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Type: Artigo de periódico
Title: Kinetics Of Ordering In Graphite-sbcl5 Studied By Esr
Author: Rolla S.
Walmsley L.
Suematsu H.
Rettori C.
Yosida Y.
Abstract: Spin-resonance experiments allowed us to study the kinetics of ordering in the quasi-two-dimensional order-disorder phase transition observed at Tc=2102 K in stage-4 SbCl5-intercalated graphite. Quenching from the disordered phase (TTc) reveals a time broadening of the linewidth with a scaling behavior (tn), which we attribute to the time growth of the average linear domain size of a weakly incommensurate superlattice. Fittings of the experimental data give n0.48 for T<Tc and n0.55 for T>Tc, which are close to the exponents obtained in Monte Carlo simulations for domain growth of degenerate superlattices. For TTc a much faster kinetics is observed, which may indicate the presence of critical phenomena. A more sluggish kinetics is observed after an elapsed time of approximately 50 min, and at low temperatures (TTc), the results indicate that the system is in a metastable frozen-in state. © 1987 The American Physical Society.
Rights: aberto
Identifier DOI: 10.1103/PhysRevB.36.2893
Date Issue: 1987
Appears in Collections:Unicamp - Artigos e Outros Documentos

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