High Temperature Magnetic Properties of Indirect Exchange Spring FePt/M(Cu,C)/Fe Trilayer Thin Films

Figure 6

(Color online) Variations of coercivity with temperature for FePt(30 nm)/M(x nm)/Fe(5 nm) trilayer films with M-Cu (0, 1, 2, and 4) and C (0.25 and 0.5 nm) prepared on Si(111) substrates at ambient temperature and postannealed at 550°C.