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Researchers successfully test new alternative to traditional semiconductors
Date:8/9/2010

cting a device from all-organic material."

In the prototype device, electrons pass into the polymer, and a magnetic field orients them as spin up or spin down. The electrons can then pass into the conventional magnetic layer, but only if the spin of electrons there are oriented in the same way. If they are not, the resistance is too high for the electrons to pass. So the researchers were able to read spin data from their device based on whether the resistance was high or low.

Collaborators at the University of Wisconsin-Madison prepared a sample of conventional magnetic film, and Yoo and his Ohio State colleagues layered it together with the organic magnet to make a working device.

As a test, the researchers exposed the material to a magnetic field that varied in strength over time. To determine whether the material recorded the magnetic pattern and functioned as a good spin injector/detector, they measured the electric current passing through the two magnetic layers. This method is similar to the way computers read and write data to a magnetic hard drive today.

The results, Yoo said, were "textbook" -- they retrieved the magnetic data in its entirety, exactly as they stored it.

The patented technology should transfer easily to industry, he added. "Any place that makes computer chips could do this. Plus, in this case, we made the device at room temperature, and the process is very eco-friendly."


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Contact: Arthur J. Epstein
Epstein.2@osu.edu
614-292-1133
Ohio State University
Source:Eurekalert

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