Rachadi, A. and Hamedoun, M. and El Allam, D. (1996) High-temperature expansion of the correlation function and short-range ordering in a spinel lattice. Physica B: Condensed Matter, 222 (1-3). pp. 160-166.

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Abstract

The short-range ordering in a pure and in a diluted spinel lattice in the paramagnetic phase is studied by the high-temperature series expansion of the zero-field static spin correlation function γi = 〈S0 -Si)/S(S + 1). The first four terms γi are derived using first, second and third nearest-neighbour (n.n) interactions. The results are presented for various neighbour correlations (up to the third). Their behaviour with the temperature and the site dilution is presented. We have compared our theoretical results with experimental data in some chromium spinel compounds having different kinds of spin ordering, namely helimagnetic and ferromagnetic at low temperature. The paramagnetic short-range order is shown to be compatible with the long-range one both for the pure and diluted systems.

Item Type: Article
Uncontrolled Keywords: Chromium compounds; Correlation methods; Functions; High temperature effects; Magnetism; Paramagnetism, Chromium spinel compounds; High temperature expansion; Short range ordering; Spinel lattice; Zero field static spin correlation function, Thermal expansion
Subjects: Engineering
Divisions: SCIENTIFIC PRODUCTION > Engineering
Depositing User: Administrateur Eprints Administrateur Eprints
Last Modified: 31 Jan 2020 15:47
URI: http://eprints.umi.ac.ma/id/eprint/3460

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