Create the first easily customizable PLASTIC MAGNET, working at a fairly high temperature superconductivity by the standards.
Cheap, flexible electronics and better storage of computer data. All this can be achieved if the development receives an ultralight plastic magnet, developed by scientists at Ohio State University.
With colleagues from the University of Utah researchers have developed a plastic material that acquires the properties of the magnet when it is directed at the blue light laser. Lighting green spectrum modifies this effect.
Although until the possible applications is still very far away, this technology could develop and improve the magneto-optical recording system and data erasure.
Plastic magnets v is not new, they have already been developed in many institutions. And yet obtained before Magnets - insensitive, and received at the State University of Ohio - the first material which is superior magnetic properties of conventional magnets in 1.5 and works with the record high temperatures for this kind of magnets. The functions of the magnet shown at a temperature of 75 K (about -200 | C).
This temperature, which is close to the values for which the work modern high-temperature superconductors, which is a key factor in enabling the development of commercial applications of this technology.
The magnet has been developed as a result of 25 years of collaborative works between Arthur Epstein, a professor of physics and chemistry, director of the Materials Research Center at Ohio State University, and Joel Miller, a professor of chemistry at the University of Utah. They described the properties of a magnet in his article in Physical Review Letters.
Although our ordinary notions of the operating temperature of the magnet is quite cold and far from the room, this is the first step to building the future of mild forms of electronics.
Now that proved the feasibility of making magnets from organic or plastic, we can use what we know concerning organic chemistry to further improve its properties, Epstein said. Perhaps someday we can even improve the technology so that it will operate at room temperature.
The plastic magnet is made of a polymer in which there tetracyanoethylene (TCNE) combined with manganese ions (atoms of manganese removal of electrons).
Epstein and colleagues have made a powder of manganese ions in the thin film TCNE. Once they have been charged a six-hour continuous material flow blue laser beam, the magnetic properties of magnetic acquired at 150 percent of its normal level, and kept them in the dark.
Green laser light reversirovoval this effect by reducing the magnetic properties of the material up to 60 percent of its normal level.
Why light has such an impact? Researchers believe that the different wavelengths of blue and green light makes TCNE molecules in various ways to change its shape.
As soon as one molecule in the magnet changes the shape, changing its magnetic properties, and it encourages neighboring molecules to carry out the same transformation. In other words, v is it? Domino effect |.
Around the world, scientists and engineers are working to develop a better way to store computer data, based on light and magnetism. In theory, such a system would work magneto faster and much more efficiently than traditional electronics. Easily customizable magnet would be a more reliable source of information storage, as would not depend at all on electricity.
Information on the disc recorded and erased only by the magnetic properties.
Since the new magnet operates at a temperature of 75 K, this device may be used if it is placed in a regular or special refrigerators pour liquid nitrogen. Today, liquid nitrogen is less than milk v about $ 2 per gallon. However, such applications are still far from practical implementation.
Need to improve the properties of the magnet to a higher temperature before it goes on the ways of its commercial application.
Contact information:
Arthur J. Epstein, (614) 292-1133; Epstein.2 @ osu.edu
