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http://dspace.mediu.edu.my:8181/xmlui/handle/10261/2180| Title: | Magnetic properties of spinel-type oxides NiMn2-xMexO4 |
| Authors: | Fondo Nacional de Desarrollo Científico y Tecnológico (Chile) Région Bretagne |
| Keywords: | Magnetic oxides Spinels Ferrimagnetic properties Magnetic exchange |
| Publisher: | Sociedad Chilena de Química |
| Description: | 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 Authors from Chile and O.P. thank projects Fondecyt-Chile 1020066, 7020066 and 1050178. Authors from France and Brazil thank project CAPES/COFECUB 416/03. Authors from France thank Région Bretagne for financial support Peer reviewed |
| URI: | http://dspace.mediu.edu.my:8181/xmlui/handle/10261/2180 |
| Other Identifiers: | J. Chil. Chem. Soc., 50, N° 3 (2005), págs: 617-623 0717-9707 http://hdl.handle.net/10261/2180 |
| Appears in Collections: | Digital Csic |
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