Proceedings of the International School of Physics "Enrico Fermi.", Volume 70N. Zanichelli, 1978 - Nuclear physics |
From inside the book
Results 1-3 of 17
Page 201
... wave vector k with the values of k deter- mined by the periodic boundary conditions . Each spin i interacts with its two nearest neighbors i + 1 and i 1 through the exchange integral J. By means of the relation ( 1.22 ) - < 9 ; \ H ( 3 ) ...
... wave vector k with the values of k deter- mined by the periodic boundary conditions . Each spin i interacts with its two nearest neighbors i + 1 and i 1 through the exchange integral J. By means of the relation ( 1.22 ) - < 9 ; \ H ( 3 ) ...
Page 479
... waves . Some years ago , this experimental technique could be refined to excite and to observe individual magnons of sharply defined wave vector [ 6 , 7 ] . The first part of this report is dedicated to results obtained by this research ...
... waves . Some years ago , this experimental technique could be refined to excite and to observe individual magnons of sharply defined wave vector [ 6 , 7 ] . The first part of this report is dedicated to results obtained by this research ...
Page 494
... wave vectors are given by ( 14 ) Σπη kphoton where n is the refractive index . Since wine , se , one has ke kine for an optically isotropic material , as shown in fig . 16a ) . In general , the scattering process modifies the ...
... wave vectors are given by ( 14 ) Σπη kphoton where n is the refractive index . Since wine , se , one has ke kine for an optically isotropic material , as shown in fig . 16a ) . In general , the scattering process modifies the ...
Other editions - View all
Common terms and phrases
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