Figure 3

Room-temperature hysteresis loops measured along the easy and hard magnetisation directions for the following: (a) an anisotropic 4-nm-thick Co film deposited at 54°; (b) an isotropic 4-nm-thick Co film that was normally deposited; (c) a bilayer consisting of two strongly exchange-coupled 4-nm-thick Co layers, where one layer was obliquely deposited at 54° and the other layer was normally deposited; and (d) a trilayer consisting of a 4-nm-thick Co layer deposited at 54°, a 6-nm-thick Ta spacer layer and a 4-nm-thick normally deposited Co layer. Again, the ferromagnetic Co layers are magnetically decoupled due to the effect of the Ta spacer layer. The illustrations shown in Figure2 also correspond to these deposits.