Researchers from the Physics Department at the Universitat Autònoma de Barcelona (UAB), the Institut de Ciènca de Materials de Barcelona (ICMAB-CSIC), and the Universidad de Zaragoza have created a new ultra-light transparent magnetic material. Thanks to its properties, the new material could have interesting technological applications, such as creating new types of flat screens and magneto-optical memory devices for computers.
The researchers have obtained the new ultra-light magnets by combining silica aerogel (aerogels are extremely light solid materials, and are so porous that they’re made up of 99% air) with extremely fine magnetic particles composed of neodymium, iron and boron (Nd2Fe14B). These were orientated through a magnetic field during the synthesis. The new material retains the transparent and light properties of the aerogel, as well as the magnetic properties of the chemical composition. The magnets obtained by the researchers in the laboratory have a cylindrical shape about 1cm in diameter and several centimetres in length.
Until now, all aerogels with magnetic properties created in other laboratories were too “soft”, from a magnetic point of view, for storing information, and this closed all windows of opportunity on many technological applications. A weak external magnetic field could easily erase any information stored.
Octavi López Coronado | alfa
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Material defects in end products can quickly result in failures in many areas of industry, and have a massive impact on the safe use of their products. This is why, in the field of quality assurance, intelligent, nondestructive sensor systems play a key role. They allow testing components and parts in a rapid and cost-efficient manner without destroying the actual product or changing its surface. Experts from the Fraunhofer IZFP in Saarbrücken will be presenting two exhibits at the Blechexpo in Stuttgart from 7–10 November 2017 that allow fast, reliable, and automated characterization of materials and detection of defects (Hall 5, Booth 5306).
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