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dc.contributor.author
Riva, Julieta Soledad
dc.contributor.author
Pozo Lopez, Gabriela del Valle
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Condo, Adriana Maria
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Levingston, Jorge Matías
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Fabietti, Luis Maria Rodolfo
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Urreta, Silvia Elena
dc.date.available
2018-11-09T18:07:11Z
dc.date.issued
2017-03-09
dc.identifier.citation
Riva, Julieta Soledad; Pozo Lopez, Gabriela del Valle; Condo, Adriana Maria; Levingston, Jorge Matías; Fabietti, Luis Maria Rodolfo; et al.; Magnetic viscosity in iron-rhodium nanowires; Elsevier Science Sa; Journal of Alloys and Compounds; 709; 9-3-2017; 531-534
dc.identifier.issn
0925-8388
dc.identifier.uri
http://hdl.handle.net/11336/64106
dc.description.abstract
Noble/transition bimetallic nanowires of nominal composition Fe90Rh10 are AC electrodeposited into 20 nm diameter hexagonally self-assembled alumina nanopores. Nanowires about 18 nm in diameter and 1 μm long are polycrystalline and multiphase. Wires contain α-Fe grains and very small grains of the ClCs-type α′-Fe(Rh) phase. The room temperature magnetization mechanism and the thermal stability of nanowire magnetic configurations are further investigated by measuring the dependence of the coercive field on the applied field sweeping rate R. From these data a mean fluctuations field value of μ0HFR = (9.0 ± 0.5) mT is obtained (at coercivity) and an effective activation magnetic moment μac = 5400 μB is estimated, with μB the Bohr magneton. At the coercive field (about 45 mT) the resulting activation lengths become lAC ≈ 6.4 and 6.7 nm for α-Fe and α′-Fe(Rh), respectively. Assuming an effective magnetic anisotropy, considering magnetostatic shape contributions in addition to the magnetocrystalline one, the domain wall thickness δw in α-Fe grains and in the α′-Fe(Rh) become δwFe = 13.4 nm and δwFeRh = 10.9 nm respectively. These values are comparable to the activation lengths estimated at the coercive field in each phase. These facts strongly indicate that irreversible polarization reversal in these nanowires takes place by local curling, involving localized nucleation modes.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier Science Sa
dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Fe-Rh Polycrystalline Nanowires
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Fluctuations Field
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Magnetic Viscosity
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Magnetization Mechanism
dc.subject.classification
Astronomía
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Ciencias Físicas
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CIENCIAS NATURALES Y EXACTAS
dc.title
Magnetic viscosity in iron-rhodium nanowires
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-10-22T18:19:11Z
dc.identifier.eissn
0925-8388
dc.journal.volume
709
dc.journal.pagination
531-534
dc.journal.pais
Países Bajos
dc.journal.ciudad
Amsterdam
dc.description.fil
Fil: Riva, Julieta Soledad. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Física Enrique Gaviola. Universidad Nacional de Córdoba. Instituto de Física Enrique Gaviola; Argentina
dc.description.fil
Fil: Pozo Lopez, Gabriela del Valle. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Física Enrique Gaviola. Universidad Nacional de Córdoba. Instituto de Física Enrique Gaviola; Argentina
dc.description.fil
Fil: Condo, Adriana Maria. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.description.fil
Fil: Levingston, Jorge Matías. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Instituto Nacional de Tecnología Industrial; Argentina. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina
dc.description.fil
Fil: Fabietti, Luis Maria Rodolfo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Física Enrique Gaviola. Universidad Nacional de Córdoba. Instituto de Física Enrique Gaviola; Argentina
dc.description.fil
Fil: Urreta, Silvia Elena. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina
dc.journal.title
Journal of Alloys and Compounds
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0925838817308666
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.jallcom.2017.03.086
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