Magnetic tunnel junctions are constructed from a MgO or Mg\u2014ZnO tunnel barrier and amorphous magnetic layers in proximity with, and on respective sides of, the tunnel barrier. The device includes a pulley; a movable structure bearing a pivot pin for rotation of the pulley to which is applied a traction force. The health care provider develops a script program using the health care provider apparatus and then sends the script program to a remotely programmable patient apparatus through a communication network such as the World Wide Web.