Exchange bias or exchange anisotropy occurs in bilayers (or multilayers) of magnetic materials where the hard magnetization behavior of an antiferromagnetic thin film causes a shift in the soft magnetization curve of a ferromagnetic film. The exchange bias phenomenon is of tremendous utility in magnetic recording, where it is used to pin the state of the readback heads of hard disk drives at exactly their point of maximum sensitivity; hence the term "bias."
Other articles related to "exchange bias, exchange":
... Exchange anisotropy was discovered by Meiklejohn and Bean of General Electric in 1956 ... The first commercial device to employ the exchange bias was IBM's anisotropic magnetoresistance (AMR) disk drive recording head, which was based on a design ... By the mid-1990s, the spin valve head using an exchange-bias layer was well on its way to displacing the AMR head ...
Famous quotes containing the words bias and/or exchange:
“The solar system has no anxiety about its reputation, and the credit of truth and honesty is as safe; nor have I any fear that a skeptical bias can be given by leaning hard on the sides of fate, of practical power, or of trade, which the doctrine of Faith cannot down-weigh.”
—Ralph Waldo Emerson (18031882)
“Love is often nothing but a favorable exchange between two people who get the most of what they can expect, considering their value on the personality market.”
—Erich Fromm (19001980)