Magnetics Business & Technology - Winter 2015 - (Page 13)

RESEARCH & DEVELOPMENT Tiny Magnets Mimic Steam, Water and Ice Researchers at the Paul Scherrer Institute (PSI) have 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. "We were surprised and excited," said 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 customized 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 63 nanometers long and shaped roughly like grains of rice. The researchers used an advanced technique to place 1 billion of these tiny grains on a flat substrate to form a large-scale PSI researchers have created a magnetic metamaterial made of long nanomagnets, arranged in a flat, honeycomb pattern. The arrangement of magnetisation in the synthetic material assumed very different states at different temperatures - just like molecules in ice are more ordered than in water, and are in turn more ordered in water than in steam. (Image: PSI/Luca Anghinolfi) honeycomb pattern. The nanomagnets covered a total area of five by five millimeters. Thanks to a special measuring technique, the scientists initially studied the collective magnetic behavior of their metamaterial at Magnetic field measurement Go anywhere, measure anything! - Photo: Scott Maxwell, Jeremyculpdesign THM1176: The world's most compact 3-axis magnetometers. A selection of five probes measure from nanoteslas to 14 T, and get into the smallest of gaps: * THM1176-MF: general-purpose up to 3 T. * THM1176-LF: millitesla fringe fields. * THM1176-HF: superconducting magnets to 14 T. * THM1176-HFC: sub-millimeter gaps. * TFM1186: nanotesla-range perturbations. Powered by USB, with your own computer or an optional handheld, and with sophisticated analysis software, including spectral analysis. Flexibility simplicity that are out of this world! Pantone and 286 Pantone 032 Magnetic precision has a name annonce187x121.indd 2 08/11/12 09:49 Winter 2015 * Magnetics Business & Technology 13

Table of Contents for the Digital Edition of Magnetics Business & Technology - Winter 2015

Editor's Choice
What the Heck Happened to the Magnet Industry?
An Introduction to Resonant Inductive Power Transfer
Research & Development
Magnetics 2016: Preview
2016 Resource Guide
Industry News
Marketplace / Advertising Index
Spontaneous Thoughts: Small Ball

Magnetics Business & Technology - Winter 2015