Thermal annealing-induced electric dipole relaxation in natural alexandrite

dc.contributorUniversidade Estadual Paulista (Unesp)
dc.contributorUniversidade de São Paulo (USP)
dc.date.accessioned2014-05-20T15:30:10Z
dc.date.accessioned2022-10-05T16:57:42Z
dc.date.available2014-05-20T15:30:10Z
dc.date.available2022-10-05T16:57:42Z
dc.date.created2014-05-20T15:30:10Z
dc.date.issued2005-02-01
dc.identifierPhysics and Chemistry of Minerals. New York: Springer, v. 31, n. 10, p. 733-737, 2005.
dc.identifier0342-1791
dc.identifierhttp://hdl.handle.net/11449/39602
dc.identifier10.1007/s00269-004-0442-7
dc.identifierWOS:000227369900008
dc.identifier0492600439402115
dc.identifier7730719476451232
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/3910681
dc.description.abstractElectrical properties of natural alexandrite (BeAl2O4:Cr3+) are investigated by the thermally stimulated depolarization current (TSDC) technique. Samples are submitted to consecutive annealing processes and TSDC is carried out after each annealing, yielding bands with different parameters. These bands are fitted by a continuous distribution of relaxation parameters: activation energy and pre-exponential factor of the Arrhenius equation. It has been observed that annealing influences the dipole relaxation behavior, since it promotes a modification of Fe3+ and C3+ impurity distributions on sites of distinct symmetry: Al-1 and Al-2. In order to have a reference for comparison, TSDC is also carried out on a synthetic alexandrite sample, where the only impurity present is Cr3+ ion.
dc.languageeng
dc.publisherSpringer
dc.relationPhysics and Chemistry of Minerals
dc.relation1.679
dc.relation0,702
dc.rightsAcesso restrito
dc.sourceWeb of Science
dc.subjectalexandrite
dc.subjectelectrical dipoles
dc.subjectannealing
dc.subjectdepolarization current
dc.titleThermal annealing-induced electric dipole relaxation in natural alexandrite
dc.typeArtigo


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