Magnetic relaxation in small-particle systems: ln(t/ tau 0) scaling
MetadataShow full item record
Although most of the experimental work dealing with the magnetic relaxation of systems characterized by the existence of an energy-barrier distribution have been analyzed in terms of the so-called logarithmic approximation, this is not a good approximation because obviously it cannot describe the behavior for the whole range of temperatures and times. An alternative method called ln(t/τ0) scaling is proposed. This scaling method allows one to extrapolate the relaxation behavior at times that are experimentally completely unaccessible. From this scaling it is also possible to determine the attempt frequency 1/τ0, and if a certain distribution of energy barriers is assumed the width σ and the mean energy barrier is also obtained. The validity of the logarithmic approximation is critically discussed.
Is part ofPhysical Review B, 1993, vol. 48, núm. 14, p. 10240-10246
European research projects
Showing items related by title, author, creator and subject.
Iglesias, O.; Badia Pascual, Ferran; Labarta, A.; Balcells, Ll. (Elsevier, 1995)An alternative method for analyzing the magnetic relaxation data in small-particle systems based on the T ln(tτ0) scaling is presented. Two experimental systems have been studied using this procedure and the resulting ...
Aghbalou, F.; Badia Pascual, Ferran; Illa i Alibés, Josep (Elsevier, 2006)This paper deals with the exergetic optimization of a solar thermal energy system. This consists of a solar collector (SC) and a rectangular water storage tank (ST) that contains a phase change material (PCM) distributed ...
Viñas Salas, Joan; Badia Pascual, Ferran; Wagensberg Lubinsky, Jorge (Edicions de la Universitat de Lleida, 2010)Recull de les intervencions i lliçons pronunciades en l’acte d'investidura com a doctor Honoris Causa de la Universitat de Lleida a Jorge Wagensberg Lubinski, que va tenir lloc a l'Auditori del Centre de Cultures i ...