Magnetic properties of spinel-type oxides NiMn2-xMexO4

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Title:	Magnetic properties of spinel-type oxides NiMn2-xMexO4
Authors:	Gautier, J. L.; Moure Jiménez, Carlos CSIC; Bodenez, V.; Cailleaux, X.; Ortiz, Juan; Peña, Octavio; Piriou, B.; Zúñiga, G.; Lisboa-Filho, P. N.
Keywords:	Magnetic oxides Spinels Ferrimagnetic properties Magnetic exchange
Issue Date:	2005
Publisher:	Sociedad Chilena de Química
Citation:	J. Chil. Chem. Soc., 50, N° 3 (2005), págs: 617-623
Abstract:	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
URI:	http://hdl.handle.net/10261/2180
ISSN:	0717-9707
Appears in Collections:	(ICV) Artículos