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The Oxidation State and Magnetic Behaviour of Tb in High-Tc Related Materials

Published online by Cambridge University Press:  22 February 2011

L. Soderholm ,
U. Staub ,
S. Skanthakumar  and
M. R. Antonio
L. Soderholm
Affiliation:
Argonne National Laboratory, Chemistry Division, Argonne, IL 60439
U. Staub
Affiliation:
Argonne National Laboratory, Chemistry Division, Argonne, IL 60439
S. Skanthakumar
Affiliation:
Argonne National Laboratory, Chemistry Division, Argonne, IL 60439
M. R. Antonio
Affiliation:
Argonne National Laboratory, Chemistry Division, Argonne, IL 60439
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Abstract

L3-x-ray absorption spectroscopy is used together with inelastic neutron scattering and magnetic susceptibility measurements to characterize the Tb oxidation state and bonding in the high-Tc related materials Y1-xTbxBa2Cu3O7 and Pb2Sr2TbCu3O8. The Tb is found to be essentially trivalent in both compounds with no indications of significant hybridization. However, there is evidence of significant Tb-Tb magnetic interactions in Pb2Sr2TbCu3O8 that persist to temperatures much higher than the Tb long-range ordering temperature.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 376: Symposium BB – Neutron Scattering in Materials Science , 1994 , 529
Copyright
Copyright © Materials Research Society 1995

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References

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