Perpendicular magnetic anisotropy in Co–Pt granular multilayers

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dc.contributor.authorBartolomé, J.
dc.contributor.authorFigueroa, A.I.
dc.contributor.authorGarcía, L.M.
dc.contributor.authorBartolomé, F.
dc.contributor.authorRuiz, L.
dc.contributor.authorGonzález-Calbet, J.M.
dc.contributor.authorPetroff, F.
dc.contributor.authorDeranlot, C.
dc.contributor.authorWilhelm, F.
dc.contributor.authorRogalev, A.
dc.contributor.authorBrookes, N.
dc.date.accessioned2017-05-25T17:02:13Z
dc.date.available2017-05-25T17:02:13Z
dc.date.issued2012
dc.description.abstractMagnetization hysteresis curves have been measured on Co granular multilayers, (Al₂O₃/Co/Pt)N (N = 1 and 25), with the applied magnetic field parallel and perpendicular to the substrate plane. In all samples perpendicular magnetic anisotropy was observed. For Co particles with average diameter 3 nm, the coercive field at low temperature is μ₀HC = 0.5 T. HC decreases for increasing temperature and disappears at ≈200 K. A soft magnetic component is also present in all samples up to the freezing temperature Tf = 365 K. Co and Pt XMCD measurements at the L2,3 edges were performed, yielding to the orbital mL and spin mS contributions to the total magnetic moment of the system. These results, in addition to XANES ones, indicate the presence of CoxPt₁₋x alloy. Particles conformed of CoPt alloy, embedded in Pt and coupled magnetically by dipolar or RKKY interaction, may explain the phenomenology observed in these systems.uk_UA
dc.description.sponsorshipThis work was supported by the MECOM under Grant MAT11/23791 and Project IMANA from the DGA, in Spain. A.I.F. acknowledges a CSIC JAE2008-Predoc grant. The experiment HE3136 at the ESRF is acknowledged.uk_UA
dc.identifier.citationPerpendicular magnetic anisotropy in Co–Pt granular multilayers / J. Bartolomé, A.I. Figueroa, L.M. García, F. Bartolomé, L. Ruiz, J.M. González-Calbet, F. Petroff, C. Deranlot, F. Wilhelm, A. Rogalev, N. Brookes // Физика низких температур. — 2012. — Т. 38, № 9. — С. 1053-1057. — Бібліогр.: 15 назв. — англ.uk_UA
dc.identifier.issn0132-6414
dc.identifier.otherPACS: 75.30.–m, 75.70.–i
dc.identifier.urihttps://nasplib.isofts.kiev.ua/handle/123456789/117613
dc.language.isoenuk_UA
dc.publisherФізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН Україниuk_UA
dc.relation.ispartofФизика низких температур
dc.statuspublished earlieruk_UA
dc.subjectК 80-летию Виктора Валентиновича Еременкоuk_UA
dc.titlePerpendicular magnetic anisotropy in Co–Pt granular multilayersuk_UA
dc.typeArticleuk_UA

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Физика низких температур, 2012, № 09