Proceedings of the International School of Physics "Enrico Fermi.", Volume 70N. Zanichelli, 1978 - Nuclear physics |
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Page 210
... dispersion relation . By substituting for the values of A and B in eq . ( 2.18 ) , the dispersion relation takes the form ( 2.30 ) eff hon = [ ( D + gu H ° * ) ( D * + gụ , H * + gụ , AM sin * 0 ) ] * , where Heff is the internal field ...
... dispersion relation . By substituting for the values of A and B in eq . ( 2.18 ) , the dispersion relation takes the form ( 2.30 ) eff hon = [ ( D + gu H ° * ) ( D * + gụ , H * + gụ , AM sin * 0 ) ] * , where Heff is the internal field ...
Page 219
... dispersion relation and the transformation func- tions u ( t ) . Introducing the solution ( 4.21 ) u1 ( T ) = exp [ itl ] into the set of equations in ( 4.19 ) gives the dispersion relations ( 4.22 ) E ( k , r ) = E ( k , r ' ) = gu ...
... dispersion relation and the transformation func- tions u ( t ) . Introducing the solution ( 4.21 ) u1 ( T ) = exp [ itl ] into the set of equations in ( 4.19 ) gives the dispersion relations ( 4.22 ) E ( k , r ) = E ( k , r ' ) = gu ...
Page 244
... dispersion relation . = Evaluating the second derivatives of the energy allows the dispersion relation to be solved explicitly . For the energy terms considered , Eeq = 0. If we make the transformations ẞ / 2q and a → л / 2 - PH , a ...
... dispersion relation . = Evaluating the second derivatives of the energy allows the dispersion relation to be solved explicitly . For the energy terms considered , Eeq = 0. If we make the transformations ẞ / 2q and a → л / 2 - PH , a ...
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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