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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.
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A stationary charge creates and interacts with the electric field, while a moving charge creates a magnetic field.
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Current-Induced Spin-Orbit Torques for Spintronic Applications.

Jeongchun Ryu1, Soogil Lee1, Kyung-Jin Lee2

  • 1Department of Materials Science and Engineering, KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea.

Advanced Materials (Deerfield Beach, Fla.)
|March 7, 2020
PubMed
Summary
This summary is machine-generated.

Spin-orbit torque (SOT) offers efficient control of magnetization in spintronic devices. This review highlights advances in SOT materials, field-free switching, and logic device functionalities.

Keywords:
MRAMspin currentsspin logic devicesspin-orbit torquesspintronic applications

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Area of Science:

  • Spintronics
  • Condensed Matter Physics
  • Materials Science

Background:

  • Control of magnetization in magnetic nanostructures is crucial for spintronic devices, impacting energy consumption, density, and speed.
  • Spin-orbit torque (SOT), derived from spin-orbit interaction, enables efficient magnetization manipulation via in-plane currents.
  • SOT is pivotal for emerging applications like high-speed memories, reconfigurable logic, and neuromorphic computing.

Purpose of the Study:

  • To review recent advancements in spin-orbit torque (SOT) research.
  • To highlight the benefits and challenges associated with SOT-based spintronic devices.
  • To discuss materials, structural engineering, and experimental results for efficient SOT switching.

Main Methods:

  • Review of materials and structural engineering for enhanced SOT efficiency.
  • Summarization of experimental results for field-free SOT switching of perpendicular magnetization.
  • Presentation of advanced SOT functionalities in spin logic devices.

Main Results:

  • Materials and structural engineering significantly enhance SOT efficiency.
  • Field-free SOT switching is achieved through internal effective magnetic fields and tailored spin currents.
  • Demonstration of reconfigurable and complementary operations in advanced SOT spin logic devices.

Conclusions:

  • SOT is a key technology for next-generation spintronic devices.
  • Continued research in materials and device design will overcome current challenges.
  • SOT enables sophisticated functionalities for logic and memory applications.