Proceedings of the International School of Physics "Enrico Fermi.", Volume 70N. Zanichelli, 1978 - Nuclear physics |
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Page viii
... transformations . 21. Introduction of Bose operators 2'2 . Transformation to spin waves . 2'3 . Diagonalization transformation 3. Spin waves in the garnet multi - sublattice model . . 201 202 203 203 204 204 205 206 207 208 212 4 ...
... transformations . 21. Introduction of Bose operators 2'2 . Transformation to spin waves . 2'3 . Diagonalization transformation 3. Spin waves in the garnet multi - sublattice model . . 201 202 203 203 204 204 205 206 207 208 212 4 ...
Page 208
... transformation . The first term in eq . ( 2.16 ) is in diagonal form , but the last two terms are operators that appear as two crea- tion or two destruction operators for particle k and k . Before introducing the third HP transformation ...
... transformation . The first term in eq . ( 2.16 ) is in diagonal form , but the last two terms are operators that appear as two crea- tion or two destruction operators for particle k and k . Before introducing the third HP transformation ...
Page 217
... transformation converts the spin operators S , to Bose oper- ators by means of the HP transformations ( see eqs ... transformation is a Fourier transformation in the plane of the film 1 ( 4.9 ) ' N Σexp [ ik - j ] bk , VN where N is the ...
... transformation converts the spin operators S , to Bose oper- ators by means of the HP transformations ( see eqs ... transformation is a Fourier transformation in the plane of the film 1 ( 4.9 ) ' N Σexp [ ik - j ] bk , VN where N is the ...
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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