Reversible switching of room temperature ferromagnetism in CeO 2-Co nanoparticles

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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...

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Autor principal: Sacanell, J.
Otros Autores: Paulin, M.A, Ferrari, Valeria Paola, Garbarino, G., Leyva, A.G
Formato: Capítulo de libro
Lenguaje:Inglés
Publicado: 2012
Acceso en línea:Registro en Scopus
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Biblioteca Central Dr. Luis F. Leloir (FCEN) de Universidad de Buenos Aires
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100 1 |a Sacanell, J. 
245 1 0 |a Reversible switching of room temperature ferromagnetism in CeO 2-Co nanoparticles 
260 |c 2012 
270 1 0 |m Sacanell, J.; Departamento de Física de la Materia Condensada, Centro Atómico Constituyentes, CNEA, Av. Gral. Paz 1499, Buenos Aires, Argentina; email: sacanell@cnea.gov.ar 
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504 |a http://dx.doi.org/10.1063/1.4705045, E-APPLAB-100-087217 for x-ray data of the samples, Table I, Figure S3, and in the samples in which no impurity was detected, we assumed a concentration of 0.1%, which is the experimental detection limit of our X-ray diffraction experiments (See "XRD resolution"); Cullity, B.D., (1972) Introduction to Magnetic Materials, , (Addison-Wesley) 
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506 |2 openaire  |e Política editorial 
520 3 |a 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.  |l eng 
593 |a Departamento de Física de la Materia Condensada, Centro Atómico Constituyentes, CNEA, Av. Gral. Paz 1499, Buenos Aires, Argentina 
593 |a Departamento de Física, FCEN, Universidad de Buenos Aires, Buenos Aires, Argentina 
593 |a European Synchrotron Radiation Facility, BP 220, F-38043, Grenoble Cedex, France 
593 |a Escuela de Ciencia y Tecnología, UNSAM, San Martín, Buenos Aires, Argentina 
690 1 0 |a CO NANOPARTICLES 
690 1 0 |a CO-DOPED 
690 1 0 |a CO-DOPING 
690 1 0 |a IN-VACUUM 
690 1 0 |a NANO POWDERS 
690 1 0 |a OXIDIZING CONDITIONS 
690 1 0 |a PARAMAGNETIC CONTRIBUTION 
690 1 0 |a REVERSIBLE SWITCHING 
690 1 0 |a ROOM TEMPERATURE 
690 1 0 |a ROOM TEMPERATURE FERROMAGNETISM 
690 1 0 |a SYSTEMATIC EXPERIMENT 
690 1 0 |a TAILORED PROPERTIES 
690 1 0 |a PARAMAGNETISM 
690 1 0 |a SINTERING 
690 1 0 |a VACUUM 
690 1 0 |a FERROMAGNETISM 
700 1 |a Paulin, M.A. 
700 1 |a Ferrari, Valeria Paola 
700 1 |a Garbarino, G. 
700 1 |a Leyva, A.G. 
773 0 |d 2012  |g v. 100  |k n. 17  |p Appl Phys Lett  |x 00036951  |w (AR-BaUEN)CENRE-346  |t Applied Physics Letters 
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