noun (plural retentivities)Physics
The ability of a substance to retain or resist magnetization, frequently measured as the strength of the magnetic field that remains in a sample after removal of an inducing field: iron is easily magnetized but has low retentivity [count noun]: a retentivity of about 10,000 gauss
More example sentences
- Note that residual magnetism and retentivity are the same when the material has been magnetized to the saturation point.
- Another serious problem concerning erase heads used in conjunction with record/write heads is that of magnetic retentivity.
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