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|Type:||Artigo de periódico|
|Title:||Conduction Electron Spin Resonance Evidence For Internal Field In Graphite|
Ricardo Da Silva R.
|Abstract:||We report conduction electron spin resonance measurements performed on highly oriented pyrolitic graphite samples between 10 and 300K using S (ν = 4GHz), X (ν = 9.4GHz), and Q (ν = 34.4GHz) microwave bands for the external DC-magnetic field applied parallel (H ∥ c) and perpendicular (H ⊥c ) to the sample hexagonal c-axis. The results obtained in the H ∥ c geometry are interpreted in terms of the presence of an effective internal ferromagnetic-like field, H int eff(T, H), that increases as the temperature decreases and the applied DC-magnetic field increases. We associate the occurrence of the H int eff(T, H) with the field-induced metal-insulator transition in graphite and discuss its origin in the light of relevant theoretical models. © 2002 Elsevier Science B.V. All rights reserved.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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