High-resolution measurement of temperature distribution in head coil and air bearing surface

• Published in: IEEE transactions on magnetics Vol. 39; no. 5; pp. 2411 - 2413
• Main Authors: Junguo Xu, Tokuyama, M., Kurita, M., Maruyama, Y.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: New York, NY IEEE 01.09.2003; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Applied sciences; Coils; Disk recording; Electrical resistance measurement; Electronics; Exact sciences and technology; Magnetic devices; Magnetic heads; Magnetic recording; Magnetic thin film devices: magnetic heads (magnetoresistive, inductive, etc.); domain-motion devices, etc; Magnetism; Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices; Surface resistance; Temperature distribution; Temperature measurement; Testing; Thermal expansion; Temperature measurement; Temperature distribution; Induced current; thermal protrusion; Recording head; Air bearing surface; Magnetic head; head coil; Eddy current; Experimental study; Spatial resolution; Air cushion
• ISSN: 0018-9464; 1941-0069
• DOI: 10.1109/TMAG.2003.816421

We have measured the temperature distribution in a head coil and air bearing surface at high-spatial resolution. It was found that an eddying current induced by high-frequency write-current significantly increases the temperature and also changes the temperature distribution. Measurement also revealed that an improved head structure would be a good way to reduce temperature increase and thermal protrusion in the head.