Abstract

We have measured large scale strain as a function of field and external stress in two rare-earth iron alloys. From this data we calculate the external work and find it modified by various defects. The defects are characterized by a single parameter, T <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">o</inf> . A large scale figure-of-merit is found that exceeds that of hydraulics or electric motors.

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