{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,5]],"date-time":"2025-10-05T12:09:40Z","timestamp":1759666180708,"version":"3.41.2"},"reference-count":41,"publisher":"AIP Publishing","issue":"6","content-domain":{"domain":["pubs.aip.org"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2009,3,15]]},"abstract":"<jats:p>Granular multilayers [Fe(tnm)\u2215MgO(3nm)]N with 0.4nm\u2a7dt\u2a7d1.5nm were prepared by sequential pulsed laser deposition. Transmission electron microscopy (TEM) images show that increasing t causes the growth of the sizes of Fe nanoparticles and broadening of the particle size distribution. For t&amp;gt;0.81nm, continuous Fe layers are formed. The evolution of the shapes and sizes of the particles is reflected in the magnetic properties of the investigated films. A crossover from superparamagnetic to ferromagnetic behavior upon formation of a continuous Fe layer is observed. The fit of zero field cooled and field cooled susceptibility measurements and magnetization curves using Curie\u2013Weiss law and a weighted sum of Langevin functions, respectively, allows the estimation of the average granule size for the films with t&amp;lt;0.61nm. The results of the estimations correlate with the data obtained from TEM images. Reduction of saturation magnetization for Fe nanoparticles and an increase of the coercivity up to 1200Oe at low temperatures were found. It is attributed to the formation of Fe-core\u2215FeOx-shell structured nanocrystals. The oxide shell gives rise to a strong contribution of surface anisotropy. Isotropic tunneling magnetoresistance up to \u223c3% at room temperature and in magnetic field up to 18kOe was found for the film with t=0.61nm. For higher t, an anisotropic magnetoresistance typical for continuous ferromagnetic films was observed.<\/jats:p>","DOI":"10.1063\/1.3093945","type":"journal-article","created":{"date-parts":[[2009,3,20]],"date-time":"2009-03-20T22:57:34Z","timestamp":1237589854000},"update-policy":"https:\/\/doi.org\/10.1063\/aip-crossmark-policy-page","source":"Crossref","is-referenced-by-count":30,"title":["Magnetic properties of Fe\u2215MgO granular multilayers prepared by pulsed laser deposition"],"prefix":"10.1063","volume":"105","author":[{"given":"A.","family":"Garc\u00eda-Garc\u00eda","sequence":"first","affiliation":[{"name":"Universidad de Zaragoza-CSIC 1 Instituto de Ciencia de Materiales de Arag\u00f3n, , 50009-Zaragoza, Spain"},{"name":"Universidad de Zaragoza 2 Departamento de F\u00edsica de la Materia Condensada, , 50009-Zaragoza, Spain"}]},{"given":"A.","family":"Vovk","sequence":"additional","affiliation":[{"name":"Universidad de Zaragoza 3 Instituto de Nanociencia de Arag\u00f3n, , 50009-Zaragoza, Spain"},{"name":"Universidad de Zaragoza 2 Departamento de F\u00edsica de la Materia Condensada, , 50009-Zaragoza, Spain"},{"name":"NAS of Ukraine 4 Institute of Magnetism, , 36-b Vernnadsky Blvd., 03142, Kyiv, Ukraine"}]},{"given":"J. A.","family":"Pardo","sequence":"additional","affiliation":[{"name":"Universidad de Zaragoza 3 Instituto de Nanociencia de Arag\u00f3n, , 50009-Zaragoza, Spain"},{"name":"Universidad de Zaragoza 5 Departamento de Ciencia y Tecnolog\u00eda de Materiales y Fluidos, , 50018-Zaragoza, Spain"}]},{"given":"P.","family":"\u0160trichovanec","sequence":"additional","affiliation":[{"name":"Universidad de Zaragoza 3 Instituto de Nanociencia de Arag\u00f3n, , 50009-Zaragoza, Spain"}]},{"given":"C.","family":"Mag\u00e9n","sequence":"additional","affiliation":[{"name":"Universidad de Zaragoza 3 Instituto de Nanociencia de Arag\u00f3n, , 50009-Zaragoza, Spain"},{"name":"CNRS 6 Centre d\u2019Elaboration de Mat\u00e9riaux et d\u2019Etudes Structurales, , 31055-Toulouse, France"}]},{"given":"E.","family":"Snoeck","sequence":"additional","affiliation":[{"name":"CNRS 6 Centre d\u2019Elaboration de Mat\u00e9riaux et d\u2019Etudes Structurales, , 31055-Toulouse, France"}]},{"given":"P. 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R.","family":"Ibarra","sequence":"additional","affiliation":[{"name":"Universidad de Zaragoza 3 Instituto de Nanociencia de Arag\u00f3n, , 50009-Zaragoza, Spain"},{"name":"Universidad de Zaragoza-CSIC 1 Instituto de Ciencia de Materiales de Arag\u00f3n, , 50009-Zaragoza, Spain"},{"name":"Universidad de Zaragoza 2 Departamento de F\u00edsica de la Materia Condensada, , 50009-Zaragoza, Spain"}]}],"member":"317","published-online":{"date-parts":[[2009,3,20]]},"reference":[{"key":"2023070522163495100_c1","doi-asserted-by":"publisher","first-page":"32","DOI":"10.1016\/j.jmmm.2006.02.005","volume":"304","year":"2006","journal-title":"J. Magn. Magn. Mater."},{"key":"2023070522163495100_c2","doi-asserted-by":"publisher","first-page":"141","DOI":"10.1016\/S0304-8853(96)00490-8","volume":"165","year":"1997","journal-title":"J. Magn. Magn. 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