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dc.contributor.author
Llera, María Angela
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dc.contributor.author
Codnia, Jorge
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dc.contributor.author
Jorge, Guillermo Antonio
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dc.date.available
2020-06-19T13:49:45Z
dc.date.issued
2015-02
dc.identifier.citation
Llera, María Angela; Codnia, Jorge; Jorge, Guillermo Antonio; Aggregation dynamics and magnetic properties of magnetic micrometer-sized particles dispersed in a fluid under the action of rotating magnetic fields; Elsevier Science; Journal of Magnetism and Magnetic Materials; 384; 2-2015; 93-100
dc.identifier.issn
0304-8853
dc.identifier.uri
http://hdl.handle.net/11336/107677
dc.description.abstract
We present a dynamic study of soft magnetic, commercial Fe and Ni micrometer-sized particles dispersed in oleic acid and subjected to a variable (rotating) magnetic field in the horizontal plane. A very complex structure is formed after the particles decant towards the bottom liquid?solid interface and the magnetic field is applied for several minutes. The dynamics of structure formation was studied by means of the registration and analysis of microscopic video images, through a Matlab image analysis script. Several parameters, such as the number of clusters, the perimeter-based fractal dimension and circularity, were calculated as a function of time. The time evolution of the number of clusters was found to follow a power-law behavior, with an exponent consistent with that found in other studies for magnetic systems, whereas the typical formation time depends on the particle diameter and field configuration. Complementarily, the magnetic properties of the formed structure were studied, reproducing the experiment with liquid paraffin as the containing fluid, and then letting it solidify. The sample obtained was studied by vibrating sample magnetometry. The magnetization curves show that the material obtained is a planar magnetically anisotropic material, which could eventually be used as an anisotropic magnetic sensor or actuator.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier Science
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Magnetic anisotropy
dc.subject
Magnetic microparticles
dc.subject
Fractal dimensions
dc.subject.classification
Física Atómica, Molecular y Química
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dc.subject.classification
Ciencias Físicas
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
Aggregation dynamics and magnetic properties of magnetic micrometer-sized particles dispersed in a fluid under the action of rotating magnetic fields
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2020-06-18T15:10:27Z
dc.journal.volume
384
dc.journal.pagination
93-100
dc.journal.pais
Países Bajos
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dc.journal.ciudad
Amsterdam
dc.description.fil
Fil: Llera, María Angela. Universidad Nacional de General Sarmiento. Instituto de Ciencias; Argentina
dc.description.fil
Fil: Codnia, Jorge. Universidad Nacional de General Sarmiento. Instituto de Ciencias; Argentina
dc.description.fil
Fil: Jorge, Guillermo Antonio. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de General Sarmiento. Instituto de Ciencias; Argentina
dc.journal.title
Journal of Magnetism and Magnetic Materials
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0304885315001572
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.jmmm.2015.02.025
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