Evidence for intermediate valence Sm ions in SmBa2Cu3Ox
1991
Abstract Inelastic neutron scattering experiments have been performed to search for crystalline electric field (CEF) excitations in the high-T c superconductor SmBa 2 Cu 3 O x , however, we failed to detect any CEF transitions up to energy transfers of 100 meV. Instead we observed a behavior of the quasielastic line consistent with the characteristics of intermediate valence compounds, i.e., the line widths exhibit little dependence upon temperature and momentum transfer. A small anomaly of the quasielastic line width was found around T c .
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