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Correlated electronic and magnetic peculiarities ofLa2NiO4+δ : Charge and spin ordering*

Published online by Cambridge University Press:  15 February 1999

P. Odier ,
N. Poirot ,
P. Simon  and
D. Desousa Meneses
P. Odier
Affiliation:
Laboratoire de Cristallographie, CNRS, B.P. 166, 38042 Grenoble Cedex 9, France
N. Poirot
Affiliation:
CRPHT-CNRS 45071 Orléans Cedex 2, France
P. Simon
Affiliation:
CRPHT-CNRS 45071 Orléans Cedex 2, France
D. Desousa Meneses
Affiliation:
CRPHT-CNRS 45071 Orléans Cedex 2, France
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Abstract

Electronic and magnetic peculiarities of La2NiO4+δ are discussed emphasizingcharge and spin ordering phenomena. Macroscopic measurements of conductivity (dc,optical) and magnetic susceptibility on samples of well-known oxygen stoichiometriesagree to show anomalies where this peculiar ordering is expected. Our data account forthe heterogeneous nature of the magnetism. The susceptibility which is quasitemperature independent in a large T range is modeled by a system of spins cluster.

Keywords

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 5 , Issue 2 , February 1999 , pp. 123 - 126
Copyright
© EDP Sciences, 1999

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