Local and Global Magnetic properties of Zn{sub}(1-x)Co{sub}xO, ZnCo{sub}2O{sub}4 and Mn-doped GaAs thin films

摘要

Ferromagnetic semiconductors are compounds of great technological interest due to possibility of combining their charge and spin degrees of freedom when producing electronic devices. We report studies of magnetic susceptibility and Electron Spin Resonance (ESR) in different classes of ferromagnetic thin films. Amorphous and crystalline thin films of Mn-doped GaAs and GaN were studied for different Mn concentrations (0.5-10%) and for hydrogenated films with the same Mn concentrations. Also, thin films of Zn{sub}(1-x)Co{sub}xO(x=0.03,0.05,0.10,0.15,0.20) and ZnCo{sub}2O{sub}4 were investigated by these techniques. The films have been deposited using pulsed laser deposition on c-axis (0001) oriented Al{sub}2O{sub}3 substrates.