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Updated: May 30, 2025
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Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
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Tunable Spin and Orbital Torques in Cu-Based Magnetic Heterostructures
1Institut de Ciència de Materials de Barcelona, Campus de la UAB, Bellaterra 08193, Spain.
Nano Letters
|January 29, 2025
Summary
Earth-abundant 3d elements enable low-cost spintronic devices. Researchers achieved high current-induced torque efficiencies in NiFe/Cu heterostructures, demonstrating gate-tunable control for advanced applications.
Area of Science:
- Spintronics
- Materials Science
- Condensed Matter Physics
Background:
- Current-induced torques are crucial for spintronic memory and logic.
- Orbital currents offer efficient torque generation from 3d transition metals.
- Earth-abundant materials are sought for sustainable spintronic applications.
Purpose of the Study:
- To investigate current-induced spin and orbital torques in copper-based magnetic heterostructures.
- To explore the potential of NiFe/Cu bilayers for spintronic applications.
- To demonstrate gate-tunable control of torques by manipulating copper's oxidation state.
Main Methods:
- Fabrication of NiFe/Cu bilayers.
- Characterization of current-induced torques.
- Solid-state gating to tune copper oxidation states.
Main Results:
- Engineered NiFe/Cu bilayers exhibit high torque efficiencies, surpassing Co/Pt.
- Naturally oxidized copper in NiFe/Cu enhances torque generation.
- Sign and amplitude of damping-like torque are controllable via solid-state gating.
Conclusions:
- Cu-based heterostructures show promise for efficient spintronic devices.
- Gate-tunable control of torques is achievable by manipulating copper oxidation.
- Findings advance understanding of charge, spin, and orbital transport for spin-orbitronic devices.
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