Proceedings of the International School of Physics "Enrico Fermi.", Volume 70N. Zanichelli, 1978 - Nuclear physics |
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Page 62
... symmetry ( 1.3 ) F1 ( a ) = F ( Ra ) . Rrepresents the symmetry group , and for the cubic case R is identical with the crystallographic point group m3m ( 0 ) [ 13 ] and thus contains 48 symmetry elements . Examination of eq . ( 1.2 ) by ...
... symmetry ( 1.3 ) F1 ( a ) = F ( Ra ) . Rrepresents the symmetry group , and for the cubic case R is identical with the crystallographic point group m3m ( 0 ) [ 13 ] and thus contains 48 symmetry elements . Examination of eq . ( 1.2 ) by ...
Page 68
... symmetry considerations . Then the symmetry group R represents axial symmetry , and the free energy can be calculated from eqs . ( 1.2 ) and ( 1.3 ) . If ẞ denotes a unit vector along the uniaxial axis , F ( a , ẞ ) is given by ( 1.9 ) ...
... symmetry considerations . Then the symmetry group R represents axial symmetry , and the free energy can be calculated from eqs . ( 1.2 ) and ( 1.3 ) . If ẞ denotes a unit vector along the uniaxial axis , F ( a , ẞ ) is given by ( 1.9 ) ...
Page 473
... symmetry - dependent terms , whereas E has the same form for tetragonal and trigonal symmetry . Ms Ms = Ms Ms ༔ 3 ) The free energy [ 10 ] of a single 3d " ion f kT In exp [ -Eμg / kT ] · Ms Ms is thus obtained as f2 ( y ) = fox ( y ) + ...
... symmetry - dependent terms , whereas E has the same form for tetragonal and trigonal symmetry . Ms Ms = Ms Ms ༔ 3 ) The free energy [ 10 ] of a single 3d " ion f kT In exp [ -Eμg / kT ] · Ms Ms is thus obtained as f2 ( y ) = fox ( y ) + ...
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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