films were measured using vibration samples magnetometer
(VSM) with a maximum applied field of 12 kOe at room
temperature. Figure 4 shows the in-plane magnetization
properties and typical hysteresis loop for all films. The
hysteresis curves indicate that Er0.4Y2.6Fe5O12 films annealed
at 800 to 1000∘C are soft magnetic materials. The saturation
magnetization (