Regular Article

Localized spin excitations in a site-dependent antiferromagnetic spin system with D-M interaction

¹ Department of Physics, Soka Ikeda College of Arts and Science for Women, Chennai 600 053, India
² Department of Physics, St. Xavier’s Catholic College of Engineering, Nagercoil 629 001, India
³ Department of Physics, Women’s Christian College, Nagercoil 629 001, India

^a e-mail: lathaisaac@yahoo.com

Received: 3 February 2019
Received in final form: 10 May 2019
Published online: 2 September 2019

Abstract

The existence of localized spin excitations and spin deviations along the site in an inhomogenity induced one-dimensional antiferromagnet (AFM) with Dzyaloshinski-Moriya (D-M) interaction has been studied. A discrete set of coupled nonlinear partial differential equations that governs the dynamics is arrived. The quantum localised spin modes are calculated in the presence of different inhomogenities. The multiple-scale method is employed and multi wave soliton solutions are constructed and depicted graphically.