Narrow Ferromagnetic Resonance Linewidth Polycrystalline Zn-Ferrite Thin Films

Ferromagnetic resonance at 9.5 GHz was performed on ferrimagnetic nano-crystalline Zn-ferrite thin films deposited under different preparation conditions. A very low line width of 40 Oe was observed in as-sputtered 100 W thin films in perpendicular configuration. The pulsed laser deposited films show comparatively higher line widths. This work shows that it is possible to deposit ferrite thin films with low line width and good magnetization values without going through a high temperature processing.