Spin Dynamics of the S = 2 Magnet in a Cubic Crystal Field

1977 ◽  
pp. 94-98
Author(s):  
T. Egami ◽  
M. S. S. Brooks
Keyword(s):  
Crystal Field ◽  
Spin Dynamics ◽  
Cubic Crystal

EPR transitions for ions withS = 3/2 in the presence of small distortions of the cubic crystal field

1983 ◽  
Vol 117 (1) ◽  
pp. 301-311 ◽  
Author(s):  
E. A. Harris ◽  
J. W. Tucker
Keyword(s):  
Crystal Field ◽  
Cubic Crystal

Magnetic Excitations

2020 ◽  
pp. 257-310
Author(s):  
Andrew T. Boothroyd
Keyword(s):  
Crystal Field ◽  
Spin Dynamics ◽  
Random Phase ◽  
Wave Theory ◽  
Quantum Spin ◽  
Dynamical Response ◽  
Magnetic Clusters ◽  
Quantum Spin Chains ◽  
Magnetic Systems ◽  
Scattering Spectrum

In this chapter, the neutron inelastic scattering spectrum is calculated for a variety of magnetic systems. A number of isolated magnetic systems are considered, including single-ion crystal field and intermultiplet excitations, and magnetic clusters. Linear spin-wave theory, a method for calculating the collective spin dynamics in magnetically ordered systems, is outlined and applied to ferromagnets and antiferromagnets both with and without anisptropy. The Random Phase Approximation (RPA) method for the generalized susceptibility is presented and applied to calculate the spectrum of crystal field excitons in praseodymium. The nature of the spin excitations in itinerant magnets is described, and the generalized susceptibility is calculated in the RPA for itinerant electrons with echange correlations. General features of the spin dynamical response in quantum magnets are described, and illustrated by the magnetic spectra of quantum spin chains.

Optical Absorption Spectra and Dynamic Jahn-Teller Effect of V2+ Ions in ZnSe

2008 ◽  
Vol 63 (12) ◽  
pp. 830-838
Author(s):  
Yi-Yang Zhou
Keyword(s):  
Optical Absorption ◽  
Crystal Field ◽  
Absorption Spectra ◽  
Optical Absorption Spectra ◽  
Cubic Crystal ◽  
Racah Parameter ◽  
Jahn Teller ◽  
Jahn Teller Effect ◽  
Tetrahedral Crystal ◽  
Good Agreement

The Hamiltonian matrices for 3d3 ions in a cubic crystal field are introduced, based on a molecular orbital model, including the electronic Coulomb and tetrahedral crystal-field interactions and the spin-orbit coupling. The optical absorption spectra of V2+ ions in ZnSe are studied. Moreover, the various additional levels found close to 5680 cm−1 are considered. These levels are assumed to result from the dynamic Jahn-Teller splitting within the excitation levels 2T2 and 2T1 in ZnSe:V2+. The good agreement between the present results and the experimental observations indicates that the contribution of the covalence reduction factors NE and NT2 and of the Racah parameter A to the optical absorption spectra of V2+ ions in ZnSe is important. However, most of the previous theoretical studies of these spectra in ZnSe:V2+ have neglected the Racah parameter A, based on the classical crystalfield model. A significant charge-transfer effect found in recent works is confirmed in ZnSe:V2+.

Study on the Absorption Spectra of Ga2Se3:Co2+ Single Crystals

2009 ◽  
Vol 64 (12) ◽  
pp. 834-836
Author(s):  
Chao Ni ◽  
Yi Huang ◽  
Maolu Du
Keyword(s):  
Experimental Data ◽  
Fine Structure ◽  
Bond Length ◽  
Single Crystals ◽  
Crystal Field ◽  
Energy Levels ◽  
Crystal Field Parameter ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Cubic Crystal

Introducing the average covalent factor N and considering the interaction of the cubic crystal field, the spin-orbit coupling and Tree’s correction effects, the crystal field parameter Dq was calculated. Also the varying tendency of Dq with the bond length R was investigated. Using the complete diagonalizing method the energy levels of the fine structure of Ga2Se3:Co2+ single crystal were calculated and assigned. The calculated and assigned results are consistent with the experimental data

scholarly journals Magnetic and quadrupolar order in a one-dimensional ferromagnet with cubic crystal-field anisotropy

1999 ◽  
Vol 59 (21) ◽  
pp. 13764-13773 ◽  
Author(s):  
M. Dudziński ◽  
G. Fáth ◽  
J. Sznajd
Keyword(s):  
Crystal Field ◽  
Cubic Crystal ◽  
One Dimensional ◽  
Quadrupolar Order
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