Proceedings of the International School of Physics "Enrico Fermi.", Volume 70N. Zanichelli, 1978 - Nuclear physics |
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Page 201
... 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 ) ...
... 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 323
vector is along [ 110 ] , the symmetry is broken and the crystal acquires an uni- axial anisotropy axis , [ 110 ] , so that a torque sets in trying to turn this axis parallel to the magnetization . Analogous observation is made if the E ...
vector is along [ 110 ] , the symmetry is broken and the crystal acquires an uni- axial anisotropy axis , [ 110 ] , so that a torque sets in trying to turn this axis parallel to the magnetization . Analogous observation is made if the E ...
Page 329
... vector of the « inducing » radiation , in the case of a ( 110 ) plate of YIG ( 0.08 Si ) at 1.9 K and in a magnetizing field parallel to [ 100 ] : the dependence of the dichroic axis ( a ) ) and of the amplitude ( b ) ) of the linear ...
... vector of the « inducing » radiation , in the case of a ( 110 ) plate of YIG ( 0.08 Si ) at 1.9 K and in a magnetizing field parallel to [ 100 ] : the dependence of the dichroic axis ( a ) ) and of the amplitude ( b ) ) of the linear ...
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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