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Lithium Doping in La2CuO4 and La2NiO4

Published online by Cambridge University Press:  15 February 2011

J. L. Sarrao ,
M. E. Torelli  and
Z. Fisk
J. L. Sarrao
Affiliation:
National High Magnetic Field Laboratory, Florida State University, 1800 E. Paul Dirac Dr., Tallahassee, FL 32306
M. E. Torelli
Affiliation:
National High Magnetic Field Laboratory, Florida State University, 1800 E. Paul Dirac Dr., Tallahassee, FL 32306
Z. Fisk
Affiliation:
National High Magnetic Field Laboratory, Florida State University, 1800 E. Paul Dirac Dr., Tallahassee, FL 32306
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Abstract

We have studied the effect of hole doping via Li substitution in La2CuO4 and La2NiO4. The response to hole doping of the Ni (S=1) sublattice is distinct from that of the Cu (S=1/2) sublattice. These effects are seen most clearly for La2Cu0.5Li0.5O4 and La2Ni0.5Li0.5O4 in which the Li ions form an ordered superlattice. It appears that Ni is in a low-spin d7 configuration whereas Cu is in a d9-ligand “Zhang-Rice” configuration. Despite this difference, the response of both La2CuO4 and La2NiO4 to hole doping is surprisingly independent of whether Sr (which substitutes out of plane for La) or Li (which substitutes in the plane for Cu/Ni) is used as the dopant.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 453: Symposium R – Solid State Chemistry of Inorganic Materials , 1996 , 355
Copyright
Copyright © Materials Research Society 1997

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References

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