Germany.
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Free Univ Berlin, Fachbereich Phys, D-14195 Berlin, Germany;Max Born Inst, D-12489 Berlin, Germany. Univ Konstanz, Fachbereich Phys, D-78457 Constance, Germany. (creator_code:org_t)
- 2015-09-10
- 2015
- Engelska.
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Ingår i: Nature Communications. - : Springer Science and Business Media LLC. - 2041-1723. ; 6
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https://doi.org/10.1...
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https://uu.diva-port... (primary) (Raw object)
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- The Heisenberg-Dirac intra-atomic exchange coupling is responsible for the formation of the atomic spin moment and thus the strongest interaction in magnetism. Therefore, it is generally assumed that intra-atomic exchange leads to a quasi-instantaneous aligning process in the magnetic moment dynamics of spins in separate, on-site atomic orbitals. Following ultrashort optical excitation of gadolinium metal, we concurrently record in photoemission the 4f magnetic linear dichroism and 5d exchange splitting. Their dynamics differ by one order of magnitude, with decay constants of 14 versus 0.8 ps, respectively. Spin dynamics simulations based on an orbital-resolved Heisenberg Hamiltonian combined with first-principles calculations explain the particular dynamics of 5d and 4f spin moments well, and corroborate that the 5d exchange splitting traces closely the 5d spin-moment dynamics. Thus gadolinium shows disparate dynamics of the localized 4f and the itinerant 5d spin moments, demonstrating a breakdown of their intra-atomic exchange alignment on a picosecond timescale.
Ämnesord
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
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Frietsch, B.
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Bowlan, J.
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Carley, R.
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Teichmann, M.
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Wienholdt, S.
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Hinzke, D.
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visa fler...
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Nowak, U.
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Carva, Karel
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Oppeneer, Peter ...
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Weinelt, M.
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