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Maximizing the SOT efficiency is a key goal that is pursued via increasing the net spin generation and accumulation. However, spin transport in antiferromagnets is seriously restricted due to the strong antiferromagnetic coupling, which blocks the development of antiferromagnetic\u2010based devices. Here, a significant enhancement of SOT efficiency in Ir<jats:sub>20<\/jats:sub>Mn<jats:sub>80<\/jats:sub> (IrMn)\u2010based heterostructure associated with the orbital effect of naturally oxidized Cu (Cu*) bottom layer is reported. Considering the weak spin\u2013orbit coupling of Cu*, the enhancement results from an orbital current generated from charge current at the Cu*\/IrMn interface that contributes to spin current in the IrMn layer due to the strong spin\u2013orbit coupling. The SOT efficiency variation with IrMn thickness reveals the process of orbital angular momentum (OAM) transportation and conversion. Moreover, the contribution of orbital current is verified by the critical current density decreasing of SOT\u2010driven magnetization switching in Cu*\/IrMn\/[Co\/Pt]<jats:sub>3<\/jats:sub> heterostructure. This study opens a path to design high\u2010efficient SOT\u2010based spintronic devices combining the advantages of OAM and metallic antiferromagnets.<\/jats:p>","DOI":"10.1002\/adma.202418264","type":"journal-article","created":{"date-parts":[[2025,3,17]],"date-time":"2025-03-17T06:31:42Z","timestamp":1742193102000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":8,"title":["Orbital Angular Momentum Correlated Charge to Spin Conversion in Metallic Antiferromagnet"],"prefix":"10.1002","volume":"37","author":[{"given":"Zhiqiang","family":"Zhu","sequence":"first","affiliation":[{"name":"School of Materials Science and Engineering University of Science and Technology Beijing  Beijing 100083 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lu","family":"Cheng","sequence":"additional","affiliation":[{"name":"School of Materials Science and Engineering University of Science and Technology Beijing  Beijing 100083 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7659-865X","authenticated-orcid":false,"given":"Xiaoguang","family":"Xu","sequence":"additional","affiliation":[{"name":"School of Materials Science and Engineering University of Science and Technology Beijing  Beijing 100083 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kangkang","family":"Meng","sequence":"additional","affiliation":[{"name":"School of Materials Science and Engineering University of Science and Technology Beijing  Beijing 100083 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jingyan","family":"Zhang","sequence":"additional","affiliation":[{"name":"School of Materials Science and Engineering University of Science and Technology Beijing  Beijing 100083 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xiao","family":"Deng","sequence":"additional","affiliation":[{"name":"School of Materials Science and Engineering University of Science and Technology Beijing  Beijing 100083 China"},{"name":"Beijing National Laboratory for Condensed Matter Physics and Institute of Physics Chinese Academy of Sciences  Beijing 100190 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tao","family":"Zhu","sequence":"additional","affiliation":[{"name":"Beijing National Laboratory for Condensed Matter Physics and Institute of Physics Chinese Academy of Sciences  Beijing 100190 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hualiang","family":"Lv","sequence":"additional","affiliation":[{"name":"Shanghai Frontiers Science Research Base of Intelligent Optoelectronics and Perception Institute of Optoelectronics Fudan University  Shanghai 200433 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Renchao","family":"Che","sequence":"additional","affiliation":[{"name":"Laboratory of Advanced Materials Shanghai Key Lab of Molecular Catalysis and Innovative Materials Academy for Engineering &amp; Technology Advanced Coatings Research Center of Ministry of Education of China Fudan University  Shanghai 200438 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Dingfu","family":"Shao","sequence":"additional","affiliation":[{"name":"Key Laboratory of Materials Physics Institute of Solid\u2010State Physics HFIPS Chinese Academy of Sciences  Hefei 230031 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Delin","family":"Zhang","sequence":"additional","affiliation":[{"name":"Institute