Proceedings of the International School of Physics "Enrico Fermi.", Volume 70N. Zanichelli, 1978 - Nuclear physics |
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Page 71
... Magnetoelastic energy ( magnetostriction ) . The magnetoelastic energy F ( a , ) originates from the interaction of the spin system with the lattice and causes a dependence of the dimensions of magnetic single crystals on the direction ...
... Magnetoelastic energy ( magnetostriction ) . The magnetoelastic energy F ( a , ) originates from the interaction of the spin system with the lattice and causes a dependence of the dimensions of magnetic single crystals on the direction ...
Page 73
... magnetoelastic constants b , via the elastic constants : ( 1.24 ) hi - b C11 C12 h = bi C1 h3 = ხ . Cu + 2012 i = 1 , 4 , i = 2 , 5 , From eqs . ( 1.18 ) and ( 1.22 ) it is obvious that also a volume magnetostriction occurs , and its ...
... magnetoelastic constants b , via the elastic constants : ( 1.24 ) hi - b C11 C12 h = bi C1 h3 = ხ . Cu + 2012 i = 1 , 4 , i = 2 , 5 , From eqs . ( 1.18 ) and ( 1.22 ) it is obvious that also a volume magnetostriction occurs , and its ...
Page 75
... magnetoelastic constants can be calculated from eq . ( 1.28 ) . Unfor- tunately , the elastic constants have not been measured for most rare - earth iron garnets , but the b , can be estimated in good approximation by using the C of ...
... magnetoelastic constants can be calculated from eq . ( 1.28 ) . Unfor- tunately , the elastic constants have not been measured for most rare - earth iron garnets , but the b , can be estimated in good approximation by using the C of ...
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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