Permalloy thin films obtained by pulsed laser deposition: magnetic and galvanomagnetic behaviour

Results concerning the bulk and surface coercivity as well as Hall voltage of Permalloy (Ni80Fe20) thin films, prepared by pulsed laser deposition, are presented. The samples were tested in as-deposited state as well as after thermal treatment in furnace, at temperatures between 330 deg C-370 deg C, for 30-60 minutes. For the as-deposited samples, the surface coercivity is up to about 14% higher than the bulk one. After thermal treatment, a decrease up to about 54 % of the bulk coercivity and an increase of about four times in the Hall voltage value are obtained.