Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:


Tiny magnets mimic steam, water and ice


Researchers at the Paul Scherrer Institute (PSI) created a synthetic material out of 1 billion tiny magnets. Astonishingly, it now appears that the magnetic properties of this so-called metamaterial change with the temperature, so that it can take on different states; just like water has a gaseous, liquid and a solid state. This material made of nanomagnets might well be refined for electronic applications of the future – such as for more efficient information transfer.

A synthetic material – created from 1 billion nanomagnets – assumes different aggregate states depending on the temperature: the so-called metamaterial exhibits phase transitions, much like those between steam, water and ice. This effect was observed by a team of researchers headed by Laura Heyderman from PSI.

PSI researchers have created a synthetic magnetic metamaterial. Depending on the temperature it behaves similarly to ice, water and steam.

Paul Scherrer Institut/Luca Anghinolfi

“We were surprised and excited,” explains Heyderman. “Only complex systems are able to display phase transitions.” And as complex systems can provide new kinds of information transfer, the result of the new study also reveals that the PSI researchers’ metamaterial would be a potential candidate here.

The major advantage of the synthetic metamaterial is that it can be customised virtually freely. While the individual atoms in a natural material cannot be rearranged with pinpoint precision on such a grand scale, the researchers say that this is possible with the nanomagnets.

Honeycomb of nanomagnets

The magnets are only 63 nanometres long and shaped roughly like grains of rice. The researchers used a highly advanced technique to place 1 billion of these tiny grains on a flat substrate to form a large-scale honeycomb pattern. The nanomagnets covered a total area of five by five millimetres.

Thanks to a special measuring technique, the scientists initially studied the collective magnetic behaviour of their metamaterial at room temperature. Here there was no order in the magnetic orientation: the magnetic north and south poles pointed randomly in one direction or another.

When the researchers cooled the metamaterial gradually and constantly, however, they reached a point where a higher order appeared: the tiny magnets now noticed each other more than before. As the temperature fell further, there was another change towards an even higher order, in which the magnetic arrangement appeared almost frozen.

The long-range order of water molecules increases in a similar way at the moment when water freezes into ice. “We were fascinated by the fact that our synthetic material displayed this everyday phenomenon of a phase transition,” says Heyderman.

Metamaterial can be customised

In the next step, the researchers might influence these magnetic phase transitions by altering the size, shape and arrangement of the nanomagnets. This enables the creation of new states of matter, which could also give rise to applications: “The beauty of it all: tailored phase transitions could enable metamaterials to be adapted specifically for different needs in future,” explains Heyderman.

Besides its potential use in information transfer, the metamaterial might also prove useful in data storage or for sensors that measure magnetic fields. Very generally it could be used in spintronics, so in a promising future development in electronics for novel computer technology.

The measurements the researchers used to reveal the magnetic orientation of the nanomagnets, and therefore the properties of the metamaterial, can only be conducted exclusively at PSI. The equipment at the SμS, which is unique worldwide, supplies beams from exotic elementary particles called muons, which can be used to study nanomagnetic properties. The project took place in collaboration with a research group headed by Stephen Lee from the University of St Andrews, Scotland.

Text: Paul Scherrer Institut/Laura Hennemann

About PSI

The Paul Scherrer Institute (PSI) develops, builds and operates large, complex research facilities, and makes them available to the national and international research community. The Institute's own principle research interests are matter and material, energy and the environment, and human health. Educating young people is a key priority at PSI, which is why around a quarter of our staff are postdocs, doctoral students or undergraduates. PSI employs a total of 1,900 people, making it the largest research institute in Switzerland. Its annual budget amounts to around CHF 350 million.


Prof. Dr Laura Heyderman,
Laboratory of Micro- and Nanotechnology, Paul Scherrer Institute; telephone: +41 56 310 2613, e-mail:

Dr. Hubertus Luetkens,
Laboratory for Muon Spin Spectroscopy, Paul Scherrer Institute; telephone: +41 56 310 4450, e-mail:

Dr. Peter Derlet,
Solid State Theory Group, Paul Scherrer Institute; telephone: +41 56 310 3164, e-mail:

Original publication

Thermodynamic phase transitions in a frustrated magnetic metamaterial
L. Anghinolfi, H. Luetkens, J. Perron, M.G. Flokstra, O. Sendetskyi, A. Suter, T. Prokscha, P.M. Derlet, S.L. Lee, and L.J. Heyderman, Nature Communications, 21 September 2015, doi: 10.1038/ncomms9278 (Link:

Weitere Informationen:

http://Original press release at:
http://Micro- and Nanotechnology:
http://Research Using Muons:

Dagmar Baroke | idw - Informationsdienst Wissenschaft

More articles from Physics and Astronomy:

nachricht Light-driven atomic rotations excite magnetic waves
24.10.2016 | Max-Planck-Institut für Struktur und Dynamik der Materie

nachricht Move over, lasers: Scientists can now create holograms from neutrons, too
21.10.2016 | National Institute of Standards and Technology (NIST)

All articles from Physics and Astronomy >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Light-driven atomic rotations excite magnetic waves

Terahertz excitation of selected crystal vibrations leads to an effective magnetic field that drives coherent spin motion

Controlling functional properties by light is one of the grand goals in modern condensed matter physics and materials science. A new study now demonstrates how...

Im Focus: New 3-D wiring technique brings scalable quantum computers closer to reality

Researchers from the Institute for Quantum Computing (IQC) at the University of Waterloo led the development of a new extensible wiring technique capable of controlling superconducting quantum bits, representing a significant step towards to the realization of a scalable quantum computer.

"The quantum socket is a wiring method that uses three-dimensional wires based on spring-loaded pins to address individual qubits," said Jeremy Béjanin, a PhD...

Im Focus: Scientists develop a semiconductor nanocomposite material that moves in response to light

In a paper in Scientific Reports, a research team at Worcester Polytechnic Institute describes a novel light-activated phenomenon that could become the basis for applications as diverse as microscopic robotic grippers and more efficient solar cells.

A research team at Worcester Polytechnic Institute (WPI) has developed a revolutionary, light-activated semiconductor nanocomposite material that can be used...

Im Focus: Diamonds aren't forever: Sandia, Harvard team create first quantum computer bridge

By forcefully embedding two silicon atoms in a diamond matrix, Sandia researchers have demonstrated for the first time on a single chip all the components needed to create a quantum bridge to link quantum computers together.

"People have already built small quantum computers," says Sandia researcher Ryan Camacho. "Maybe the first useful one won't be a single giant quantum computer...

Im Focus: New Products - Highlights of COMPAMED 2016

COMPAMED has become the leading international marketplace for suppliers of medical manufacturing. The trade fair, which takes place every November and is co-located to MEDICA in Dusseldorf, has been steadily growing over the past years and shows that medical technology remains a rapidly growing market.

In 2016, the joint pavilion by the IVAM Microtechnology Network, the Product Market “High-tech for Medical Devices”, will be located in Hall 8a again and will...

All Focus news of the innovation-report >>>



Event News

#IC2S2: When Social Science meets Computer Science - GESIS will host the IC2S2 conference 2017

14.10.2016 | Event News

Agricultural Trade Developments and Potentials in Central Asia and the South Caucasus

14.10.2016 | Event News

World Health Summit – Day Three: A Call to Action

12.10.2016 | Event News

Latest News

Oasis of life in the ice-covered central Arctic

24.10.2016 | Earth Sciences

‘Farming’ bacteria to boost growth in the oceans

24.10.2016 | Life Sciences

Light-driven atomic rotations excite magnetic waves

24.10.2016 | Physics and Astronomy

More VideoLinks >>>