of Quantum Materials and Devices School of Electronic and Information Engineering State Key Laboratory of Separation Membranes and Membrane Processes Tiangong University  Tianjin 300387 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yong","family":"Wu","sequence":"additional","affiliation":[{"name":"School of Materials Science and Engineering University of Science and Technology Beijing  Beijing 100083 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Gang","family":"Zhang","sequence":"additional","affiliation":[{"name":"Yangtze Delta Region Academy of Beijing Institute of Technology (Jiaxing)  Jiaxing 314019 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yong","family":"Jiang","sequence":"additional","affiliation":[{"name":"School of Materials Science and Engineering University of Science and Technology Beijing  Beijing 100083 China"},{"name":"Institute of Quantum Materials and Devices School of Electronic and Information Engineering State Key Laboratory of Separation Membranes and Membrane Processes Tiangong University  Tianjin 300387 China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2025,3,17]]},"reference":[{"key":"e_1_2_8_1_1","doi-asserted-by":"publisher","DOI":"10.1038\/nmat2024"},{"key":"e_1_2_8_2_1","doi-asserted-by":"publisher","DOI":"10.1038\/nmat3311"},{"key":"e_1_2_8_3_1","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevB.54.9353"},{"key":"e_1_2_8_4_1","doi-asserted-by":"publisher","DOI":"10.1016\/0304-8853(96)00062-5"},{"key":"e_1_2_8_5_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jmmm.2007.12.019"},{"key":"e_1_2_8_6_1","doi-asserted-by":"publisher","DOI":"10.1038\/nature10309"},{"key":"e_1_2_8_7_1","doi-asserted-by":"publisher","DOI":"10.1126\/science.1218197"},{"key":"e_1_2_8_8_1","doi-asserted-by":"publisher","DOI":"10.1126\/science.aaa1442"},{"key":"e_1_2_8_9_1","doi-asserted-by":"publisher","DOI":"10.1038\/s41467-023-38550-1"},{"key":"e_1_2_8_10_1","doi-asserted-by":"publisher","DOI":"10.1063\/1.4968785"},{"key":"e_1_2_8_11_1","doi-asserted-by":"publisher","DOI":"10.1038\/nmat4566"},{"key":"e_1_2_8_12_1","doi-asserted-by":"publisher","DOI":"10.1002\/adfm.202313332"},{"key":"e_1_2_8_13_1","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevB.95.075128"},{"key":"e_1_2_8_14_1","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevApplied.13.044020"},{"key":"e_1_2_8_15_1","doi-asserted-by":"publisher","DOI":"10.1038\/s41563-021-00946-z"},{"key":"e_1_2_8_16_1","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevLett.128.197202"},{"key":"e_1_2_8_17_1","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevLett.95.066601"},{"key":"e_1_2_8_18_1","doi-asserted-by":"publisher","DOI":"10.1126\/science.1105514"},{"key":"e_1_2_8_19_1","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevLett.94.047204"},{"key":"e_1_2_8_20_1","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevLett.98.156601"},{"key":"e_1_2_8_21_1","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevLett.121.086602"},{"key":"e_1_2_8_22_1","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevLett.105.126602"},{"key":"e_1_2_8_23_1","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevLett.102.016601"},{"key":"e_1_2_8_24_1","doi-asserted-by":"publisher","DOI":"10.1038\/s41586-023-06101-9"},{"key":"e_1_2_8_25_1","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevLett.107.156803"},{"key":"e_1_2_8_26_1","doi-asserted-by":"publisher","DOI":"10.1038\/nature23898"},{"key":"e_1_2_8_27_1","doi-asserted-by":"publisher","DOI":"10.1126\/science.aaw3780"},{"key":"e_1_2_8_28_1","doi-asserted-by":"publisher","DOI":"10.1038\/ncomms13069"},{"key":"e_1_2_8_29_1","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevLett.121.017202"},{"key":"e_1_2_8_30_1","doi-asserted-by":"publisher","DOI":"10.1126\/sciadv.aax4278"},{"key":"e_1_2_8_31_1","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevLett.125.177201"},{"key":"e_1_2_8_32_1","doi-asserted-by":"publisher","DOI":"10.1038\/s41467-021-26650-9"},{"key":"e_1_2_8_33_1","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevLett.106.036601"},{"key":"e_1_2_8_34_1","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevLett.128.067201"},{"key":"e_1_2_8_35_1","doi-asserted-by":"crossref","DOI":"10.1103\/PhysRevB.103.L020407","volume":"103","author":"Kim J.","year":"2021","journal-title":"Phys. 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