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dc.contributor.author
Riva, Julieta Soledad  
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Pozo Lopez, Gabriela del Valle  
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Condo, Adriana Maria  
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Viqueira, María Soledad  
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Urreta, Silvia Elena  
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Cornejo, Daniel Reinaldo  
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Fabietti, Luis Maria Rodolfo  
dc.date.available
2019-06-24T17:59:41Z  
dc.date.issued
2016-07  
dc.identifier.citation
Riva, Julieta Soledad; Pozo Lopez, Gabriela del Valle; Condo, Adriana Maria; Viqueira, María Soledad; Urreta, Silvia Elena; et al.; Biphasic Fe-Rh nanowires synthesized by AC electrodeposition; Elsevier Science Sa; Journal of Alloys and Compounds; 688; 7-2016; 804-813  
dc.identifier.issn
0925-8388  
dc.identifier.uri
http://hdl.handle.net/11336/78733  
dc.description.abstract
Fe and Fe90Rh10 (nominal) polycrystalline nanowire arrays, 20 nm in diameter and about 1-3 mm in length, are successfully synthesized by AC electrodeposition into the cylindrical pores of anodized aluminum oxide (AAO) nanotemplates. The effects of Rh addition to Fe nanowires on the resulting microstructure, magnetic hysteresis and magnetoresistance properties are explored. As deposited Fe90Rh10 nanowires are biphasic, with large alfa-Fe grains (>100 nm) and clusters of very small (1.7 nm) grains of the ClCs type a´-FeRh phase, with a composition near Fe42Rh58. Hysteresis loops as a function of the sample orientation relative to the external applied field indicate that the easy magnetization axis is parallel to the nanowire long axis at all temperatures. The coercive field decreases with rhodium addition, as expected for an effective uniaxial anisotropy controlled by shape effects; on contrary, the relative remanence (or squareness) slightly increases. The temperature dependence of the coercive field is consistent with a mechanism involving nucleation of inverse domains, with an apparent energy barrier at zero fields between 2.6 and 4.1 eV. Room temperature magnetoresistance in Fe90Rh10 arrays is negative and shows hysteresis at low fields. At low temperature a large hysteresis is observed for fields between the knees in the hysteresis loop, with field ranges of positive and negative magnetoresistance slopes, arising in domain wall nucleation and expansion to complete polarization reversal and in conventional anisotropic magnetoresistance, respectively.  
dc.format
application/pdf  
dc.language.iso
eng  
dc.publisher
Elsevier Science Sa  
dc.rights
info:eu-repo/semantics/openAccess  
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/  
dc.subject
Fe-Rh Polycrystalline Nanowires  
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Ac Electrodeposition  
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Magnetization Mechanism  
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Magnetoresistance  
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Nano-materiales  
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Nanotecnología  
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INGENIERÍAS Y TECNOLOGÍAS  
dc.title
Biphasic Fe-Rh nanowires synthesized by AC electrodeposition  
dc.type
info:eu-repo/semantics/article  
dc.type
info:ar-repo/semantics/artículo  
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info:eu-repo/semantics/publishedVersion  
dc.date.updated
2019-06-11T15:06:45Z  
dc.journal.volume
688  
dc.journal.pagination
804-813  
dc.journal.pais
Países Bajos  
dc.journal.ciudad
Amsterdam  
dc.description.fil
Fil: Riva, Julieta Soledad. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; 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  
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Fil: Condo, Adriana Maria. Comision Nacional de Energia Atomica. Gerencia de Area de Aplicaciones de la Tecnología Nuclear. Gerencia de Tec.nuclear Innovativa (cab); Argentina  
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Fil: Viqueira, María 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  
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Fil: Urreta, Silvia Elena. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina  
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Fil: Cornejo, Daniel Reinaldo. Universidade de Sao Paulo; Brasil  
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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.journal.title
Journal of Alloys and Compounds  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0925838816322058  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://doi.org/10.1016/j.jallcom.2016.07.171