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Here, a novel exchange\u2010spring magnetic structure is introduced formed by the coupling of perpendicular magnetic anisotropy (PMA) CoTb and in\u2010plane magnetic anisotropy (IMA) Co films. When a spin current with the polarization along the y\u2010direction flows through this exchange\u2010spring (x\u2010z plane) structure, the interaction between the y\u2010spin and the local exchange field with a non\u2010collinear spatial distribution gives rise to substantial unconventional spin polarizations in the x\u2010 and z\u2010directions, enabling field\u2010free spin\u2010orbit torque driven perpendicular magnetization switching at room temperature. More importantly, the polarization directions of this unconventional spin current can be reversed depending on whether the interfacial exchange coupling is ferromagnetic or antiferromagnetic. This work establishes a platform to explore emergent mechanisms for manipulating unconventional spin polarization with rich non\u2010collinear magnetic exchange spin structures.<\/jats:p>","DOI":"10.1002\/adma.202414139","type":"journal-article","created":{"date-parts":[[2024,12,9]],"date-time":"2024-12-09T08:38:31Z","timestamp":1733733511000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":8,"title":["Manipulation of Unconventional Spin Polarization in Non\u2010Collinear Exchange\u2010Spring Magnetic Structures"],"prefix":"10.1002","volume":"37","author":[{"given":"Chuangwen","family":"Wu","sequence":"first","affiliation":[{"name":"Songshan Lake Materials Laboratory  Dongguan Guangdong 523808 China"},{"name":"Faculty of Physics and Electronic Science Hubei University  Wuhan 430062 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