{"database":"biostudies-literature","file_versions":[],"scores":null,"additional":{"submitter":["Lee MH"],"funding":["National Research Foundation of Korea","Samsung Electronics"],"pagination":["21081"],"full_dataset_link":["https://www.ebi.ac.uk/biostudies/studies/S-EPMC8548299"],"repository":["biostudies-literature"],"omics_type":["Unknown"],"volume":["11(1)"],"pubmed_abstract":["Quantifying the spin-orbit torque (SOT) efficiency with changing the layer thickness is crucial for understanding the physical background of SOT. This study investigates the Nb-thickness-dependent SOT efficiency of two types of layered heterostructures: Ta/Nb/CoFeB and Pt/Nb/CoFeB. We find that the Nb thickness dependence of the SOT efficiency in the two samples is quite different. In the Pt/Nb series, the SOT sign changes according to the thickness variation because Pt and Nb have different spin-orbit coupling signs. We observe the resulting reversal in switching polarity through current-induced SOT switching experiments. However, due to the same spin-orbit coupling signs of Ta and Nb, no such polarity reversal was observed in Ta/Nb series. Further, we extract the spin diffusion length of Nb in each heterostructure. These results provide a systematic understanding of the material- and thickness-dependent SOT characteristics."],"journal":["Scientific reports"],"pubmed_title":["Spin-orbit torques in normal metal/Nb/ferromagnet heterostructures."],"pmcid":["PMC8548299"],"funding_grant_id":["2020M3F3A2A01082591","2021R1A6A3A13045716","2015M3D1A1070465","IO201211-08104-01"],"pubmed_authors":["Lee MH","Kim T","Kim GW","Kim YK","Kim YJ","Cha IH","Lee KJ","Go G"],"additional_accession":[]},"is_claimable":false,"name":"Spin-orbit torques in normal metal/Nb/ferromagnet heterostructures.","description":"Quantifying the spin-orbit torque (SOT) efficiency with changing the layer thickness is crucial for understanding the physical background of SOT. This study investigates the Nb-thickness-dependent SOT efficiency of two types of layered heterostructures: Ta/Nb/CoFeB and Pt/Nb/CoFeB. We find that the Nb thickness dependence of the SOT efficiency in the two samples is quite different. In the Pt/Nb series, the SOT sign changes according to the thickness variation because Pt and Nb have different spin-orbit coupling signs. We observe the resulting reversal in switching polarity through current-induced SOT switching experiments. However, due to the same spin-orbit coupling signs of Ta and Nb, no such polarity reversal was observed in Ta/Nb series. Further, we extract the spin diffusion length of Nb in each heterostructure. These results provide a systematic understanding of the material- and thickness-dependent SOT characteristics.","dates":{"release":"2021-01-01T00:00:00Z","publication":"2021 Oct","modification":"2025-04-19T15:33:39.632Z","creation":"2025-04-19T15:33:39.632Z"},"accession":"S-EPMC8548299","cross_references":{"pubmed":["34702943"],"doi":["10.1038/s41598-021-99745-4"]}}