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Electron paramagnetic resonance assessment of the electronic charge of Cu in YBa2Cu3O7−δ

Published online by Cambridge University Press:  31 January 2011

S. Benakki
Affiliation:
L.O.S.C.S., Unité Associée du CNRS No. 232, Université Louis Pasteur, 5, Rue de l'Université, F-67084 Strasbourg, Cedex, France
E. Christoffel
Affiliation:
L.O.S.C.S., Unité Associée du CNRS No. 232, Université Louis Pasteur, 5, Rue de l'Université, F-67084 Strasbourg, Cedex, France
A. Goltzene
Affiliation:
L.O.S.C.S., Unité Associée du CNRS No. 232, Université Louis Pasteur, 5, Rue de l'Université, F-67084 Strasbourg, Cedex, France
B. Meyer
Affiliation:
L.O.S.C.S., Unité Associée du CNRS No. 232, Université Louis Pasteur, 5, Rue de l'Université, F-67084 Strasbourg, Cedex, France
C. Schwab
Affiliation:
L.O.S.C.S., Unité Associée du CNRS No. 232, Université Louis Pasteur, 5, Rue de l'Université, F-67084 Strasbourg, Cedex, France
M. J. Besnus
Affiliation:
L.M.S.E.S., Unité Associée du CNRS No. 306, Université Louis Pasteur, 3, Rue de I'Université, F-67084 Strasbourg, Cedex, France
A. Meyer
Affiliation:
L.M.S.E.S., Unité Associée du CNRS No. 306, Université Louis Pasteur, 3, Rue de I'Université, F-67084 Strasbourg, Cedex, France
S. Vilminot
Affiliation:
I.P.C.M. Strasbourg, 1-4, Rue Blaise Pascal, F-67008 Strasbourg, Cedex, France
M. Drillon
Affiliation:
I.P.C.M. Strasbourg, 1-4, Rue Blaise Pascal, F-67008 Strasbourg, Cedex, France
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Abstract

Electron paramagnetic resonance (EPR) has been measured on powdered YBa2Cu3O7−δ at 9 GHz and at variable temperature 4.2 K ≤ T ≤ 293 K. The decrease of the mean Landé factor value ḡ from 2.22 to 2.07, between T = 4 K and T = Tc, is ascribed to a hole being transferred from copper to oxygen.

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Articles
Copyright
Copyright © Materials Research Society 1987

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References

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Electron paramagnetic resonance assessment of the electronic charge of Cu in YBa2Cu3O7−δ
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