Thermal asperity of TMR heads for removable disk drives

Keishi Ohashi*, Akinobu Sato, Kunihiko Ishihara, Takao Matsubara, Tsutomu Mitsuzuka, Hisanao Tsuge, Nobuyuki Ishiwata

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

4 Citations (Scopus)


The thermal asperity of the tunneling magnetoresistive (TMR) head was studied using Zip-type flexible media, and compared with that of the anisotropic magnetoresistive (AMR) head. The examined head had a shielded structure with the TMR element close to the air bearing surface. Nevertheless, it generated relatively small thermal asperity even when the mechanical spacing between the head and medium was less than 20 nm, at which large and frequent thermal asperity was observed when the AMR head was used. Such relatively small thermal asperity of the TMR head is attributed mainly to the small low-temperature coefficient of the electric resistivity of the TMR element.

Original languageEnglish
Pages (from-to)1919-1921
Number of pages3
JournalIEEE Transactions on Magnetics
Issue number4 I
Publication statusPublished - 2001 Jul
Externally publishedYes
Event8th Joint Magnetism and Magnetic Materials -International Magnetic Conference- (MMM-Intermag) - San Antonio, TX, United States
Duration: 2001 Jan 72001 Jan 11


  • Flexible disk
  • Removable disk drive
  • Thermal asperity
  • Tunneling magnetoresistive head

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering


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