Scientists use magnetic nano-rods to investigate how matter assembles
2013-05-06 0:00

From: NanoWerk

In the microscopic world, everything is in motion: atoms and molecules vibrate, proteins fold, even glass is a slow flowing liquid. And during each movement there are interactions between the smallest elements – for example, the atoms – and their neighbours. To make these movements visible, scientists at the Paul Scherrer Institute PSI have developed a special model system. It is so big that it can be easily observed under an X-ray microscope, and mimics the tiniest movements in Nature. The model: rings made from six nanoscale magnetic rods, whose north and south poles attract each other. At room temperature, the magnetisation direction of each of these tiny rods varies spontaneously. Scientists were able to observe the magnetic interactions between these active rods in real time. These research results were published on May 5 in the journal “Nature Physics”.

Scientists at the Paul Scherrer Institute PSI in Switzerland have developed a novel magnetic nano-system. This has allowed the first observation of spontaneous changes in the magnetisation direction at room temperature in such an artificial system. This system is fascinating, particularly for fundamental research, as it can be a model for many different interactions at the atomic and molecular level. Alan Farhan studied this model system as part of his doctoral thesis. Now, the results have been published in the prestigious science journal Nature Physics.


Magnetic nano-rods, arranged on the sides of a hexagon (bottom) or several hexagons (middle and top), form the ring systems studied by the scientists. Several linked rings serve as a model for a frustrated system: regardless of how the magnetisation of the central rod is oriented, energetically unfavourable conditions always arise, i.e. two north poles or two south poles will inevitably meet one another – marked in yellow.

[...]

Potential applications in theoretical physics and data storage applications

“Although our model system is relatively simple, it has allowed us to investigate heat-related fluctuations in a system in real space, and thus to delve deeper than ever before into the world of thermodynamics“, said Heyderman.
With their newly developed system, the scientists now want to obtain further insights into fundamental phenomena like phase transitions, geometrical frustration and the physics of glassy materials. Technological applications for data storage, transferring magnetic rather than electrical charge, might be also be possible.

Read the full article at: nanowerk.com




Related Articles
New Discovery Provides Unprecedented Control of Magnetic Fields
New kind of magnetism discovered: ’Quantum Spin Liquid’
Scientist Finds Hidden Portals in Earth’s Magnetic Field
Researchers watch nanoparticles self-assemble for the very first time
Nanoparticles Are in Our Food, Clothing and Medicine -- And No One Knows for Sure How Dangerous They Might Be


Latest News from our Front Page

Just Based on DNA, Scientists Can Construct an Image of Your Face
2015-02-26 22:05
Putting pencil to paper has been the tried-and-true method to illustrate the faces of wanted criminals, but new technology is changing this traditional approach. DNA, rather than an artist’s skill, is an emerging tool to recreate the face behind a crime. The new forensic technique is called DNA phenotyping. It relies on DNA, found for instance in a drop of blood, ...
FCC Votes In Favor Of Obama's Net Neutrality - Has The Slippery Slope To Web Censorship Begun?
2015-02-26 20:14
"An open Internet is essential to the American economy, and increasingly to our very way of life," according to President Obama and it appears his perspective on the heavy hand of government regulation inserting itself into the last bastion of freedom and dynamism in the US economy, is how best to achieve "openness." Having pressured FCC's Tom Wheeler, the vote ...
The Endgame: White Genocide
2015-02-25 21:06
Made by youtube.com/ThisisEuropa facebook.com/ThisIsEuropa “There is no place in modern Europe for ethnically pure states. That’s a 19th century idea and we are trying to transition into the 21st century, and we are going to do it with multi-ethnic states.” – Wesley Clark, U.S. general, ex-NATO Supreme Commander, talking about the NATO bombing of Serbia, 1999. What is White Genocide? ▪ Moving millions of ...
Former German Lawyer Sylvia Stolz has been jailed again
2015-02-26 3:28
Sylvia Stolz, the former defence attorney for Ernst Zundel has been convicted today in a Munich court, once again under the tyrannical BRD laws concerning so-called “holocaust denial” and thereby “inciting racial hatred”. She was sentenced to 20 months in prison with no possibility of parole. The case stems from her presentation at the AZK in Switzerland in 2012 where ...
FCC Chair Refuses to Testify before Congress ahead of Net Neutraility Vote
2015-02-26 0:49
Two prominent House committee chairs are “deeply disappointed” in Federal Communications Commission chairman Tom Wheeler for refusing to testify before Congress as “the future of the Internet is at stake.” Wheeler’s refusal to go before the House Oversight Committee on Wednesday comes on the eve of the FCC’s vote on new Internet regulations pertaining to net neutrality. The committee’s chairman, Representative ...
More News »