by Dallera, C, DeMichelis, B, Puppin, E and Braicovich, L and Brookes, NB
Abstract:
The electronic states of the theta’ phase formed by thermal aging in the Al-Cu (0.5 at. %) alloy are compared with those in C16-CuAl2, which is the final phase separated at equilibrium. This is done by means of Cu L(alpha) fluorescence spectroscopy. The high brilliance of undulator radiation used as an excitation source is exploited. The spectra are taken using the first harmonic of the undulator at 1.7 keV, with a full width half maximum of similar to 250 eV. A narrowing of around 0.5 eV of the Cu L(alpha) spectra in the theta’ phase is found. This is explained in terms of the differences in the Cu Sd-Cu 3d interaction in the two phases and of the hybridization between Cu 3d and the nearly free-electron-like electrons. The results demonstrate the future possibilities of fluorescence spectroscopy of minority species in inhomogeneous systems.
Reference:
Electronic states of the theta’ phase in Cu-Al alloys as compared to C16-CuAl2: Cn L alpha emission excited directly by undulator radiation (Dallera, C, DeMichelis, B, Puppin, E and Braicovich, L and Brookes, NB), In PHYSICAL REVIEW B, AMERICAN PHYSICAL SOC, volume 53, 1996.
Bibtex Entry:
@article{ ISI:A1996TU29000003,
Author = {Dallera, C and DeMichelis, B and Puppin, E and Braicovich, L and
   Brookes, NB},
Title = {{Electronic states of the theta' phase in Cu-Al alloys as compared to
   C16-CuAl2: Cn L alpha emission excited directly by undulator radiation}},
Journal = {{PHYSICAL REVIEW B}},
Year = {{1996}},
Volume = {{53}},
Number = {{3}},
Pages = {{965-968}},
Month = {{JAN 15}},
Abstract = {{The electronic states of the theta' phase formed by thermal aging in the
   Al-Cu (0.5 at. %) alloy are compared with those in C16-CuAl2, which is
   the final phase separated at equilibrium. This is done by means of Cu
   L(alpha) fluorescence spectroscopy. The high brilliance of undulator
   radiation used as an excitation source is exploited. The spectra are
   taken using the first harmonic of the undulator at 1.7 keV, with a full
   width half maximum of similar to 250 eV. A narrowing of around 0.5 eV of
   the Cu L(alpha) spectra in the theta' phase is found. This is explained
   in terms of the differences in the Cu Sd-Cu 3d interaction in the two
   phases and of the hybridization between Cu 3d and the nearly
   free-electron-like electrons. The results demonstrate the future
   possibilities of fluorescence spectroscopy of minority species in
   inhomogeneous systems.}},
Publisher = {{AMERICAN PHYSICAL SOC}},
Address = {{ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA}},
Type = {{Article}},
Language = {{English}},
Affiliation = {{Dallera, C (Corresponding Author), POLITECN MILAN,IST NAZL FIS MAT,PIAZZA LEONARDO DA VINCI 32,I-20133 MILAN,ITALY.
   POLITECN MILAN,DIPARTIMENTO FIS,I-20133 MILAN,ITALY.
   EUROPEAN SYNCHROTRON RADIAT FACIL,F-38043 GRENOBLE,FRANCE.}},
DOI = {{10.1103/PhysRevB.53.965}},
ISSN = {{0163-1829}},
Keywords-Plus = {{AUGER-SPECTRA; SYNCHROTRON-RADIATION; DESIGN; COPPER}},
Research-Areas = {{Materials Science; Physics}},
Web-of-Science-Categories  = {{Materials Science, Multidisciplinary; Physics, Applied; Physics,
   Condensed Matter}},
ResearcherID-Numbers = {{Brookes, Nicholas B/C-6718-2019
   }},
ORCID-Numbers = {{Brookes, Nicholas B/0000-0002-1342-9530
   Braicovich, Lucio/0000-0001-6548-9140}},
Number-of-Cited-References = {{26}},
Times-Cited = {{3}},
Usage-Count-Last-180-days = {{0}},
Usage-Count-Since-2013 = {{1}},
Journal-ISO = {{Phys. Rev. B}},
Doc-Delivery-Number = {{TU290}},
Unique-ID = {{ISI:A1996TU29000003}},
DA = {{2020-12-22}},
}

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