Absorption curves 1 Coated sample 1 External stress 1 Ferromagnetic materials 1 Ferromagnetic resonance 1 Ferromagnetism 1 Lows-temperatures 1 Nanoparticles 1 Resonance spectrum Silica 1 Silica shell 1 Sol- gel methods 1 Sol-gel process 1 Sol-gels 1 Synthesis (chemical) 1 Synthesised 1 Temperature 1 Temperature range 1 Thermal expansion 1 Two-materials 1