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|Type:||Artigo de periódico|
|Title:||The Relaxation Rate Of Europium In Europium Iron Garnet|
|Abstract:||The relaxation rate of europium ions in europium iron garnet (EulG) was estimated by assuming that the crystal field is modulated by optical phonons. Mixing J = 2 states into the J = 0 and J = 1 states by the static rhombic fields breaks the "triangle selection rule" and makes possible this mechanism. It is concluded that the mechanism proposed here can be responsible of the order of magnitude of the line width in the ferrimagnetic resonance of EuIG, but to obtain the observed isotropy of the line width, it is necessary to make rather arbitrary assumptions concerning the dependence of phonon spectral density on frequency. © 1976.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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