Home > Press > Nano-microscope gives first direct observation of the magnetic properties of 2D materials: Discovery means new class of materials and technologies
New diamond-based nano-microscope opens up potential for 2D materials. CREDIT David A. Broadway |
Abstract:
Australian researchers and their colleagues from Russia and China have shown that it is possible to study the magnetic properties of ultrathin materials directly, via a new microscopy technique that opens the door to the discovery of more two-dimensional (2D) magnetic materials, with all sorts of potential applications.
Published in the journal Advanced Materials, the findings are significant because current techniques used to characterise normal (three-dimensional) magnets don't work on 2D materials such as graphene due to their extremely small size - a few atom thick.
"So far there has been no way to tell exactly how strongly magnetic a 2D material was," said Dr Jean-Philippe Tetienne from the University of Melbourne School of Physics and Centre for Quantum Computation and Communication Technology.
"That is, if you were to place the 2D material on your fridge's door like a regular fridge magnet, how strongly it gets stuck onto it. This is the most important property of a magnet."
To address the problem, the team, led by Professor Lloyd Hollenberg, employed a widefield nitrogen-vacancy microscope, a tool they recently developed that has the necessary sensitivity and spatial resolution to measure the strength of 2D material.
"In essence, the technique works by bringing tiny magnetic sensors (so-called nitrogen-vacancy centres, which are atomic defects in a piece of diamond) extremely close to the 2D material in order to sense its magnetic field," Professor Hollenberg explained.
To test the technique, the scientists chose to study vanadium triiodide (VI3) as large 3D chunks of VI3 were already known to be strongly magnetic.
Using their special microscope, they have now shown that 2D sheets of VI3 are also magnetic but about twice as weak as in the 3D form. In other words, it would be twice as easy to get them off the fridge's door.
"This was a bit of a surprise, and we are currently trying to understand why the magnetisation is weaker in 2D, which will be important for applications," Dr Tetienne said.
Professor Artem Oganov of Skolkovo Institute of Science and Technology (Skoltech) in Moscow said the findings have the potential to trigger new technology.
"Just a few years ago, scientists doubted that two-dimensional-magnets are possible at all. With the discovery of two-dimensional ferromagnetic VI3, a new exciting class of materials emerged. New classes of material always mean that new technologies will appear, both for studying such materials and harnessing their properties."
The international team now plan to use their microscope to study other 2D magnetic materials as well as more complex structures, including those that are expected to play a key role in future energy-efficient electronics.
###
Other organizations involved in the research include University of Basel, RMIT University, Nanjing University of Posts and Telecommunications, Moscow Institute of Physics and Technology, Northwestern Polytechnical University, and Renmin University of China.
####
For more information, please click here
Contacts:
Lito Vilisoni Wilson
61-466-867-909
@unimelb
Copyright © University of Melbourne
If you have a comment, please Contact us.Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.
Related Links |
Related News Press |
News and information
Researchers develop artificial building blocks of life March 8th, 2024
Imaging
Nanoscale CL thermometry with lanthanide-doped heavy-metal oxide in TEM March 8th, 2024
The USTC realizes In situ electron paramagnetic resonance spectroscopy using single nanodiamond sensors November 3rd, 2023
Observation of left and right at nanoscale with optical force October 6th, 2023
2 Dimensional Materials
NRL discovers two-dimensional waveguides February 16th, 2024
'Sudden death' of quantum fluctuations defies current theories of superconductivity: Study challenges the conventional wisdom of superconducting quantum transitions January 12th, 2024
Magnetism/Magnons
Three-pronged approach discerns qualities of quantum spin liquids November 17th, 2023
Study on Magnetic Force Microscopy wins 2023 Advances in Magnetism Award: Analysis of finite size effects reveals significant consequences for density measurements November 3rd, 2023
Govt.-Legislation/Regulation/Funding/Policy
What heat can tell us about battery chemistry: using the Peltier effect to study lithium-ion cells March 8th, 2024
Researchers’ approach may protect quantum computers from attacks March 8th, 2024
Optically trapped quantum droplets of light can bind together to form macroscopic complexes March 8th, 2024
Possible Futures
Nanoscale CL thermometry with lanthanide-doped heavy-metal oxide in TEM March 8th, 2024
Chip Technology
New chip opens door to AI computing at light speed February 16th, 2024
HKUST researchers develop new integration technique for efficient coupling of III-V and silicon February 16th, 2024
NRL discovers two-dimensional waveguides February 16th, 2024
Discoveries
What heat can tell us about battery chemistry: using the Peltier effect to study lithium-ion cells March 8th, 2024
Researchers’ approach may protect quantum computers from attacks March 8th, 2024
High-tech 'paint' could spare patients repeated surgeries March 8th, 2024
Nanoscale CL thermometry with lanthanide-doped heavy-metal oxide in TEM March 8th, 2024
Materials/Metamaterials/Magnetoresistance
Nanoscale CL thermometry with lanthanide-doped heavy-metal oxide in TEM March 8th, 2024
Focused ion beam technology: A single tool for a wide range of applications January 12th, 2024
Announcements
What heat can tell us about battery chemistry: using the Peltier effect to study lithium-ion cells March 8th, 2024
Nanoscale CL thermometry with lanthanide-doped heavy-metal oxide in TEM March 8th, 2024
Interviews/Book Reviews/Essays/Reports/Podcasts/Journals/White papers/Posters
Researchers develop artificial building blocks of life March 8th, 2024
Nanoscale CL thermometry with lanthanide-doped heavy-metal oxide in TEM March 8th, 2024
Tools
Ferroelectrically modulate the Fermi level of graphene oxide to enhance SERS response November 3rd, 2023
The USTC realizes In situ electron paramagnetic resonance spectroscopy using single nanodiamond sensors November 3rd, 2023
Grants/Sponsored Research/Awards/Scholarships/Gifts/Contests/Honors/Records
'Sudden death' of quantum fluctuations defies current theories of superconductivity: Study challenges the conventional wisdom of superconducting quantum transitions January 12th, 2024
The latest news from around the world, FREE | ||
Premium Products | ||
Only the news you want to read!
Learn More |
||
Full-service, expert consulting
Learn More |
||