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Publication Details

Applicant:
Central University of Tamil Nadu 
Author:
L. Kavitha, E. Parasuraman, D.Gopi and A.Prabhu, Rodrigo A.Vicencio 
Corresponding Authors:
L. Kavitha 
DOI #:
10.1016/j.jmmm.2015.10.021 
Title:
Nonlinear nano-scale localized breather modes in a discrete weak ferromagnetic spin lattice 
Journal:
Journal of Magnetism and Magnetic Materials 
Year:
2016 
Volume:
41 
Page:
394-405 
Keywords:
Soliton, Exchange interactions, Localized modes, Spin dynamics 
Abstract:
We investigate the propagation dynamics of highly localized discrete breather modes in a weak ferromagnetic spin lattice with on-site easy axis anisotropy due to crystal field effect. We derive the discrete nonlinear equation of motion by employing boson mappings and p-representation. We explore the onset of modulational instability both analytically in the framework of linear stability analysis and numerically by means of molecular dynamics (MD) simulations, and a perfect agreement was demonstrated. It is also explored that how the antisymmetric nature of the canted ferromagnetic lattice supports highly localized discrete breather (DBs) modes as shown in the stability/instability windows. The energy exchange between low amplitude discrete breathers favours the growth of higher amplitude DBs, resulting eventually in the formation of few long-lived high amplitude DBs. 
Entered by:
Kavitha Louis on 2020-09-03 
 
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