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Abstract:

We investigated the reversible ferromagnetic (FM) behavior of pure and Co doped CeO 2 nanopowders. The as-sintered samples displayed an increasing paramagnetic contribution upon Co doping. Room temperature FM is obtained simply by performing thermal treatments in vacuum at temperatures as low as 500 °C and it can be switched off by performing thermal treatments in oxidizing conditions. The FM contribution is enhanced as we increase the time of the thermal treatment in vacuum. Those systematic experiments establish a direct relation between ferromagnetism and oxygen vacancies and open a path for developing materials with tailored properties. © 2012 American Institute of Physics.

Registro:

Documento: Artículo
Título:Reversible switching of room temperature ferromagnetism in CeO 2-Co nanoparticles
Autor:Sacanell, J.; Paulin, M.A.; Ferrari, V.; Garbarino, G.; Leyva, A.G.
Filiación:Departamento de Física de la Materia Condensada, Centro Atómico Constituyentes, CNEA, Av. Gral. Paz 1499, Buenos Aires, Argentina
Departamento de Física, FCEN, Universidad de Buenos Aires, Buenos Aires, Argentina
European Synchrotron Radiation Facility, BP 220, F-38043, Grenoble Cedex, France
Escuela de Ciencia y Tecnología, UNSAM, San Martín, Buenos Aires, Argentina
Palabras clave:Co Nanoparticles; Co-doped; Co-doping; In-vacuum; Nano powders; Oxidizing conditions; Paramagnetic contribution; Reversible switching; Room temperature; Room temperature ferromagnetism; Systematic experiment; Tailored properties; Paramagnetism; Sintering; Vacuum; Ferromagnetism
Año:2012
Volumen:100
Número:17
DOI: http://dx.doi.org/10.1063/1.4705045
Título revista:Applied Physics Letters
Título revista abreviado:Appl Phys Lett
ISSN:00036951
CODEN:APPLA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00036951_v100_n17_p_Sacanell

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Citas:

---------- APA ----------
Sacanell, J., Paulin, M.A., Ferrari, V., Garbarino, G. & Leyva, A.G. (2012) . Reversible switching of room temperature ferromagnetism in CeO 2-Co nanoparticles. Applied Physics Letters, 100(17).
http://dx.doi.org/10.1063/1.4705045
---------- CHICAGO ----------
Sacanell, J., Paulin, M.A., Ferrari, V., Garbarino, G., Leyva, A.G. "Reversible switching of room temperature ferromagnetism in CeO 2-Co nanoparticles" . Applied Physics Letters 100, no. 17 (2012).
http://dx.doi.org/10.1063/1.4705045
---------- MLA ----------
Sacanell, J., Paulin, M.A., Ferrari, V., Garbarino, G., Leyva, A.G. "Reversible switching of room temperature ferromagnetism in CeO 2-Co nanoparticles" . Applied Physics Letters, vol. 100, no. 17, 2012.
http://dx.doi.org/10.1063/1.4705045
---------- VANCOUVER ----------
Sacanell, J., Paulin, M.A., Ferrari, V., Garbarino, G., Leyva, A.G. Reversible switching of room temperature ferromagnetism in CeO 2-Co nanoparticles. Appl Phys Lett. 2012;100(17).
http://dx.doi.org/10.1063/1.4705045