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Magnetic remanence
The strength of the magnetic field that remains in a tape or magnetic particle after it is:
1. exposed to a strong, external magnetic field and;
2. the external field is removed.
The property of a tape that determines its ability to record and store a magnetic signal. Mr is the common abbreviation for magnetic remanence. Magnetic remanence (Mr) and magnetic retentivity (Br) both refer to the ability of the tape to retain a magnetic field; however, the latter is expressed in units of magnetic flux density.
The National Film and Sound Archive of Australia acknowledges Australia’s Aboriginal and Torres Strait Islander peoples as the Traditional Custodians of the land on which we work and live and gives respect to their Elders both past and present.