by Braicovich, L, Ghiringhelli, G, Tagliaferri, A, van der Laan, G, Annese, E and Brookes, NB
Abstract:
We present measurements of the magnetic circular dichroism in x-ray resonant emission in the perpendicular geometry (circularly polarized x rays at normal incidence to the magnetization) for the L-2,L-3 absorption region in Fe, Co, and Ni metal. The results show that spin-dependent screening of the core hole takes place within the scattering time scale, which is supported by the absence of the effect in ionic systems. This allows an assessment of the time scale for the screening process (up to a few femtoseconds). The process is almost complete within the scattering time for Fe and Co, but this is not the case for the narrow band metal Ni which shows a much slower dynamics.
Reference:
Femtosecond dynamics in ferromagnetic metals investigated with soft X-ray resonant emission (Braicovich, L, Ghiringhelli, G, Tagliaferri, A, van der Laan, G, Annese, E and Brookes, NB), In PHYSICAL REVIEW LETTERS, AMERICAN PHYSICAL SOC, volume 95, 2005.
Bibtex Entry:
@article{ ISI:000234337900087,
Author = {Braicovich, L and Ghiringhelli, G and Tagliaferri, A and van der Laan, G
   and Annese, E and Brookes, NB},
Title = {{Femtosecond dynamics in ferromagnetic metals investigated with soft
   X-ray resonant emission}},
Journal = {{PHYSICAL REVIEW LETTERS}},
Year = {{2005}},
Volume = {{95}},
Number = {{26}},
Month = {{DEC 31}},
Abstract = {{We present measurements of the magnetic circular dichroism in x-ray
   resonant emission in the perpendicular geometry (circularly polarized x
   rays at normal incidence to the magnetization) for the L-2,L-3
   absorption region in Fe, Co, and Ni metal. The results show that
   spin-dependent screening of the core hole takes place within the
   scattering time scale, which is supported by the absence of the effect
   in ionic systems. This allows an assessment of the time scale for the
   screening process (up to a few femtoseconds). The process is almost
   complete within the scattering time for Fe and Co, but this is not the
   case for the narrow band metal Ni which shows a much slower dynamics.}},
Publisher = {{AMERICAN PHYSICAL SOC}},
Address = {{ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA}},
Type = {{Article}},
Language = {{English}},
Affiliation = {{Braicovich, L (Corresponding Author), Politecn Milan, Dipartimento Fis, INFM, CNR, Piazza Leonardo Vince 32, I-20133 Milan, Italy.
   Politecn Milan, Dipartimento Fis, INFM, CNR, I-20133 Milan, Italy.
   Daresbury Lab, Warrington WA4 4AD, Cheshire, England.
   Univ Modena & Reggio Emilia, INFM, CNR, Dipartimento Fis, Modena, Italy.
   European Synchrotron Radiat Facil, F-38043 Grenoble, France.}},
DOI = {{10.1103/PhysRevLett.95.267402}},
Article-Number = {{267402}},
ISSN = {{0031-9007}},
Keywords-Plus = {{MAGNETIC CIRCULAR-DICHROISM; RAMAN-SCATTERING; PHOTOEMISSION; ITINERANT}},
Research-Areas = {{Physics}},
Web-of-Science-Categories  = {{Physics, Multidisciplinary}},
ResearcherID-Numbers = {{Brookes, Nicholas B/C-6718-2019
   van der Laan, Gerrit/Q-1662-2015
   Ghiringhelli, Giacomo/D-1159-2014
   Tagliaferri, Alberto/L-2903-2015
   Annese, Emilia/AAM-3070-2020
   }},
ORCID-Numbers = {{Brookes, Nicholas B/0000-0002-1342-9530
   van der Laan, Gerrit/0000-0001-6852-2495
   Ghiringhelli, Giacomo/0000-0003-0867-7748
   Tagliaferri, Alberto/0000-0001-8001-1786
   Braicovich, Lucio/0000-0001-6548-9140
   Annese, Emilia/0000-0002-4066-697X}},
Number-of-Cited-References = {{22}},
Times-Cited = {{21}},
Usage-Count-Last-180-days = {{0}},
Usage-Count-Since-2013 = {{6}},
Journal-ISO = {{Phys. Rev. Lett.}},
Doc-Delivery-Number = {{998RV}},
Unique-ID = {{ISI:000234337900087}},
DA = {{2020-12-22}},
}

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