Thin film thermocouple sensors for measurement of contact temperatures during slider asperity interaction on magnetic recording disks

Author

Schreck, E. ; Fontana, R.E., Jr. ; Singh, G.P.

Author_Institution

IBM Almaden Res. Center, San Jose, CA, USA

Volume

28

Issue

5

fYear

1992

fDate

9/1/1992 12:00:00 AM

Firstpage

2548

Lastpage

2550

Abstract

Thin-film thermocouple sensors have been fabricated on a magnetic recording slider. Both the sensors and the reference junctions are located on the air bearing surface of the slider. The effective size of the junctions is 4 μm, and response time is faster than 0.5 μs. The sensitivity of these thermocouples is measured to be 7 μV/°C. The thermocouple signals obtained at the slider asperity contacts show a temperature rise of 1-5°C. Incorporating the sensor dimensions and assuming asperities of 0.5 μm width, the actual temperatures are estimated to be in the range of 90-450°C

Keywords

hard discs; magnetic heads; mechanical contact; temperature measurement; thermocouples; 0.5 mus; 90 to 450 degC; air bearing surface; contact temperatures; magnetic recording disks; reference junctions; response time; slider asperity interaction; temperature rise; thin film thermocouple sensors; Hard disks; Magnetic recording; Magnetic sensors; Nickel; Rails; Sensor phenomena and characterization; Temperature measurement; Temperature sensors; Thermal sensors; Thin film sensors;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.179552

Filename

179552