Thermal and Magnetic Effects in the Optical Spectra of Antiferromagnets |
Common terms and phrases
25 KOe external 2ZJS A₁ absorption agreement antiferromagnetic phase approximation band of RbMnF Bohr magneton Brillouin zone calculations Chapter cm cm-1 cm line cm-1 line crystal field cubic field density of magnon E band E₁ effect electric dipole electronic optical transitions energy separation exchange field exchange interaction exciton external field external magnetic field FeF2 ferromagnetic g-factor ground and excited H₂ Hamiltonian hot band ions lattice line of MnF2 line shift Lorentzian low temperatures magnon density magnon energy magnon scattering magnon sideband observed obtained opposite sublattice order terms order theory parameters phonon pure electronic optical pure electronic transition Raman scattering RbMnF3 renormalization Sharp line structure shift and broadening shown in figure spectra spectrum spin forbidden spin wave splitting sublattice magnons temperature dependence theory Thermal behavior Thermal shift transition of RbMnF transitions in antiferromagnets unit cell values width zero external zone edge magnons ΔΕ