Fig. 3
From: Metallic ferromagnetic films with magnetic damping under 1.4 × 10−3
Determination of in-plane magnetic hard axis. a Schematic illustration of the epitaxial relationship between the Co25Fe75 lattice and the MgO and MAO(001) substrates as well as the in-plane field angle ϕ H with respect to the Co25Fe75 [100] axis. In-plane magnetic hysteresis loops for the b Cr(2.8 nm)/Co25Fe75(6.8 nm)/MgO(001) and c Cr(2.8 nm)/Co25Fe75(6.8 nm)/MAO(001) sample for field applied along a Co25Fe75 [100] axis (ϕ H = 0°, easy axis) and a Co25Fe75 [110] axis (ϕ H = 45°, hard axis). A saturation magnetization of 2.46 and 2.34 T as well as an easy-axis coercive field of 20 and 2.5 Oe are obtained for the 6.8 nm Co25Fe75 film on MgO and MAO, respectively. The insets in b and c show a zoom-in view of the hard-axes hysteresis loops (ϕ H = 45°) to extract the in-plane magnetocrystalline anisotropy, H 4|| = 260 and 295 Oe, for the Co25Fe75 film on MgO and MAO, respectively
