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Definition of "Barkhausen noise" |
noise arising in magnetic read heads because the interlocking magnetic domains cannot rotate freely in response to an applied field. The response to an external magnetic field is randomly discontinuous as domains “stick,” and then release. Barkhausen noise is particularly important in very small heads and thin-film heads where very few domains are involved; in larger heads the effects of many domains tend to average out and Barkhausen noise is relatively less important. |
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