Magnetic field influence on mono- and multilayer structures of lanthanide complexes and their mixture with guest molecules, obtained by Langmuir-Blodgett technology, is investigated with using of pi-A isotherms, X-ray and electron diffraction. Obtained results are interpreted in terms of macroscopic biaxial textures, which can be prepared in presence of magnetic field, including in a way some kind of guest-host effect. (C) 2004 Published by Elsevier B.V.