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Type: Artigo de periódico
Title: Esr Of Mn2+ In Alcl3-graphite Intercalated Compounds
Author: Ceotto G.
Barberis G.E.
Rettori C.
Abstract: Electron-spin-resonance experiments of Mn2+ impurities in stage-2 AlCl3-graphite intercalated compounds show the usual conduction-carrier spin resonance and a completely resolved Mn2+ spectrum of axial symmetry with the axial axis perpendicular to the carbon layers. The temperature dependence of the Mn2+ second-order crystal-field parameter and spin-lattice relaxation time are reported. The hyperfine splittings were found to be temperature independent. The observed anomalies in the linewidth of the conduction-carrier spin resonance and the intensity of the Mn2+ resonance at T200 K are interpreted in terms of a quasi-two-dimensional order-disorder phase transition experienced by the intercalant molecules at this temperature. © 1989 The American Physical Society.
Rights: aberto
Identifier DOI: 10.1103/PhysRevB.39.8816
Date Issue: 1989
Appears in Collections:Unicamp - Artigos e Outros Documentos

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