The 38th volume of the Journal of Metastable and Nanocrystalline Materials presents articles that review the crystal structure, morphology, and magnetic properties of various magnetic nanocomposites and nanoparticles, as well as nanoimprint lithography technology for optoelectronics and method of obtaining the porous anodic aluminium oxide used as a template for nanomaterials synthesis. This issue will be helpful to many specialists in applied materials science and nanotechnologies.