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Frequency Dependednt Losses in YBaCuO Superconductors
Author(s) -
Nag A.,
Joarder R.,
Ghosh B.,
Neogy C.,
Deb S. K.
Publication year - 1991
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221630121
Subject(s) - superconductivity , scandium , condensed matter physics , polaron , relaxation (psychology) , thermal conduction , materials science , doping , range (aeronautics) , low frequency , physics , quantum mechanics , astronomy , metallurgy , composite material , electron , psychology , social psychology
The real and imaginary parts of the frequency dependent response of YBaCuO samples doped with scandium are measured over a wide frequency range (5 Hz to 13 MHz) both, in the normal (at 298 K) and in the superconducting (at 77 K) states. An attempt is made to made to identify the relaxation mechanisms responsible for ac conduction in the samples. It is suggested that 2p hole‐polarons associated with the oxygen atoms play an important role in determining the frequency dependent behaviour in the normal state as well as at their superconductivity.