Thin Sensor For Contiguous Disk Devices
Original Publication Date: 1979-Dec-01
Included in the Prior Art Database: 2005-Feb-20
Contiguous disk bubble domain devices often use a long, straight NiFe strip parallel to a stretcher conductor for sensing bubble domains. Current through the stretcher conductor is used to stretch the bubble to be sensed along the NiFe strip. This type of stretcher/sensor operates reasonably well but requires high stretch currents. Additionally, a failure mechanism sometimes results when an opposing pole is formed at the location where the bubble enters the stretcher/sensor. This opposing pole occurs because, at this instant, the in-plane drive field is parallel to the NiFe sensor. If this magnetic pole is large enough, it will collapse the bubble.