Patent
Magnetic tape head with flux sensing element
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TLDR
In this article, a thin-film read-write magnetic head is used to record data on magnetic tape, and a shunt path is provided to bypass the flux sensing means so that all three sections of the head operate for recording.Abstract:
A thin film read-write magnetic head useful in a tape apparatus includes a magnetic circuit consisting of two thin film magnetic layers which form a magnetic yoke that is divided into three closely spaced sections, the central section of at least one of the magnetic layers containing an interspace in which a flux sensing element, such as a magnetoresistive device or Hall effect device, is located. The three section yoke forms a continuous magnetic circuit, except for the transducing gap, which circuit consists of three sections corresponding to the three sections of the yoke. The total gap width determines the width of the data track being recorded. During the write mode, a magnetic valve including an electrical conductor provides a shunt path to bypass the flux sensing means so that all three sections of the head operate for recording. During the read mode, only the central yoke section and its transducing gap portion sense the data signal recorded on the magnetic tape, and the read element detects the sensed signal. A saturation current is directed to the valve conductor during the read mode so that the shunt path is open, thereby allowing the flux sensing means to operate and sense the readout signal.read more
Citations
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References
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Patent
Magneto-resistance effect type magnetic head
TL;DR: In this paper, the authors proposed a simple structure to obtain a linear response property highly sensitive to signal magnetic flux by inclining the length of an MR element to the lenthwise direction of a slit.
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Read-write magnetic head with flux sensing read element
TL;DR: In this paper, a thin-film read-write magnetic head includes a write inductive section having a magnetic circuit consisting of thin film magnetic layers and a read flux sensing element, such as a magnetoresistive device or Hall effect device located in a gap in the magnetic circuit.
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TL;DR: In this paper, a thin film magnetic head includes an upper magnetic layer comprising a first yoke, a portion of which is divided into front and rear sections and which is provided near the divided sections with a magneto-resistive element.