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Electron Paramagnetic Resonance in Me x C 60 Fullerites for Me = K and Rb
Author(s) -
Stankowski J.,
Byszewski P.,
Kempiński W.,
Trybuła Z.,
Żuk T.
Publication year - 1993
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.2221780122
Subject(s) - electron paramagnetic resonance , valency , paramagnetism , ion , fullerene , center (category theory) , materials science , crystallography , nuclear magnetic resonance , chemistry , condensed matter physics , physics , linguistics , philosophy , organic chemistry
EPR studies of superconducting fullerites Me x C 60 (Me = K and Rb) are performed for temperatures ranging from 4 to 300 K and compositions of x = 2 to 5. A paramagnetic center is an ion radical fullerene Ċ 60 which may occur as a cation Ċ 60 + or anion Ċ 60 y − of different valency. The EPR signal of Ċ 60 + weakly depends on temperature whereas the signal of Ċ 60 y − in a Me x (Ċ 60 ) y − complex is strongly dependent both on temperature and composition. A model of a paramagnetic center related to a wandering electron (hole) localized on the Ċ 60 fullerene ball is presented.