Computer Memory : for Data in ‘Phase-Change’ Material

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                         <-: Computer Memory :->

                 for Data in ‘Phase-Change’ Material

…………………………………………………………………………………………………… properties    of a common memory material, they having the way for development of new forms of memory drives, movie discs and computer systems. 

        they are to try the retain data more quickly, last longer and allow far more capacity than current data   storage media.

             On April 16th the work was reported in the online edition of 
             Proceedings of the National Academy of Sciences.

        This research only focused on an inexpensive memory composed of germanium, antimony and tellurium, called GST, for short. The material is already used in rewritable optical media, including CD-RW and DVD-RW discs. But by using diamond-tipped tools to apply pressure to the materials.

        “This phase-change memory is more stable than the material used in the current flash drives. It works 100 times faster and is rewritable about 100,000 times,” said the doctoral student in the Department of Materials Science and Engineering.

        “Within about five years, it could also be used to replace hard drives in computers and give them more memory.”

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GST is called a phase-change material

        because, when exposed to heat, areas of GST can change from an amorphous state to a crystalline state. In its amorphous state, GST is more resistant to electric current. In its crystalline state, it is less resistant.

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        The two phases are also reflect light differently, allowing the surface of a DVD to be read by

tiny laser.

       The two states represent ones and zeros, the language of computers.

       this phase-change material has been used for at least two decades, the precise mechanics of

this switch from one state to another have remained something of a MYSTERY. 

To solve this MYSTERY….

Pls saw this figure to easily understand

the all team members are used another method to trigger the change more gradually. The researchers used two diamond tips to compress the material. They employed a process called X-ray diffraction and a computer simulation to document.they found that they could “tune” the electrical resistivity of the material during the time between its change from amorphous to crystalline form.

          “Instead of going from black to white, it’s like finding shades or a shade of gray in between &

By having a wide range of resistance, you can have a lot more control. If you have multiple states, you can store a lot more data.”

………………………………………………………Thank_You………………………………………………………….

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