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http://hdl.handle.net/10261/117679
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dc.contributor.author | Venero, Alba | - |
dc.contributor.author | Fernández Barquín, L. | - |
dc.contributor.author | Alonso, J. | - |
dc.contributor.author | Fdez-Gubieda, M. L. | - |
dc.contributor.author | Rodríguez Fernández, L. | - |
dc.contributor.author | Boada, R. | - |
dc.contributor.author | Chaboy, Jesús | - |
dc.date.accessioned | 2015-07-07T12:53:59Z | - |
dc.date.available | 2015-07-07T12:53:59Z | - |
dc.date.issued | 2013 | - |
dc.identifier | doi: 10.1088/0953-8984/25/27/276001 | - |
dc.identifier | issn: 0953-8984 | - |
dc.identifier | e-issn: 1361-648X | - |
dc.identifier.citation | Journal of Physics - Condensed Matter 25(27): 276001 (2013) | - |
dc.identifier.uri | http://hdl.handle.net/10261/117679 | - |
dc.description.abstract | Nanogranular thin films of Fe7Au93, Fe7Ag93 and Fe9Cu91 have been sputtered onto Si(100) substrates with the aim of studying the magnetic interactions. X-ray diffraction shows a major noble metal matrix with broad peaks stemming from (111) textured fcc-Au, Ag and Cu. The noble metal forms a nanogranular environment, as confirmed by transmission electron microscopy, with mean particle sizes below 10 nm. The high magnetoresistance (>6%) reveals the existence of Fe nanoparticles. X-ray absorption near edge spectroscopy confirms the presence of a bcc-Fe atom arrangement and some dissolved Fe atoms in the matrix, and XMCD shows the polarization of Au by the Fe nanoparticles. DC-magnetization displays a field-dependent irreversibility produced by the freezing of magnetic nanoparticles into a superspin-glass state. The hysteresis loops remain unsaturated at 5 K and 45 kOe. The coercivity displays a sharp temperature decrease towards a minimum below 50 K, levelling off at higher values, reaching Hc = 200 Oe at 300 K. Annealing of FeAu results in a double-peak zero field cooled magnetization and a slight decrease of the coercivity. The interpretation of the results supports the presence of Fe nanoparticles embedded in the major noble matrix, with some diluted Fe atoms/clusters. | - |
dc.description.sponsorship | We would like to thank Spanish CICYT via supporting project MAT2011-27573-C04. R Boada acknowledges support from the Ministerio de Ciencia e Innovación of Spain. | - |
dc.publisher | Institute of Physics Publishing | - |
dc.rights | closedAccess | - |
dc.title | Magnetic disorder in diluted FexM100-x granular thin films (M=Au, Ag, Cu; x < 10 at.%) | - |
dc.type | artículo | - |
dc.identifier.doi | 10.1088/0953-8984/25/27/276001 | - |
dc.date.updated | 2015-07-07T12:53:59Z | - |
dc.description.version | Peer Reviewed | - |
dc.language.rfc3066 | eng | - |
dc.contributor.funder | Comisión Interministerial de Ciencia y Tecnología, CICYT (España) | - |
dc.contributor.funder | Ministerio de Ciencia e Innovación (España) | - |
dc.relation.csic | Sí | - |
dc.identifier.funder | http://dx.doi.org/10.13039/501100007273 | es_ES |
dc.identifier.funder | http://dx.doi.org/10.13039/501100004837 | es_ES |
dc.type.coar | http://purl.org/coar/resource_type/c_6501 | es_ES |
item.openairetype | artículo | - |
item.grantfulltext | none | - |
item.cerifentitytype | Publications | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.fulltext | No Fulltext | - |
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