Abstract
The magnetization reversal has been studied in an exchange-biased $\mathrm{Ca}\mathrm{Mn}{\mathrm{O}}_{3}∕{\mathrm{La}}_{0.67}{\mathrm{Sr}}_{0.33}\mathrm{Mn}{\mathrm{O}}_{3}$ bilayer film grown on vicinal $\mathrm{Sr}\mathrm{Ti}{\mathrm{O}}_{3}(100)$. Of particular interest, double magnetic switching was observed in certain field orientations. By using a phenomenological energy model of the domain wall motion, the double switching observed at $5\phantom{\rule{0.3em}{0ex}}\mathrm{K}$ is attributed to two successive 90\ifmmode^\circ\else\textdegree\fi{} domain wall processes driven by the interfacial exchange coupling. This investigation clearly shows that in addition to the conventional unidirectional anisotropy, the antiferromagnetic/ferromagnetic coupling also induces high-order exchange anisotropies, which can form even above the N\'eel temperature.
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