Proceedings of the International School of Physics "Enrico Fermi.", Volume 70N. Zanichelli, 1978 - Nuclear physics |
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Page 86
... principle . From these conditions , it is expected that the macroscopic free energy can be derived from the averaged microscopic energy expression , which for the strain - free case is given by ( 4.7 ) ∞ +1 Fk ( α ) = Σ Σ x2 ( 0 ) Σ ...
... principle . From these conditions , it is expected that the macroscopic free energy can be derived from the averaged microscopic energy expression , which for the strain - free case is given by ( 4.7 ) ∞ +1 Fk ( α ) = Σ Σ x2 ( 0 ) Σ ...
Page 181
... principle that the time derivative of total canonical momentum ( 2 My ) 7 conjugate to q equals the net force acting ... energy from the drive at the instantaneous rate 2 ( H ̧ — H ̧ ) M¡ ( t ) . At some point the wall structure becomes ...
... principle that the time derivative of total canonical momentum ( 2 My ) 7 conjugate to q equals the net force acting ... energy from the drive at the instantaneous rate 2 ( H ̧ — H ̧ ) M¡ ( t ) . At some point the wall structure becomes ...
Page 345
... principle different , since they are referred to the absorption of the sensing beam , from the o , ( , ) of the ... energy term of a centre of type r . Then the magnetocrystalline energy E associated with the combined nN centres is ( 15 ) ...
... principle different , since they are referred to the absorption of the sensing beam , from the o , ( , ) of the ... energy term of a centre of type r . Then the magnetocrystalline energy E associated with the combined nN centres is ( 15 ) ...
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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