Researchers use laser light to transform metal into magnet

phys.org | 7/29/2019 | Staff
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Pioneering physicists from the University of Copenhagen and Nanyang Technological University in Singapore have discovered a way to get non-magnetic materials to make themselves magnetic by way of laser light. The phenomenon may also be used to endow many other materials with new properties.

The intrinsic properties of materials arise from their chemistry—from the types of atoms that are present and the way that they are arranged. These factors determine, for example, how well a material may conduct electricity or whether or not it is magnetic. Therefore, the traditional route for changing or achieving new material properties has been through chemistry.

Pair - Researchers - University - Copenhagen - Nanyang

Now, a pair of researchers from the University of Copenhagen and Nanyang Technological University in Singapore have discovered a new physical route to the transformation of material properties: when stimulated by laser light, a metal can transform itself from within and suddenly acquire new properties.

"For several years, we have been looking into how to transform the properties of a matter by irradiating it with certain types of light. What's new is that not only can we change the properties using light, we can trigger the material to change itself, from the inside out, and emerge into a new phase with completely new properties. For instance, a non-magnetic metal can suddenly transform into a magnet," explains Associate Professor Mark Rudner, a researcher at the University of Copenhagen's Niels Bohr Institute.

Justin - Song - Nanyang - Technological - University

He and colleague Justin Song of Nanyang Technological University in Singapore made the discovery that is now published in Nature Physics. The idea of using light to transform the properties of a material is not novel in itself. But up to now, researchers have only been capable of manipulating the properties already found in a material. Giving a metal its own "separate life," allowing it to generate its own new properties, has never...
(Excerpt) Read more at: phys.org
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