Soliton-induced magnetic phase transition in three-dimensional systems of weakly coupled magnetic chains with local anisotropy

Thermodynamical properties of weakly coupled magnetic chains, consitituting three-dimensional classical ferromagnets with special exchange and local anisotropies, are considered. The transfer-operator method and pseudospin approach are used. It is shown that the phase transition connected with the disappearance of three-dimensional magnetic ordering is induced here by static kink solitons obtained for one-dimensional systems.