Sensitivity of an active head using NiFe/Al2O3 multilayered films

H. Iwasaki, J. Akiyama

Research output: Contribution to journalArticle

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Abstract

The sensitivity of a magnetic readout head using induced RF permeability changes in NiFe/Al2 O3 multilayered films (an active head) was investigated by measuring the output voltage response to magnetic fields, taking the film thickness and width as parameters. It was found that all thick multilayered films studied had low coercivity and high permeability at frequencies of less than 50 MHz. They exhibited a small decrease in induced RF permeability around 600 MHz, even when the film width was reduced to 10 μm. Sensitivity of all thick films rose by more than ten times compared with NiFe single-layered films. The dependence of head sensitivity on the soft magnetic properties and high-frequency permeability of the multilayered film is discussed.

Original languageEnglish
Pages (from-to)97-106
Number of pages10
JournalIEEE Translation Journal on Magnetics in Japan
Volume4
Issue number2
DOIs
Publication statusPublished - 1989 Feb
Externally publishedYes

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Thick films
Coercive force
Film thickness
Magnetic properties
Magnetic fields
Electric potential

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Sensitivity of an active head using NiFe/Al2O3 multilayered films. / Iwasaki, H.; Akiyama, J.

In: IEEE Translation Journal on Magnetics in Japan, Vol. 4, No. 2, 02.1989, p. 97-106.

Research output: Contribution to journalArticle

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