Large Field-Like spin-orbit torque and magnetization manipulation in a full epitaxial van der Waals 2D-ferromagnet/Topological-insulator heterostructure grown by molecular beam epitaxy - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Physical Review Applied Année : 2023

Large Field-Like spin-orbit torque and magnetization manipulation in a full epitaxial van der Waals 2D-ferromagnet/Topological-insulator heterostructure grown by molecular beam epitaxy

M. Heuken
  • Fonction : Auteur

Résumé

With the development of novel technologies taking advantage of emerging quantum phenomena at extreme conditions of dimensionality and temperature, the search for new materials and heterostructures engineering has opened up in several fronts. Here we report the magnetotransport properties of topological insulator/2D-ferromagnet (TI/2D-FM) heterostructures composed of Cr 1+δ Te 2 /Bi 2 Te 3 stacks grown by molecular beam epitaxy (MBE). The electrical transport measurements revealed high levels of Field-Like effective torques, up to 115 mT at a current density of 10 7 A/cm 2 , the occurrence of interfacial magnetoresistance effects, such as the Anisotropic Interfacial Magnetoresistance (AIMR), and anomalies in the Anomalous Hall effect. Furthermore, we report on complementary characterization with scanning tunneling microscopy, angle-resolved photoemission spectroscopy, and SQUID measurements. Finally, magnetization reversal induced by current pulses is also reported. The reported results make evident the relevance of the TI/2D-FM interface and indicate the preservation of polarized surface states at the interface.
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Dates et versions

hal-04226759 , version 1 (03-10-2023)

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N. Figueiredo-Prestes, S. Krishnia, J. Peiro, V. Zatko, B. Dlubak, et al.. Large Field-Like spin-orbit torque and magnetization manipulation in a full epitaxial van der Waals 2D-ferromagnet/Topological-insulator heterostructure grown by molecular beam epitaxy. Physical Review Applied, 2023, 19 (1), pp.014012. ⟨10.1103/PhysRevApplied.19.014012⟩. ⟨hal-04226759⟩
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