Structural and magnetic properties of Fe2-xCoSm xO4 - Nanoparticles and Fe2-xCoSm xO4 - PDMS magnetoelastomers as a function of Sm content
We have synthesized magnetic Fe2-xCoSmxO4 nanoparticles (NPs) by means of the coprecipitation method, varying Sm content from x=0 to x=0.5. Energy-dispersive X-ray spectroscopy showed agreement between the metal proportion of the obtained nanoparticles and the stoichiometric mixture of cations used...
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todo:paper_03048853_v327_n_p11_Ruiz2023-10-03T15:21:08Z Structural and magnetic properties of Fe2-xCoSm xO4 - Nanoparticles and Fe2-xCoSm xO4 - PDMS magnetoelastomers as a function of Sm content Ruiz, M.M. Mietta, J.L. Soledad Antonel, P. Pérez, O.E. Martín Negri, R. Jorge, G. Magnetic composites Magnetic nanoparticles Magnetoelastomers Magnetorheoelastomers Anisotropic composites Coercive field Coprecipitation method Curing process Easy axis Elastic anisotropy Energy dispersive x-ray spectroscopy Heating treatments Inter-particle interaction Magnetic composites Magnetic nanoparticles Magnetic remanence Magnetization measurements Magnetoelastomers Magnetorheoelastomers Micrometric structures Phase segregations Scanning Electron Microscope Stoichiometric mixtures Structural and magnetic properties Young modulus Association reactions Calcination Energy dispersive spectroscopy Magnetic anisotropy Magnetic fields Magnetic moments Magnetization Metal nanoparticles Needles Scanning electron microscopy Silicones Synthesis (chemical) X ray diffraction Nanomagnetics We have synthesized magnetic Fe2-xCoSmxO4 nanoparticles (NPs) by means of the coprecipitation method, varying Sm content from x=0 to x=0.5. Energy-dispersive X-ray spectroscopy showed agreement between the metal proportion of the obtained nanoparticles and the stoichiometric mixture of cations used for the synthesis. Part of the particles were heated at 800 °C, and both were characterized by X-ray diffraction, scanning electron microscope imaging and magnetization measurements. Physical and magnetic properties were analyzed as a function of Sm content, before and after the heating treatment. A phase segregation is found for the calcined nanoparticles with large Sm content. The magnetic remanence, saturation and coercive field were investigated as a function of Sm content for both heated and unheated (as-prepared) particles. Polydimethylsiloxane-NPs magnetoelastomers were prepared and cured under an external uniform magnetic field, obtaining structured anisotropic composites, in which inorganic needles (columnar micrometric structures) oriented in the direction of the magnetic field are formed. Young modulus and remanent magnetic moment were measured and magnetization time relaxation experiments were performed in the directions parallel and perpendicular to the needles in order to determine the magnetic and elastic anisotropy of the composites. The elastic modulus measured parallel to the needles resulted almost twice in magnitude with respect to the perpendicular modulus. The measured magnetic anisotropy of the composites is probably due to the enhanced interparticle interaction within a needle and the freezing of an preferred easy axis distribution among the particles at the curing process. © 2012 Elsevier B.V. Fil:Ruiz, M.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Soledad Antonel, P. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Pérez, O.E. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Martín Negri, R. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Jorge, G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_03048853_v327_n_p11_Ruiz |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Magnetic composites Magnetic nanoparticles Magnetoelastomers Magnetorheoelastomers Anisotropic composites Coercive field Coprecipitation method Curing process Easy axis Elastic anisotropy Energy dispersive x-ray spectroscopy Heating treatments Inter-particle interaction Magnetic composites Magnetic nanoparticles Magnetic remanence Magnetization measurements Magnetoelastomers Magnetorheoelastomers Micrometric structures Phase segregations Scanning Electron Microscope Stoichiometric mixtures Structural and magnetic properties Young modulus Association reactions Calcination Energy dispersive spectroscopy Magnetic anisotropy Magnetic fields Magnetic moments Magnetization Metal nanoparticles Needles Scanning electron microscopy Silicones Synthesis (chemical) X ray diffraction Nanomagnetics |
| spellingShingle |
