This book presents topical research in the study of magnetic thin films, including developments in giant magnetoresistance and tunnelling magnetoresistance based spintronic devices with perpendicular anisotropy; magnetic properties and domain wall propagation of FePt thin films; preparation of thin ferrite films on silicon substrates and dependence of texture of magnetic thin films on different substrates and orientations. Also discussed in this compilation are the properties, preparation and MEMS applications of rare earth magnetic thin films.