Towards the design of contrast-enhanced agents: systematic Ga3+ doping on magnetite nanoparticles Itziar Galarreta, Lourdes Marcano, Idoia Rubio-Castellanos, Izaskun Gil de Muro, Isabel García, Luca Olivi, Maria Luisa Fernandez-Gubieda, Ainara Castellanos-Rubio, Luis Lezama, Idoia Ruiz de Larramendi and Maite Insausti Abstract The main objective of the preparation of the system Fe3-xGaxO4 (0.14 x 1.35) is to further the knowledge of the magnetic response of Ga3+ doped magnetite for the...