2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/21024A phenomenological theory of the incommensurate phase transition in thin films is presented for the case of the single-component order parameter. The order parameter distribution over the film is obtained under the assumption of slowly-varying amplitude. The size effect on the temperature of the phase transition into the incommensurate phase has been considered.Revtex-4, 9 pages, 4 figuresMaterials Sciencetext