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dc.contributor.authorBarco, Enrique del, 1968--
dc.contributor.authorDurán, M.-
dc.contributor.authorHernández Ferràs, Joan Manel-
dc.contributor.authorTejada Palacios, Javier-
dc.contributor.authorZysler, R.D.-
dc.contributor.authorVásquez Mansilla, M.-
dc.contributor.authorFiorani, D.-
dc.description.abstractIn this paper we report magnetic relaxation data for antiferromagnetic a-Fe2O3 particles of 5-nm mean diameter in the temperature range 0.1–25 K. The average spin value of these particles S.124 and the uniaxial anisotropy constant D.1.631022 K have been estimated from the experimental values of the blocking temperature and anisotropy field. The observed plateau in the magnetic viscosity from 3 K down to 100 mK agrees with the occurrence of spin tunneling from the ground state SZ5S. However, the scaling M vs T ln(n0t) is broken below 5 K, suggesting the occurrence of tunneling from excited states below this temperature.-
dc.format.extent4 p.-
dc.publisherThe American Physical Societyeng
dc.relation.isformatofReproducció digital del document publicat en format paper, proporcionada per PROLA i
dc.relation.ispartofPhysical Review B, 2002, vol. 65, núm, 5, p. 52404-1-52404-4eng
dc.rights(c) The American Physical Society, 2002eng
dc.subject.classificationRelaxació magnèticacat
dc.subject.classificationPropietats magnètiquescat
dc.subject.otherMagnetic propertieseng
dc.subject.otherMagnetic relaxationeng
dc.titleMagnetic relaxation measurements of (alpha)-Fe2O3 antiferromagnetic particles below 1 Keng
Appears in Collections:Articles publicats en revistes (Física de la Matèria Condensada)

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