Proceedings of the International School of Physics "Enrico Fermi.", Volume 70N. Zanichelli, 1978 - Nuclear physics |
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Page 351
... centres , however properties determined by the symmetry of the states should be ade- quately described . This model can reasonably constitute the basis for a de- tailed explanation of photoinduced anisotropy effects , perhaps on a semi ...
... centres , however properties determined by the symmetry of the states should be ade- quately described . This model can reasonably constitute the basis for a de- tailed explanation of photoinduced anisotropy effects , perhaps on a semi ...
Page 359
... centres . Its expression in the perturbative axial model is obtained from eqs . ( 11 ) and ( 20 ) : ( 29 ) R = kT 3√6 ( A + − A _ ) / ( A + + A_ — 2A 。) · ε - Finally , it should be pointed out that the Fe2 + spectra 4。( 2 ) of fig ...
... centres . Its expression in the perturbative axial model is obtained from eqs . ( 11 ) and ( 20 ) : ( 29 ) R = kT 3√6 ( A + − A _ ) / ( A + + A_ — 2A 。) · ε - Finally , it should be pointed out that the Fe2 + spectra 4。( 2 ) of fig ...
Page 424
... centres ( e.g. donor centres ) are partly unoccupied due to the presence of minority centres ( acceptor centres ) , the charge carriers ( electrons ) may jump from an occupied to a neighbouring unoccupied majority centre . The hopping ...
... centres ( e.g. donor centres ) are partly unoccupied due to the presence of minority centres ( acceptor centres ) , the charge carriers ( electrons ) may jump from an occupied to a neighbouring unoccupied majority centre . The hopping ...
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absorption angle anisotropy constants antiferromagnetic Appl axis birefringence Bloch lines Bloch point bubble calculated cation cm-¹ Co² Co³ coefficient concentration contribution crystal field cubic Curie temperature curve diamagnetic dichroism direction of magnetization domain wall effects electron energy levels equations exchange experimental Fe2+ Fe³ ferrimagnetic ferromagnetic resonance film formula unit frequency GELLER GILLEO given Hamiltonian interaction ion moments Journ K₁ lattice constant line width linear magnetic anisotropy magnetic field magneto-optical magnetoelastic magnons measurements modes neutron diffraction observed obtained octahedral octahedral sites optical orbital oxygen paramagnetic parameters phonons photoinduced photomagnetic Phys polarization polycrystalline properties rare-earth ions rare-earth iron garnets relaxation resonance room temperature rotation sample shown in fig sin² specimens spin wave spin-orbit coupling spontaneous magnetization sublattice substitution surface symmetry temperature dependence tetrahedral theory tion torque transitions uniaxial anisotropy valence values vector velocity yttrium iron garnet