Number 17 (Story #2), January 17, 1991 by Phillip F. Schewe and Ben Stein A SUPERCONDUCTING FLUX FLOW TRANSISTOR (SFFT) , a new device developed at Sandia National Lab, exploits magnetic flux creep. This phenomenon in high-temperature superconductors, in which magnetic flux bundles begin to move under the influence of a supercurrent, may result in the loss of the superconducting state. In the SFFT this normally bothersome effect is used to switch (by breaking a linking conductive path) the device on or off. Sandia scientist David S. Ginley believes that the device can operate at a rate of 100 gigahertz and that applications for this technology may appear "in a year or two." (Scientific American, February 1991.)