UNSHIELDED SPIN-VALVE SENSORS EXCHANGE-BIASED BY THIN TBCO LAYERS

Authors
LEAL JL OLIVEIRA NJ RODRIGUES LM SOUSA AT FREITAS PP
Citation
Jl. Leal et al., UNSHIELDED SPIN-VALVE SENSORS EXCHANGE-BIASED BY THIN TBCO LAYERS, IEEE transactions on magnetics, 30(6), 1994, pp. 3831-3833
Citations number
9
Categorie Soggetti
Engineering, Eletrical & Electronic","Physics, Applied
Journal title
IEEE transactions on magnetics → ACNP
ISSN journal
00189464
Volume
30
Issue
6
Year of publication
1994
Part
1
Pages
3831 - 3833
Database
ISI
SICI code
0018-9464(1994)30:6<3831:USSEBT>2.0.ZU;2-A
Abstract
Unshielded spin-valve sensors were fabricated with trackwidth W varyin g from 25 to 2 micron and height h ranging from 7 to 1 micron. Magneto resistance signals range from 7.5% to 3%. We find that heads with a ge ometry W/h greater than or equal to 4 are Barkhausen noise free. The e ffect of current density on sensor heating and output linearization is described. The pinned NiFe layer is exchange-biased to a 120 Angstrom thick TbCo layer, where the exchange field can be tuned by changing t he TbCo thickness.