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Second‐ and Third‐Order Processes in the Theory of Spin‐Lattice Relaxation
Author(s) -
Shrivastava K. N.
Publication year - 1982
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.2221110107
Subject(s) - condensed matter physics , impurity , paramagnetism , lattice (music) , raman spectroscopy , spin–lattice relaxation , relaxation (psychology) , phonon , ion , materials science , chemistry , physics , quantum mechanics , psychology , social psychology , acoustics
A theory of spin‐lattice relaxation of isolated single paramagnetic ions present as impurities in insulating materials is discussed. A new case of the two‐phonon Raman process with a new temperature dependence of relaxation rate is found, T 1 −1 ∼ T 4 exp (‐Δ/ k B T ). A new third‐order process is also pointed out, which for closely spaced levels leads to a T 3 behavior.
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