Magnetostriction

1842

Magnetostriction

The book of science

Tom Sharp

James Prescott Joule electromagnetism

Magnetostriction

Magnetomechanical effects

Microstrains

Different magnetostrictive materials shrink by different amounts in a magnetic field, depending on the temperature and strength of the field. At room temperature, colbalt can shrink six thousands of a percent. Terfenol-D, a terbium-iron-dysprosium alloy, can shrink two tenths of a percent. Magnetostriction is measured in microstrains, which are parts per million.

See also in The book of science:

Readings on wikipedia: