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|a Nanoscale spin reversal by non-local angular momentum transfer following ultrafast laser excitation in ferrimagnetic GdFeCo
|h [electronic resource]
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|a Washington, D.C. :
|b United States. Department of Energy. Office of Science ;
|a Oak Ridge, Tenn. :
|b distributed by the Office of Scientific and Technical Information, U.S. Department of Energy,
|c 2013.
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|a p. 293-298 :
|b digital, PDF file.
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|a text
|b txt
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|a Published through SciTech Connect.
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|a 03/17/2013.
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|a "slac-pub--15312"
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|a Nature Materials 12 4 ISSN 1476-1122 AM.
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|a C. E. Graves; A. H. Reid; T. Wang; B. Wu; S. de Jong; K. Vahaplar; I. Radu; D. P. Bernstein; M. Messerschmidt; L. Müller; R. Coffee; M. Bionta; S. W. Epp; R. Hartmann; N. Kimmel; G. Hauser; A. Hartmann; P. Holl; H. Gorke; J. H. Mentink; A. Tsukamoto; A. Fognini; J. J. Turner; W. F. Schlotter; D. Rolles; et al.
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|a Ultrafast laser techniques have revealed extraordinary spin dynamics in magnetic materials that equilibrium descriptions of magnetism cannot explain. Particularly important for future applications is understanding non-equilibrium spin dynamics following laser excitation on the nanoscale, yet the limited spatial resolution of optical laser techniques has impeded such nanoscale studies. Here in this paper, we present ultrafast diffraction experiments with an X-ray laser that probes the nanoscale spin dynamics following optical laser excitation in the ferrimagnetic alloy GdFeCo, which exhibits macroscopic all-optical switching. Our study reveals that GdFeCo displays nanoscale chemical and magnetic inhomogeneities that affect the spin dynamics. In particular, we observe Gd spin reversal in Gd-rich nanoregions within the first picosecond driven by the non-local transfer of angular momentum from larger adjacent Fe-rich nanoregions. These results suggest that a magnetic material's microstructure can be engineered to control transient laser-excited spins, potentially allowing faster (̃ 1 ps) spin reversal than in present technologies.
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|b AC02-76SF00515.
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|a Classical And Quantum Mechanics, General Physics.
|2 edbsc.
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|a SLAC National Accelerator Laboratory.
|4 res.
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|a United States.
|b Department of Energy.
|b Office of Science.
|4 spn.
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|a United States.
|b Department of Energy.
|b Office of Scientific and Technical Information.
|4 dst.
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|u http://www.osti.gov/scitech/biblio/1443248
|z Full Text (via OSTI)
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|a .b108029244
|b 10-03-19
|c 10-03-19
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|b 10-03-19
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|a University of Colorado Boulder
|b Online
|c Online
|d Online
|e E 1.99:slac-pub--15312
|h Superintendent of Documents classification
|i web
|n 1
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