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Antiferromagnetic interaction between two easy‐plane ferromagnetic heisenberg chains
Author(s) -
Diaz V.,
Gutiérrez G.,
Ferrer R.
Publication year - 1994
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221830222
Subject(s) - antiferromagnetism , condensed matter physics , ferromagnetism , heisenberg model , physics , nonlinear system , exchange interaction , lattice (music) , plane (geometry) , quantum mechanics , mathematics , geometry , acoustics
Abstract Nonlinear magnetic excitations in the Heisenberg magnetic system CsNiF 3 , when an antiferromagnetic interchain interaction is present between two neighboring easy‐plane ferromagnetic chains, are studied. Using a two‐lattice model and defining coherent states on each site for the two chains the discrete coupled equation for the averages of the spin components are given. In the easy‐plane limit it is found that three kinds of static magnetic excitations can exist, depending on the value of the antiferromagnetic interchain exchange interaction J 2 . The inclusion of this antiferromagnetic interchain interaction makes the problem of the nonlinear magnetic excitations appear in a new light.