Abstract
We have epitaxially deposited FeGa films onto MgO(001) substrates at an oblique angle $\varphi $ varying from 0° to 45° and systematically investigated their magnetization reversal. The square and two-step hysteresis loops were observed in the samples deposited at $\varphi = 0 {^{\circ }}$ and 15°. The reversed two-step and three-step hysteresis loops were observed in the samples deposited at $\varphi =30 {^{\circ }}$ and 45°, in which a strong uniaxial magnetic anisotropy $K_{u}$ was induced by the oblique deposition. A model based on domain wall (DW) nucleation and propagation was employed to quantitatively describe the angular-dependent behaviors of FeGa epitaxial films, which indicates that, for the samples deposited with increasing $\varphi $ , the 180° magnetic transitions occurring in the magnetic field orientation between −45° and 45° gradually change from the two successive 90° DW nucleations to the 180° DW nucleation.
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