Proceedings of the International School of Physics "Enrico Fermi.", Volume 70N. Zanichelli, 1978 - Nuclear physics |
From inside the book
Results 1-3 of 22
Page 206
... operator . - 21. Introduction of Bose operators . Bose creation and annihilation oper- ators [ 26 ] working on the eigenstates of the spin deviation operators can be introduced , ( 2.6 ) a † Pm , = ( n ̧ + 1 ) 1 Pm + 1 αΦ and ni a ̧ Þ11 ...
... operator . - 21. Introduction of Bose operators . Bose creation and annihilation oper- ators [ 26 ] working on the eigenstates of the spin deviation operators can be introduced , ( 2.6 ) a † Pm , = ( n ̧ + 1 ) 1 Pm + 1 αΦ and ni a ̧ Þ11 ...
Page 207
... operators are also Bose operators and the eigenvalues of the operators are the number of spin waves n having wave vector k . When this transformation is inserted into H , a typical term becomes HP ' ( 2.14 ) 28 Σ Β , α , α , ij 1 2N Σου ...
... operators are also Bose operators and the eigenvalues of the operators are the number of spin waves n having wave vector k . When this transformation is inserted into H , a typical term becomes HP ' ( 2.14 ) 28 Σ Β , α , α , ij 1 2N Σου ...
Page 217
... operators S , to Bose oper- ators by means of the HP transformations ( see eqs . ( 2.7 ) and ( 2.8 ) ) ( 4.7 ) = √28a ,,, S = √28a , SS - aja , where a , and a ,, are the creation and annihilation operators of the spin devia- tions ...
... operators S , to Bose oper- ators by means of the HP transformations ( see eqs . ( 2.7 ) and ( 2.8 ) ) ( 4.7 ) = √28a ,,, S = √28a , SS - aja , where a , and a ,, are the creation and annihilation operators of the spin devia- tions ...
Other editions - View all
Common terms and phrases
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