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However, the realization of field\u2010free magnetization switching usually calls for intricate design and growth of heterostructure. In this study, it is found that the amorphous Mn<jats:sub>3<\/jats:sub>Sn can generate a highly efficient spin current with a strong <jats:italic>z<\/jats:italic>\u2010direction polarization component due to its spontaneous composition gradient, which switches the perpendicular magnetization in the absence of an external field. The SOT efficiency of gradient\u2010Mn<jats:sub>3<\/jats:sub>Sn can be reversibly modulated by the ionic liquid gating based on the migration of hydrogen ions, which reverses the polarity of field\u2010free magnetization switching and allows the realization of 16 binary Boolean logic functions in a single device by pure electrical methods. 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