Magnetic composites Magnetic nanoparticles Magnetoelastomers Magnetorheoelastomers Anisotropic composites Coercive field Coprecipitation method Curing process Easy axis Elastic anisotropy Energy dispersive x-ray spectroscopy Heating treatments Inter-particle interaction Magnetic composites Magnetic nanoparticles Magnetic remanence Magnetization measurements Magnetoelastomers Magnetorheoelastomers Micrometric structures Phase segregations Scanning Electron Microscope Stoichiometric mixtures Structural and magnetic properties Young modulus Association reactions Calcination Energy dispersive spectroscopy Magnetic anisotropy Magnetic fields Magnetic moments Magnetization Metal nanoparticles Needles Scanning electron microscopy Silicones Synthesis (chemical) X ray diffraction Nanomagnetics Ruiz, M.M. Mietta, J.L. Soledad Antonel, P. Pérez, O.E. Martín Negri, R. Jorge, G. Structural and magnetic properties of Fe2-xCoSm xO4 - Nanoparticles and Fe2-xCoSm xO4 - PDMS magnetoelastomers as a function of Sm content |
| topic_facet |
Magnetic composites Magnetic nanoparticles Magnetoelastomers Magnetorheoelastomers Anisotropic composites Coercive field Coprecipitation method Curing process Easy axis Elastic anisotropy Energy dispersive x-ray spectroscopy Heating treatments Inter-particle interaction Magnetic composites Magnetic nanoparticles Magnetic remanence Magnetization measurements Magnetoelastomers Magnetorheoelastomers Micrometric structures Phase segregations Scanning Electron Microscope Stoichiometric mixtures Structural and magnetic properties Young modulus Association reactions Calcination Energy dispersive spectroscopy Magnetic anisotropy Magnetic fields Magnetic moments Magnetization Metal nanoparticles Needles Scanning electron microscopy Silicones Synthesis (chemical) X ray diffraction Nanomagnetics |
| description |
We have synthesized magnetic Fe2-xCoSmxO4 nanoparticles (NPs) by means of the coprecipitation method, varying Sm content from x=0 to x=0.5. Energy-dispersive X-ray spectroscopy showed agreement between the metal proportion of the obtained nanoparticles and the stoichiometric mixture of cations used for the synthesis. Part of the particles were heated at 800 °C, and both were characterized by X-ray diffraction, scanning electron microscope imaging and magnetization measurements. Physical and magnetic properties were analyzed as a function of Sm content, before and after the heating treatment. A phase segregation is found for the calcined nanoparticles with large Sm content. The magnetic remanence, saturation and coercive field were investigated as a function of Sm content for both heated and unheated (as-prepared) particles. Polydimethylsiloxane-NPs magnetoelastomers were prepared and cured under an external uniform magnetic field, obtaining structured anisotropic composites, in which inorganic needles (columnar micrometric structures) oriented in the direction of the magnetic field are formed. Young modulus and remanent magnetic moment were measured and magnetization time relaxation experiments were performed in the directions parallel and perpendicular to the needles in order to determine the magnetic and elastic anisotropy of the composites. The elastic modulus measured parallel to the needles resulted almost twice in magnitude with respect to the perpendicular modulus. The measured magnetic anisotropy of the composites is probably due to the enhanced interparticle interaction within a needle and the freezing of an preferred easy axis distribution among the particles at the curing process. © 2012 Elsevier B.V. |
| format |
JOUR |
| author |
Ruiz, M.M. Mietta, J.L. Soledad Antonel, P. Pérez, O.E. Martín Negri, R. Jorge, G. |
| author_facet |
Ruiz, M.M. Mietta, J.L. Soledad Antonel, P. Pérez, O.E. Martín Negri, R. Jorge, G. |
| author_sort |
Ruiz, M.M. |
| title |
Structural and magnetic properties of Fe2-xCoSm xO4 - Nanoparticles and Fe2-xCoSm xO4 - PDMS magnetoelastomers as a function of Sm content |
| title_short |
Structural and magnetic properties of Fe2-xCoSm xO4 - Nanoparticles and Fe2-xCoSm xO4 - PDMS magnetoelastomers as a function of Sm content |
| title_full |
Structural and magnetic properties of Fe2-xCoSm xO4 - Nanoparticles and Fe2-xCoSm xO4 - PDMS magnetoelastomers as a function of Sm content |
| title_fullStr |
Structural and magnetic properties of Fe2-xCoSm xO4 - Nanoparticles and Fe2-xCoSm xO4 - PDMS magnetoelastomers as a function of Sm content |
| title_full_unstemmed |
Structural and magnetic properties of Fe2-xCoSm xO4 - Nanoparticles and Fe2-xCoSm xO4 - PDMS magnetoelastomers as a function of Sm content |
| title_sort |
structural and magnetic properties of fe2-xcosm xo4 - nanoparticles and fe2-xcosm xo4 - pdms magnetoelastomers as a function of sm content |
| url |
http://hdl.handle.net/20.500.12110/paper_03048853_v327_n_p11_Ruiz |
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