Related Experiment Video
Updated: May 21, 2025
10:36
Electric-field Control of Electronic States in WS2 Nanodevices by Electrolyte Gating
Published on: April 12, 2018
11.3K
Electrically switchable ON-OFF spin-orbit torque in an ionic-gated metallic trilayer
Soobeom Lee1,2, Suhyeok An1, Eunchong Baek1
1Department of Physics and Chemistry, Daegu Gyeongbuk Institute of Science and Technology, Daegu 42988, Republic of Korea.
Science Advances
|March 19, 2025
Summary
Researchers demonstrate switchable spin-orbit torque in a Pt/Co/Pt device using ionic gating. A negative electric field significantly enhances spin-orbit torque, paving the way for programmable spintronic devices.
Area of Science:
- Spintronics
- Materials Science
- Condensed Matter Physics
Background:
- Spin-orbit torque is a key electric technique for manipulating magnetization in spintronic devices.
- Developing efficient methods for dynamic magnetization control is crucial for advancing spintronic applications.
Purpose of the Study:
- To report gate-induced ON-OFF switchable spin-orbit torque in a Pt/Co/Pt device.
- To investigate the effect of electric gating on spin-orbit torque efficiency.
Main Methods:
- Utilized an ionic gating technique to apply electric fields to a Pt/Co/Pt spin-orbit device.
- Manipulated spin currents from Pt layers to achieve an OFF state.
- Measured the enhancement of damping-like spin-orbit torque under varying gate electric fields.
Main Results:
- Achieved gate-induced ON-OFF switchability of spin-orbit torque.
- Demonstrated a sixfold enhancement of damping-like spin-orbit torque under a strong negative gate electric field compared to a positive field.
- Explained the gate modulation by changes in spin-charge interconversion.
Conclusions:
- The study successfully demonstrates electrically controllable spin-orbit torque in a Pt/Co/Pt device.
- Gate modulation of spin-orbit torque is attributed to electric field-induced changes in spin-charge interconversion.
- This research offers a promising pathway for developing electrically programmable spintronic devices.
Related Concept Videos
01:13Torque On A Current Loop In A Magnetic Field
3.8K
The most common application of magnetic force on current-carrying wires is in electric motors. These consist of loops of wire, which are placed between the magnets with a magnetic field. When current flows through the loops, the magnetic field applies torque, which causes the shaft to rotate, thus converting electrical energy to mechanical energy.
Consider a rectangular current-carrying loop containing N turns of wire, placed in a uniform magnetic field. The net force on a current-carrying loop...
Consider a rectangular current-carrying loop containing N turns of wire, placed in a uniform magnetic field. The net force on a current-carrying loop...
3.8K
02:42Valence Bond Theory
8.4K
Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
8.4K
01:03Atomic Nuclei: Nuclear Spin State Overview
838
NMR-active nuclei have energy levels called 'spin states' that are associated with the orientations of their nuclear magnetic moments. In the absence of a magnetic field, the nuclear magnetic moments are randomly oriented, and the spin states are degenerate. When an external magnetic field is applied, the spin states have only 2 + 1 orientations available to them. A proton with = ½ has two available orientations. Similarly, for a quadrupolar nucleus with a nuclear spin value of...
838
01:22MOSFET: Enhancement Mode
256
Enhancement-mode MOSFETs are pivotal components in electronics, distinguished by their capacity to act as highly efficient switches. They are part of the larger family of metal-oxide Semiconductor Field-Effect Transistors (MOSFETs). They are available in two types: p-channel and n-channel, each tailored to specific polarity operations.
In their basic form, enhancement-mode MOSFETs are typically non-conductive when the gate-source voltage (Vgs) is zero. This default 'off' state means no...
In their basic form, enhancement-mode MOSFETs are typically non-conductive when the gate-source voltage (Vgs) is zero. This default 'off' state means no...
256
01:27Biasing of Metal-Semiconductor Junctions
183
Biasing metal-semiconductor junctions involves applying a voltage across the junction. Specifically, the metal is connected to a voltage source, while the semiconductor is grounded. This technique is essential for controlling the direction and magnitude of current flow in electronic devices, including diodes, transistors, and photovoltaic cells.
In Schottky junctions, where the semiconductor is n-type, applying a positive voltage to the metal relative to the semiconductor reduces its Fermi...
In Schottky junctions, where the semiconductor is n-type, applying a positive voltage to the metal relative to the semiconductor reduces its Fermi...
183
03:02Colors and Magnetism
11.4K
Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
11.4K