Hopkinson effect

Hopkinson effect

[′häp·kən·sən i‚fekt]
(electromagnetism)
A phenomenon in which the permeability of a ferromagnetic material at low field strengths, measured as a function of temperature, reaches a maximum at a temperature a little below the Curie temperature.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.