Correlated electronic and magnetic peculiarities of : Charge and spin ordering

Issue		Eur. Phys. J. Appl. Phys. Volume 5, Number 2, February 1999


Page(s)		123 - 126
DOI		10.1051/epjap:1999119

DOI: 10.1051/epjap:1999119

Eur. Phys. J. AP 5, 123-126

Correlated electronic and magnetic peculiarities of $\bf{La_{2}NiO_{4+\delta}}$ : Charge and spin ordering

P. Odier¹ - N. Poirot² - P. Simon² - D. Desousa Meneses²

¹ Laboratoire de Cristallographie, CNRS, B.P. 166, 38042 Grenoble Cedex 9, France
² CRPHT-CNRS 45071 Orléans Cedex 2, France
odier@polycnrs-gre.fr

Received: 14 April 1998 / Accepted: 30 November 1998

Abstract
Electronic and magnetic peculiarities of $\ensuremath{\mathrm{La_{2}NiO} } _{4+\delta}$ are discussed emphasizing charge and spin ordering phenomena. Macroscopic measurements of conductivity (dc, optical) and magnetic susceptibility on samples of well-known oxygen stoichiometries agree to show anomalies where this peculiar ordering is expected. Our data account for the heterogeneous nature of the magnetism. The susceptibility which is quasi temperature independent in a large T range is modeled by a system of spins cluster.

PACS
75.25.+z Spin arrangements in magnetically ordered materials (including neutron and spin-polarized electron studies, synchrotron-source X-ray scattering, etc.) - 78.30.-j Infrared and Raman spectra - 72.90.+y Other topics in electronic transport in condensed matter

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