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Observation of High‐Temperature Heisenberg Ferromagnet Spin Relaxation by EPR
Author(s) -
Cusumano C.,
Troup G. J.
Publication year - 1974
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.2220660103
Subject(s) - ferromagnetism , condensed matter physics , amorphous solid , hyperfine structure , relaxation (psychology) , electron paramagnetic resonance , spin (aerodynamics) , polystyrene , spin glass , heisenberg model , exchange interaction , materials science , physics , chemistry , nuclear magnetic resonance , quantum mechanics , thermodynamics , polymer , crystallography , psychology , social psychology
The previously observed exponential lineshape in the wings of an exchange‐narrowed system, namely solid solution of DPPH in polystyrene, is interpreted as being the result of the spin‐relaxation function of the high‐temperature Heisenberg ferromagnet. This is possible because the exchange frequency was of the same order as the hyperfine width, and because the system is amorphous and disordered.