An understanding of the temperature of the GMR reader element used in disk drives during operating and non-operating condition is critical to optimize its performance. Self-heating and/or external heat sources will cause an increase in the temperature of the GMR sensor. In this work we concentrate on the self-heating effect due to bias current. Experiments that monitored the resistance change during very short current pulses showed that state-of-the-art GMR sensors have an extremely short time-constant that is less than 2 ns. This work is applicable to the current transients that the GMR head experiences during electrical crosstalk, electrostatic discharge and thermal asperities.
- Tribology Division
Thermal Effects and Self-Heating Time Constant for GMR Recording Heads
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Baril, L, Schreck, E, & Wallash, A. "Thermal Effects and Self-Heating Time Constant for GMR Recording Heads." Proceedings of the STLE/ASME 2003 International Joint Tribology Conference. Magnetic Storage Symposium: Frontiers of Magnetic Hard Disk Drive Tribology and Technology. Ponte Vedra Beach, Florida, USA. October 26–29, 2003. pp. 59-64. ASME. https://doi.org/10.1115/2003-TRIB-338
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