Property of, particularly volcanic, rocks to be permanently magnetized in the direction of the Earth's magnetic field that existed at the time that the rock cooled below a certain temperature, which we call the Curie temperature (~-400-500 o). The direction of magnetization of these rocks does not change when they are transported to another location on earth.
The magnetic induction that remains in a magnetic circuit after the removal of an applied magnetizing force.
Amount a material remains magnetized after the magnetizing force has been removed.
Flux density remaining in a magnetic material after the removal of a magnetic field.
The remaining flux density after the magnetizing force has been removed.
The residual information that remains on storage media after erasure. For discussion purposes, it is better to characterize magnetic remanence as the magnetic representation of residual information that remains on magnetic media after the media has been erased. The magnetic flux that remains in a magnetic circuit after an applied magnetomotive force has been removed. [Random House Webster's College Dictionary, 1994] See also: Object Reuse
Remanence is the magnetization left behind in a medium after an external magnetic field is removed. It is denoted in equations as M_r. In engineering applications it is often assumed that the magnetization M is synonymous with the flux density B, hence the remanence is denoted as B_R (see the image).