• HOME
  • NEWS
  • EXPLORE
    • CAREER
      • Companies
      • Jobs
    • EVENTS
    • iGEM
      • News
      • Team
    • PHOTOS
    • VIDEO
    • WIKI
  • BLOG
  • COMMUNITY
    • FACEBOOK
    • INSTAGRAM
    • TWITTER
Tuesday, August 5, 2025
BIOENGINEER.ORG
No Result
View All Result
  • Login
  • HOME
  • NEWS
  • EXPLORE
    • CAREER
      • Companies
      • Jobs
        • Lecturer
        • PhD Studentship
        • Postdoc
        • Research Assistant
    • EVENTS
    • iGEM
      • News
      • Team
    • PHOTOS
    • VIDEO
    • WIKI
  • BLOG
  • COMMUNITY
    • FACEBOOK
    • INSTAGRAM
    • TWITTER
  • HOME
  • NEWS
  • EXPLORE
    • CAREER
      • Companies
      • Jobs
        • Lecturer
        • PhD Studentship
        • Postdoc
        • Research Assistant
    • EVENTS
    • iGEM
      • News
      • Team
    • PHOTOS
    • VIDEO
    • WIKI
  • BLOG
  • COMMUNITY
    • FACEBOOK
    • INSTAGRAM
    • TWITTER
No Result
View All Result
Bioengineer.org
No Result
View All Result
Home NEWS Science News

Researchers from NUS create ‘whirling’ nano-structures in anti-ferromagnets

Bioengineer by Bioengineer
February 4, 2021
in Science News
Reading Time: 3 mins read
0
Share on FacebookShare on TwitterShare on LinkedinShare on RedditShare on Telegram

IMAGE

Credit: R. Shetty, K. Jani, H.Jani.

Today’s digital world generates vast amounts of data every second. Hence, there is a need for memory chips that can store more data in less space, as well as the ability to read and write that data faster while using less energy.

Researchers from the National University of Singapore (NUS), working with collaborators from the University of Oxford, Diamond Light Source (the United Kingdom’s national synchrotron science facility) and University of Wisconsin Madison, have now developed an ultra-thin material with unique properties that could eventually achieve some of these goals. Their results were first published online in the journal Nature on 4 February 2021.

Storing data in anti-ferromagnets

In existing ferromagnet memory devices like hard drives, information is stored into specific patterns of atoms (called bits), within which all the little magnetic poles are oriented in the same direction. This arrangement makes them slow and susceptible to damage by stray magnetic fields. In contrast, a special class of materials called anti-ferromagnets, made up with magnetic poles on adjacent atoms aligned oppositely, are emerging to be important for future memory technology.

In particular, there is a lot of interest in creating special magnetic nano-patterns in anti-ferromagnets that are shaped as whirls or vortices. In essence, each pattern consists of many little magnetic poles winding around a central core region in a clockwise or anti-clockwise manner, very much like air circulating inside a tornado or whirlwind. When realised experimentally, combinations of these anti-ferromagnetic whirls would be quite useful, as they are very stable structures and can potentially be moved along magnetic ‘race tracks’ at whirlwind speeds of a few kilometres per second!

They could act as new types of information bits that not only store memory but also participate in computational operations. Hence, they would enable a new generation of chips that are significantly faster yet more energy efficient than today’s devices.

Experimental discovery of whirls

To date, constructing and manipulating patterns in anti-ferromagnetic materials has been very challenging, as they appear almost non-magnetic from afar. “Standard approaches for control, such as using external fields, fail to work on these materials. Therefore, to realise these elusive anti-ferromagnetic whirls, we came up with a novel strategy that combined high-quality film synthesis from materials engineering, phase transitions from physics and topology from mathematics,” explained Dr Hariom Jani, who is the lead author of the paper and a Research Fellow from the NUS Department of Physics.

To grow these materials the researchers fired a laser at an extremely common and cheap material – iron-oxide, which is the main component of rust. By using ultra-short pulses of laser, they created a hot vapour of atomic particles that formed a thin film of iron-oxide on a surface.

Professor Thirumalai Venky Venkatesan, who led the NUS group and invented the pulsed laser deposition process for making the thin film, highlighted the versatility of the team’s approach. “The deposition process allows precise atom-level control during the growth, which is important for making high-quality materials. Our work points to a large class of anti-ferromagnetic material systems, containing phase transitions, in which one can study the formation and control of these whirls for eventual technological applications,” he said.

Explaining the underlying mechanism, Professor Paolo Radaelli, leader of the Oxford group, shared, “We drew inspiration from a celebrated idea in cosmological physics, from nearly 50 years ago, which proposed that a phase transition in the early universe, during the expansion after the Big Bang, may have resulted in the formation of cosmic whirls. Accordingly, we investigated an analogous magnetic process occurring in high-quality iron-oxide, which allowed us to create at will a large family of anti-ferromagnetic whirls.”

The team’s next step is to construct innovative circuits that can electrically control the whirls.

###

Media Contact
WONG Kai Yi
[email protected]

Original Source

https://news.nus.edu.sg/researchers-from-nus-create-whirling-nano-structures-in-anti-ferromagnets/

Tags: Atomic PhysicsAtomic/Molecular/Particle PhysicsChemistry/Physics/Materials SciencesElectromagneticsNanotechnology/Micromachines
Share12Tweet8Share2ShareShareShare2

Related Posts

World Models Power End-to-End Accident Prediction

World Models Power End-to-End Accident Prediction

August 5, 2025
Deep Sequencing Reveals Plasmodium vivax Lineages

Deep Sequencing Reveals Plasmodium vivax Lineages

August 5, 2025

Enamel Rod-End Patterns: New Forensic ID Tool?

August 5, 2025

Lab Study of α-1,6-Glucosylated Steviol Glycosides Metabolism

August 5, 2025
Please login to join discussion

POPULAR NEWS

  • blank

    Neuropsychiatric Risks Linked to COVID-19 Revealed

    72 shares
    Share 29 Tweet 18
  • Overlooked Dangers: Debunking Common Myths About Skin Cancer Risk in the U.S.

    61 shares
    Share 24 Tweet 15
  • Predicting Colorectal Cancer Using Lifestyle Factors

    46 shares
    Share 18 Tweet 12
  • Dr. Miriam Merad Honored with French Knighthood for Groundbreaking Contributions to Science and Medicine

    47 shares
    Share 19 Tweet 12

About

We bring you the latest biotechnology news from best research centers and universities around the world. Check our website.

Follow us

Recent News

World Models Power End-to-End Accident Prediction

Deep Sequencing Reveals Plasmodium vivax Lineages

Enamel Rod-End Patterns: New Forensic ID Tool?

  • Contact Us

Bioengineer.org © Copyright 2023 All Rights Reserved.

Welcome Back!

Login to your account below

Forgotten Password?

Retrieve your password

Please enter your username or email address to reset your password.

Log In
No Result
View All Result
  • Homepages
    • Home Page 1
    • Home Page 2
  • News
  • National
  • Business
  • Health
  • Lifestyle
  • Science

Bioengineer.org © Copyright 2023 All Rights Reserved.