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Evidence for intermediate valence Sm ions in SmBa2Cu3Ox

Authors
Journal
Physica C Superconductivity
0921-4534
Publisher
Elsevier
Publication Date
Identifiers
DOI: 10.1016/0921-4534(91)91633-f
Disciplines
  • Physics

Abstract

Abstract Inelastic neutron scattering experiments have been performed to search for crystalline electric field (CEF) excitations in the high-T c superconductor SmBa 2Cu 3O 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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