Epitaxial spin-valve structures for ultra-low-field detection
dc.contributor.author | Schuhl, A. | pt_BR |
dc.contributor.author | Durand, Olivier | pt_BR |
dc.contributor.author | Childress, J.R. | pt_BR |
dc.contributor.author | George, Jean-Marie | pt_BR |
dc.contributor.author | Pereira, Luis Gustavo | pt_BR |
dc.date.accessioned | 2014-05-20T02:04:51Z | pt_BR |
dc.date.issued | 1994 | pt_BR |
dc.identifier.issn | 0021-8979 | pt_BR |
dc.identifier.uri | http://hdl.handle.net/10183/95412 | pt_BR |
dc.description.abstract | A new epitaxial “spin-valve”-type system for low-field magnetoresistive detection is described. This system is based on FeiPd epitaxial multilayers grown on (100)MgO by MBE. These films show a very abrupt transition from positive to negative magnetization as the reverse field is applied during hysteresis measurements. We have used these sensitive magnetic properties to fabricate epitaxial spin-valve structures by epitaxial growth of Fe/Ag, Co/Ag, or Co/Cu bilayers on top of a Fe/Pd bilayer. Hysteresis loops and magnetoresistance curves clearly indicate a significant field range with antiparallel alignment of the two components. Magnetoresistive sensitivities of up to 0.3% per Oe at low temperatures have been observed in these structures. The efficiency of the spin-dependent scattering has subsequently been improved either through the addition of planar Co impurities, in both the soft and hard magnetic layer, or by increasing the number of active Fe/Pd interfaces. This approach leads to a drastic improvement of the sensitivity, up to 1.5% per Oersted at room temperature. | en |
dc.format.mimetype | application/pdf | pt_BR |
dc.language.iso | eng | pt_BR |
dc.relation.ispartof | Journal of Applied Physics. Woodbury. Vol. 75, n. 10 (May 1994), p. 7061-7063 | pt_BR |
dc.rights | Open Access | en |
dc.subject | Física da matéria condensada | pt_BR |
dc.subject | Propriedades magnéticas | pt_BR |
dc.subject | Crescimento epitaxial | pt_BR |
dc.subject | Magnetorresistência | pt_BR |
dc.title | Epitaxial spin-valve structures for ultra-low-field detection | pt_BR |
dc.type | Artigo de periódico | pt_BR |
dc.identifier.nrb | 000256598 | pt_BR |
dc.type.origin | Estrangeiro | pt_BR |
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