New approach for identifying altermagnetic materials

  • Art
  • June 15, 2024

Magnetic materials have traditionally been classified as ferromagnetic, such as the decorative magnets on iron refrigerator doors that are seemingly always magnetic, or as antiferromagnetic, such as two bar magnets placed end to end with opposite poles and canceling each other out so that the material has no net magnetism. However, a third class of magnetic materials appears to exist that exhibit what was termed altermagnetism in 2022.

Microscopically, magnetism arises from a collection of small magnets associated with electrons, called spin. In ferromagnetic materials all the electron spins point in the same direction, while in antiferromagnetic materials the electron spins are aligned in opposite directions, with half pointing one way and half the other, canceling out the net magnetism. In theory, alternative magnetic materials are proposed to possess properties that combine those of both antiferromagnetic and ferromagnetic materials. One possible application of altermagnetic materials is spintronics technology, which aims to effectively use the spin of electrons in electronic devices such as next-generation magnetic memories. However, identifying alter magnets has been a challenge.

An international research group led by Associate Professor Atsushi Hariki of Osaka Metropolitan University's Graduate School of Engineering pioneered a new method to identify alter magnets, using manganese telluride (α-MnTe) as a testbed.

Using a supercomputer, the researchers theoretically predicted a fingerprint of altermagnetism in X-ray magnetic circular dichroism (XMCD), which measures the absorption difference between left- and right-circularly polarized light. Then, using the Diamond Light Source synchrotron in England, they experimentally demonstrated the XMCD spectrum for altermagnetic α-MnTe for the first time in the world.

“Our results show that XMCD is an effective method for the simple identification of altermagnetic materials,” said Professor Hariki. “It can also be expected that this will further accelerate the application of alter magnets in spintronics.”

Related Posts

  • Art
  • July 25, 2024
  • 2 views
  • 4 minutes Read
Researchers discover a faster, more energy-efficient way to produce an industrially important chemical

Polypropylene is a common type of plastic that is used in many essential products today, such as food containers and medical devices. Because polypropylene is so popular, the demand for…

  • Art
  • July 24, 2024
  • 3 views
  • 5 minutes Read
Urban moss study raises concerns about lead levels in older Portland neighborhoods

A new study of urban moss has found that lead levels in moss in older Portland, Oregon, neighborhoods that used lead telecommunications cables are up to 600 times higher than…

Leave a Reply

Your email address will not be published. Required fields are marked *

You Missed

'Inside Out 2' is the highest-grossing animated film ever, surpassing 'Frozen 2'

  • July 25, 2024
'Inside Out 2' is the highest-grossing animated film ever, surpassing 'Frozen 2'

LeVar Burton Talks His Changing Definition of Success on NPR's 'Wild Card' : NPR

  • July 25, 2024
LeVar Burton Talks His Changing Definition of Success on NPR's 'Wild Card' : NPR

Doctors react to Biden's live address to nation, concerned about 'lack of emotion'

  • July 25, 2024
Doctors react to Biden's live address to nation, concerned about 'lack of emotion'

USWNT defender Tierna Davidson on 'difficult situation' created by Korbin Albert's anti-LGBTQ posts

  • July 25, 2024
USWNT defender Tierna Davidson on 'difficult situation' created by Korbin Albert's anti-LGBTQ posts

South Korea GDP, Wall Street Sell-Off

  • July 25, 2024
South Korea GDP, Wall Street Sell-Off

This Retirement Misstep Could Cost You More Than $100,000 in Savings. Here’s What You Need to Know.

  • July 25, 2024
This Retirement Misstep Could Cost You More Than $100,000 in Savings. Here’s What You Need to Know.

Nvidia's latest AI offering could spark a gold rush for custom models

  • July 25, 2024
Nvidia's latest AI offering could spark a gold rush for custom models

Scouting Report for U.S. National Team Opponents at the 2024 Olympics: What to Know About Zambia and Barbra Banda as the U.S. Begins Its Journey

  • July 25, 2024
Scouting Report for U.S. National Team Opponents at the 2024 Olympics: What to Know About Zambia and Barbra Banda as the U.S. Begins Its Journey

Netanyahu thanks US for support at 'crossroads in history', calls protesters 'useful idiots'

  • July 25, 2024
Netanyahu thanks US for support at 'crossroads in history', calls protesters 'useful idiots'

Researchers discover a faster, more energy-efficient way to produce an industrially important chemical

  • July 25, 2024
Researchers discover a faster, more energy-efficient way to produce an industrially important chemical

Xander Schauffele or Scottie Scheffler for PGA Tour Player of the Year?

  • July 25, 2024
Xander Schauffele or Scottie Scheffler for PGA Tour Player of the Year?