Superspin-glass behavior of Co3[Fe(CN)6]2 Prussian blue nanoparticles confined in mesoporous silica

► We investigate behavior of Co3[Fe(CN)6)]2 coordination polymer nanoparticles. ► These nanoparticles are inserted into MSU-type mesoporous silica. ► The spin-glass behavior was studied as a function of the nanoparticles concentration. ► We study dc and ac vs temperature and frequency measurements, aging and memory effects. ► Nanoparticles exhibit surface spin frustration.