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Observations of Cef-Split Intermultiplet Transitions in Optically Opaque EuBa2Cu3O7 Using Inelastic Neutron Scattering

Published online by Cambridge University Press:  22 February 2011

U. Staub ,
L. Soderholm ,
R. Osborn ,
E. Balcar  and
V. Trunov
U. Staub
Affiliation:
Argonne National Laboratory, Chemistry Division, Argonne, IL 60439 USA
L. Soderholm
Affiliation:
Argonne National Laboratory, Chemistry Division, Argonne, IL 60439 USA
R. Osborn
Affiliation:
Argonne National Laboratory, Material Sciences Division, Argonne, IL 60439
E. Balcar
Affiliation:
Atominstitut der Oesterriechischen Universitäten, A-1020 Vienna, Austria
V. Trunov
Affiliation:
St. Petersburg Nuclear Physics Institute, Gatchina, St. Petersburg, 188350 Russia
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Abstract

Inelastic neutron scattering (INS) results on the intermultiplet transitions J=0 → 1 and J=1 → 2 in optically opaque EuBa2Cu3O7 are reported. Whereas these multiplets are split by the crystalline electric field (CEF), their low J values are influenced to first order only by the second-order (J=1) and additional fourth-order (J=2) CEF parameters. and the spinorbit coupling parameter were obtained by fitting the splitting of the J=l multiplet and the energy separation between the J=0 and 1 multiplets. The J=0 → 1 splitting observed here is smaller than previously seen by optical spectroscopic studies on a variety of transparent, ionic compounds, necessitating fitting of the free-ion parameter. Additional spectroscopic information on the J=2 multiplet indicates that additional fitting of free ion parameters must be included to adequately model the observed low energy separation between the two lowest J-multiplets. Preliminary calculation on the Q-dependence of the CEF split J=0 → 1 transitions and the comparison with observations are presented.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 376: Symposium BB – Neutron Scattering in Materials Science , 1994 , 535
Copyright
Copyright © Materials Research Society 1995

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References

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