Magnetic properties of spinel-type oxides NiMn2-xMexO4

Peña O., Moure C., Bodenez V., Cailleaux X., Piriou Bruno, Ortiz J., Zúñiga G., Gautier J.L., Lisboa-Filho P.N.. 2005. Magnetic properties of spinel-type oxides NiMn2-xMexO4. Journal of the Chilean Chemical Society, 50 (3) : 617-623.

Résumé : New materials, based on the well-known spinel compound NiMn2O4, have been synthesized and characterized from the magnetic point of view. The manganese cation was partially substituted in the general formula NiMn2-xMexO4 , by nonmagnetic and magnetic elements, such as Me = Ga, Zn, Ni and Cr (0 x 1). Prior to the determination of their magnetic properties, the non-substituted spinel NiMn2O4 was carefully characterized and studied as a function of the oxygen stoichiometry, based on the influence of the annealing atmosphere and quenching rate. The ferrimagnetic character was observed in all samples, with a paramagnetic-to-ferromagnetic transition temperature Tc stabilized at 110 K, and well defined long-range antiferromagnetic interactions at lower temperatures, which depend on the applied field and the substitute concentration.

Mots-clés libres : Spinel oxide, Magnetic oxides, Magnetic exchange, Ferrimagnetic properties, Spinel

Agences de financement hors UE : Fondo Nacional de Desarrollo Científico y Tecnológico, Région Bretagne

Auteurs et affiliations

• Peña O., Université de Rennes I (FRA) - auteur correspondant
• Moure C., CSIC (ESP)
• Bodenez V., Université de Rennes (FRA)
• Cailleaux X., Université de Rennes I (FRA)
• Piriou Bruno, Université de Rennes I (FRA) ORCID: 0000-0001-5780-3216
• Ortiz J., Universidad de Santiago de Chile (CHL)
• Zúñiga G., Universidad de Santiago de Chile (CHL)
• Gautier J.L., Universidad de Santiago de Chile (CHL)
• Lisboa-Filho P.N., UNESP (BRA)

Source : Cirad-Agritrop (https://agritrop.cirad.fr/611247/)

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