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The Determination of Flash Temperature in Intermittent Magnetic Head/Disk Contacts Using Magnetoresistive Heads: Part II—Experimental Investigation

The flash temperature during intermittent head/disk contacts was measured using specially fabricated magnetoresistive heads. Microasperities were intentionally created on disk substrates, and ZrO 2 was sputtered on disc surfaces as overcoat. It was found that with a disk spinning speed of 20 mp/s, flash temperature could reach 50 to 100 o C for transient contact (head was moving in disk radial direction), but less than 40 o C for dwell on track contact (head was stationary)