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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Autores principales: Sacanell, Joaquín Gonzalo, Ferrari, Valeria Paola, Garbarino, Gastón Leonel
Publicado: 2012
Materias:
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
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00036951_v100_n17_p_Sacanell
http://hdl.handle.net/20.500.12110/paper_00036951_v100_n17_p_Sacanell
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_00036951_v100_n17_p_Sacanell
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spelling paper:paper_00036951_v100_n17_p_Sacanell2023-06-08T14:24:37Z Reversible switching of room temperature ferromagnetism in CeO 2-Co nanoparticles Sacanell, Joaquín Gonzalo Ferrari, Valeria Paola Garbarino, Gastón Leonel 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 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. Fil:Sacanell, J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Ferrari, V. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Garbarino, G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2012 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00036951_v100_n17_p_Sacanell http://hdl.handle.net/20.500.12110/paper_00036951_v100_n17_p_Sacanell
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic 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
spellingShingle 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
Sacanell, Joaquín Gonzalo
Ferrari, Valeria Paola
Garbarino, Gastón Leonel
Reversible switching of room temperature ferromagnetism in CeO 2-Co nanoparticles
topic_facet 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
description 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.
author Sacanell, Joaquín Gonzalo
Ferrari, Valeria Paola
Garbarino, Gastón Leonel
author_facet Sacanell, Joaquín Gonzalo
Ferrari, Valeria Paola
Garbarino, Gastón Leonel
author_sort Sacanell, Joaquín Gonzalo
title Reversible switching of room temperature ferromagnetism in CeO 2-Co nanoparticles
title_short Reversible switching of room temperature ferromagnetism in CeO 2-Co nanoparticles
title_full Reversible switching of room temperature ferromagnetism in CeO 2-Co nanoparticles
title_fullStr Reversible switching of room temperature ferromagnetism in CeO 2-Co nanoparticles
title_full_unstemmed Reversible switching of room temperature ferromagnetism in CeO 2-Co nanoparticles
title_sort reversible switching of room temperature ferromagnetism in ceo 2-co nanoparticles
publishDate 2012
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00036951_v100_n17_p_Sacanell
http://hdl.handle.net/20.500.12110/paper_00036951_v100_n17_p_Sacanell
work_keys_str_mv AT sacanelljoaquingonzalo reversibleswitchingofroomtemperatureferromagnetisminceo2conanoparticles
AT ferrarivaleriapaola reversibleswitchingofroomtemperatureferromagnetisminceo2conanoparticles
AT garbarinogastonleonel reversibleswitchingofroomtemperatureferromagnetisminceo2conanoparticles
_version_ 1768545905045143552

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