## Proceedings of the International School of Physics "Enrico Fermi.", Volume 70N. Zanichelli, 1978 - Nuclear physics |

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Page 168

It is interesting to note that the gyrotropic force resembles the Lorentz force on a

charged body moving in a magnetic field, with S playing a role comparable to

...

It is interesting to note that the gyrotropic force resembles the Lorentz force on a

charged body moving in a magnetic field, with S playing a role comparable to

**particle**charge. The gyrotropic force does not depend in the least on the shape of...

Page 200

(1.18) can be expressed in terms of the single-

1.19) 'P = x, x, x, ... 2, . This is the state realized at 0 K and represents the

maximum alignment of spins or complete magnetization. As the temperature

increases, ...

(1.18) can be expressed in terms of the single-

**particle**spin-up eigenstates 2, as (1.19) 'P = x, x, x, ... 2, . This is the state realized at 0 K and represents the

maximum alignment of spins or complete magnetization. As the temperature

increases, ...

Page 208

The first term in eq. (2.16) is in diagonal form, but the last two terms are operators

that appear as two creation or two destruction operators for

Before introducing the third HP transformation to remove these nondiagonal

terms ...

The first term in eq. (2.16) is in diagonal form, but the last two terms are operators

that appear as two creation or two destruction operators for

**particle**k and — k.Before introducing the third HP transformation to remove these nondiagonal

terms ...

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### Contents

Gruppo fotografico dei partecipanti al Corso fuori testo | 1 |

Octahedral sites | 3 |

Hightemperature results | 4 |

Copyright | |

34 other sections not shown

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### Common terms and phrases

absorption angle anisotropy constants anisotropy energy annealing antiferromagnetic Appl axis Bloch lines Bloch point Bloch wall Bloch-line bubble calculated coefficients compensation point contribution Cošt crystal field cubic Curie temperature curve d-site diamagnetic dichroism direction of magnetization domain wall effects electron energy levels equation exchange experimental Fe2+ Fe3+ ions ferromagnetic resonance formula unit frequency gadolinium Gd3+ ion GELLER GILLEo given Hamiltonian interaction ion moments Journ lattice constant line width linear magnetic field magnetic ions magnetoelastic magnetostriction constants measurements neutron diffraction observed octahedral octahedral sites orientation parameter phonons photoinduced photomagnetic Phys plane polarization rare-earth ions rare-earth iron garnets relaxation respectively room temperature rotation sample shown in fig specimens spin wave spontaneous magnetization sublattice substitution symmetry temperature dependence temperature variation tetrahedral theory tion torque transition uniaxial anisotropy valence values vector velocity yttrium iron garnet