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Optimizing Magnetic Force Microscopy Resolution and Sensitivity to Visualize Nanoscale Magnetic Domains
Published on: July 20, 2022
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Voltage-based magnetization switching and reading in magnetoelectric spin-orbit nanodevices
Diogo C Vaz1, Chia-Ching Lin2, John J Plombon2
1CIC nanoGUNE BRTA, 20018, Donostia-San Sebastian, Basque Country, Spain. diogocastrovaz@gmail.com.
Nature Communications
|March 1, 2024
Summary
Researchers demonstrate voltage-controlled magnetic switching in nanodevices using multiferroic materials. This breakthrough offers a path toward low-power, beyond-CMOS logic technologies by enabling efficient magnetization control.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Nanotechnology
Background:
- CMOS technology scaling limitations necessitate novel logic devices.
- Spin-based devices offer scaling but have high switching energies.
- Magnetoelectric materials promise low-power magnetization control, yet device-level results are scarce.
Purpose of the Study:
- To demonstrate voltage-based magnetization switching and reading in nanodevices at room temperature.
- To explore the potential of magnetoelectric materials for low-power electronics.
- To establish building blocks for magnetoelectric spin-orbit logic.
Main Methods:
- Utilizing exchange coupling between multiferroic BiFeO3 and ferromagnetic CoFe for magnetization writing.
- Employing spin-to-charge current conversion between CoFe and Pt for reading.
- Investigating magnetization reversal via microscopy techniques linked to BiFeO3 polarization and cycloid propagation.
Main Results:
- Achieved voltage-based magnetization switching and reading in nanodevices.
- Demonstrated electrical switching of BiFeO3 reverses CoFe magnetization, yielding distinct voltage outputs.
- Linked magnetization reversal to the polarization state and antiferromagnetic cycloid propagation in BiFeO3.
Conclusions:
- The study provides a foundational step towards magnetoelectric spin-orbit logic.
- This work opens new avenues for developing low-power beyond-CMOS technologies.
- Voltage-controlled magnetic switching in multiferroic heterostructures is feasible at room temperature.
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