Measurements of Asperity Temperatures of a Read/Write Head Slider Bearing in Hard Magnetic Recording Disks

Abstract

An infrared temperature measurement system was used to measure hot spots in a magnetic head rigid disk interface. The system employed the spectral distribution as well as intensity of sampled radiation to determine both the temperature and effective area of microscopic sources at elevated temperature. Flash temperatures between particulate and thin-film rigid disks and a simulated transparent sapphire slider at various operating conditions were measured.