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Related Concept Videos

Ferromagnetism01:31

Ferromagnetism

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Materials like iron, nickel, and cobalt consist of magnetic domains, within which the magnetic dipoles are arranged parallel to each other. The magnetic dipoles are rigidly aligned in the same direction within a domain by quantum mechanical coupling among the atoms. This coupling is so strong that even thermal agitation at room temperature cannot break it. The result is that each domain has a net dipole moment. However, some materials have weaker coupling, and are ferromagnetic at lower...
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Measuring Magnetically-Tuned Ferroelectric Polarization in Liquid Crystals
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Multi-Level Neuromorphic Devices Built on Emerging Ferroic Materials: A Review.

Cheng Wang1, Amogh Agrawal1, Eunseon Yu1

  • 1School of Electrical and Computer Engineering, Purdue University, West Lafayette, IN, United States.

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Ferroic-based multi-state devices offer a novel approach to neuromorphic computing. These ferromagnetic (FM) and ferroelectric (FE) devices enable efficient emulation of brain functions with high endurance and controllability.

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Area of Science:

  • Materials Science
  • Neuroscience
  • Computer Engineering

Background:

  • Neuromorphic hardware development requires multi-level devices to emulate bio-plausible functionalities like synaptic plasticity and neuronal activity.
  • Ferromagnetic (FM) and ferroelectric (FE) materials offer unique properties for creating multi-state devices.

Purpose of the Study:

  • This review focuses on FM and FE devices capable of representing multiple states.
  • The study discusses the application of these multi-level devices for implementing neuromorphic functionalities.
  • It elaborates on the underlying mechanisms and exemplary implementations.

Main Methods:

  • The review analyzes multi-domain switching dynamics in FM and FE thin films as the basis for analog-like resistive states.
  • It contrasts this mechanism with traditional memristive materials.
  • Exemplary device structures and their implementation of neural functionalities are highlighted.

Main Results:

  • Non-coherent multi-domain switching in FM/FE materials leads to analog-like resistive states, distinct from ion-based memristors.
  • These ferroic devices can represent multiple states, crucial for neuromorphic applications.
  • The non-destructive nature and simple physics of multi-domain switching are key advantages.

Conclusions:

  • Ferroic-based multi-state devices present an alternative pathway for energy-efficient neuro-inspired computing.
  • These devices offer potential advantages in endurance and controllability.
  • The findings suggest a promising future for ferroic materials in advanced computing hardware.