Calculations of localized modes on surface and impurity layer embedded in a semi-infinite Heisenberg ferromagnet

2006 ◽  
Vol 321 (10) ◽  
pp. 2271-2285 ◽  
Author(s):  
M. Tamine ◽  
F. Boumeddine
Keyword(s):  
Heisenberg Ferromagnet ◽  
Localized Modes ◽  
Impurity Layer

Effect of Biquadratic Exchange on Two Magnon States of Heisenberg Ferromagnets: Other Neighbor Exchange

1975 ◽  
Vol 53 (6) ◽  
pp. 637-647 ◽  
Author(s):  
D. A. Pink ◽  
Vijay Sachdeva
Keyword(s):  
Ground State ◽  
Nearest Neighbor ◽  
Ferromagnetic State ◽  
Localized States ◽  
Heisenberg Ferromagnet ◽  
Green Functions ◽  
Localized Modes ◽  
One Dimensional ◽  
Localized State ◽  
Biquadratic Exchange

We have investigated the two magnon localized states of a one dimensional Heisenberg ferromagnet the Hamiltonian of which is made up of nearest neighbor and next nearest neighbor isotropic bilinear and biquadratic exchange terms, and a single ion anisotropy term. We have restricted our choice of parameters so that the ground state at T = 0 is the fully aligned ferromagnetic state and we have used the thermodynamic Green functions where the averages have been evaluated in the ground state so that our results are good for [Formula: see text]. We have evaluated the probabilities of finding two spin deviations a distance n apart when the system is in a localized state described by total wave vector q. We have (a) compared the effects of ferromagnetic and antiferromagnetic next nearest neighbor exchange, (b) found that localized modes can lie below or above the two free magnon band depending upon the sign and magnitude of the biquadratic exchange, (c) found that in certain cases two spin deviations appear to behave like objects interacting only via a soft core, and (d) found that modes can have a large single ion component when the single ion anisotropy is zero.

Spin waves in a semi‐infinite Heisenberg ferromagnet with an impurity layer

1990 ◽  
Vol 67 (9) ◽  
pp. 5483-5485 ◽  
Author(s):  
Niu‐Niu Chen ◽  
M. G. Cottam
Keyword(s):  
Spin Waves ◽  
Heisenberg Ferromagnet ◽  
Impurity Layer

scholarly journals Localized modes on an Ablowitz–Ladik nonlinear impurity

2008 ◽  
Vol 372 (42) ◽  
pp. 6388-6391
Author(s):  
Mario I. Molina
Keyword(s):  
Localized Modes

scholarly journals Localized modes on a metasurface through multiwave interactions

2020 ◽  
Vol 4 (6) ◽  
Author(s):  
Martin Lott ◽  
Philippe Roux ◽  
Léonard Seydoux ◽  
Benoit Tallon ◽  
Adrien Pelat ◽  
...  
Keyword(s):  
Localized Modes
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