| Quartz Tuning Fork Magnetic Sensor for Recording Head and Media Testing | |||
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Mladen Todorovic and Sheldon Schultz
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The ever increasing demand for higher density storage requires the development of advanced recording media and sensors. This in turn requires the development of testing instrumentation that necessarily combines simplicity, small size, resolution and sensitivity. We have developed an inexpensive, small sized device for complete recording head and media testing. It consists of a commercially available piezoelectric quartz tuning fork, modified for applications to magnetic recording. By attaching a sharp magnetic probe to one of the tines of the tuning fork, this simple device can be used for testing and evaluation of the magneto-resistive read elements and the inductive write gaps of recording heads during the fabrication process. Furthermore, the device can be useful in imaging magnetic recording media. | ||
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| Point of response of magneto-resistive element of modern recording head. Scan size is 4 µ x 4 µ | Magnetic transitions of modern magnetic recording media. Scan size is 5 µ x 5 µ. |
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Presented at the 7th Joint MMM-Intermag Conference, San Francisco, CA, January 6-9, 1998. To be published in Conference Proceedings in the J. of Appl Phys. and IEEE Trans. on Mags.
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