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Related Concept Videos

MOS Capacitor01:25

MOS Capacitor

A Metal-Oxide-Semiconductor (MOS) capacitor is a fundamental structure used extensively in semiconductor device technology, particularly in the fabrication of integrated circuits and MOSFETs (metal-oxide-semiconductor field-effect transistors). The MOS capacitor consists of three layers: a metal gate, a dielectric oxide, and a semiconductor substrate.
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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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Gradient Echo Quantum Memory in Warm Atomic Vapor
10:00

Gradient Echo Quantum Memory in Warm Atomic Vapor

Published on: November 11, 2013

Magnetoelectric charge trap memory.

Uwe Bauer1, Marek Przybylski, Jürgen Kirschner

  • 1Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.

Nano Letters
|February 4, 2012
PubMed
Summary
This summary is machine-generated.

Engineered charge-trapping layers enable efficient electrical and optical control of ferromagnetic metal magnetism. This nonvolatile magnetoelectric effect, enhanced by retained charge, offers a path toward magnetic flash memory technology.

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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Electrical Engineering

Background:

  • The magnetoelectric effect allows control of magnetic properties via electric fields.
  • Existing methods often lack nonvolatility and high efficiency.
  • Charge trap flash memory technology is widespread in electronics.

Purpose of the Study:

  • To demonstrate efficient electrical and optical control of ferromagnetic metal magnetism using a charge-trapping layer.
  • To achieve nonvolatile magnetoelectric effects with enhanced efficiency.
  • To explore the potential for a magnetoelectric memory technology analogous to charge trap flash memory.

Main Methods:

  • Fabrication of a device integrating a charge-trapping layer with a ferromagnetic metal.
  • Electrical characterization of the magnetoelectric coupling.
  • Optical methods, including laser-induced charge trapping, to control magnetic properties.

Main Results:

  • Efficient electrical and optical control of magnetic properties was achieved.
  • Charge retention in the trapping layer provided nonvolatility.
  • Magnetoelectric effect efficiency was enhanced by an order of magnitude.
  • Optical imprinting of magnetic states into metal films was demonstrated.

Conclusions:

  • Engineered charge-trapping layers are effective for controlling ferromagnetic properties.
  • Nonvolatile, highly efficient magnetoelectric effects are achievable.
  • This approach could lead to novel magnetic memory devices, akin to charge trap flash memory.