Artículos de revistas
Esr Of Mn2+ In Alcl3-graphite Intercalated Compounds
Registro en:
Physical Review B. , v. 39, n. 13, p. 8816 - 8821, 1989.
1631829
10.1103/PhysRevB.39.8816
2-s2.0-35949013401
Autor
Ceotto G.
Barberis G.E.
Rettori C.
Institución
Resumen
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. 39 13 8816 8821