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US 6,477,020 B1Granted
Magneto-resistive head and magnetic recording and reproducing apparatus
AssigneeFujitsu Limited
InventorsKenichi Aoshima, Hitoshi Kanai
Life of this patent
Estimating the term…
Abstract
A magneto-resistive head includes a stabilizing bias layer which applies a magnetization stabilizing bias field on a magneto-resistive layer of a magneto-resistive element, and a ferromagnetic underlayer which forms an underlayer with respect to the stabilizing bias layer. The ferromagnetic underlayer is made of Fe and has a film thickness in a range of 1.3 to 2.5 nm.
Claims13
A magneto-resistive head comprising:
- a stabilizing bias layer which applies a magnetization stabilizing bias field on a magneto-resistive layer of a magneto-resistive element;
- and
- a ferromagnetic underlayer which forms an underlayer with respect to said stabilizing bias layer,
- said ferromagnetic underlayer being made of Fe and having a film thickness in a range of 1.3 to 2.5 nm.
1 more element
A magneto-resistive head comprising:
- a stabilizing bias layer which applies a magnetization stabilizing bias field on a magneto-resistive layer of a magneto-resistive element;
- and
- a ferromagnetic underlayer which forms an underlayer with respect to said stabilizing bias layer,
- said ferromagnetic underlayer being made of a Fe alloy which is added with at least one element selected from the group consisting of Co, Ni, Cr, Nb, Mo, Ta, V and W, and having a film thickness in a range of 2.5 to 4.9 nm.
1 more element
A magneto-resistive head comprising:
- a stabilizing bias layer which applies a magnetization stabilizing bias field on a magneto-resistive layer of a magneto-resistive element;
- and
- a ferromagnetic underlayer which forms an underlayer with respect to said stabilizing bias layer,
- said ferromagnetic underlayer being made of a Fe alloy which is added with at least one element selected from the group consisting of Pt Pd, Ir, Rh, Ru and Au.
1 more element
A magneto-resistive head comprising:
- a stabilizing bias layer which applies a magnetization stabilizing bias field on a magneto-resistive layer of a magneto-resistive element;
- and
- a ferromagnetic underlayer which forms An underlayer with respect to said stabilizing bias layer,
- said ferromagnetic underlayer being de of a material selected from the group consisting of FeCo alloy, FeCoNi alloy and FeNi alloy, said material being added with at least one element selected from the group consisting of Pt, Pd, Ir, Rh, Ru and Au.
1 more element
A magnetic recording and reproducing apparatus comprising:
- a magneto-resistive head comprising:
- a stabilizing bias layer which applies a magnetization stabilizing bias field on a magneto-resistive layer of a magneto-resistive element;
- and
- a ferromagnetic underlayer which forms an underlayer with respect to said stabilizing bias layer,
- said ferromagnetic underlayer being made of Fe and having a film thickness in a range of 1.3 to 2.5 nm.
2 more elements
A magnetic recording and reproducing apparatus comprising:
- a magneto-resistive head comprising:
- a stabilizing bias layer which applies a magnetization stabilizing bias field on a magneto-resistive layer of a magneto-resistive element;
- and
- a ferromagnetic underlayer which forms an underlayer with respect to said stabilizing bias layer,
- said ferromagnetic underlayer being made of a Fe alloy which is added with at least one element selected from the group consisting of Co, Ni, Cr;
- Nb, Mo, Ta, V and W, and having a film thickness in a range of 2.5 to 4.9 nm.
3 more elements
A magnetic recording and reproducing apparatus comprising:
- a magneto-resistive head comprising:
- a stabilizing bias layer which applies a magnetization stabilizing bias field on a magneto-resistive layer of a magneto-resistive element;
- and
- a ferromagnetic underlayer which form an underlayer with respect to said stabilizing bias layer,
- said ferromagnetic underlayer being made of a Fe alloy which is added with at least one element selected from the group consisting of Pt, Pd, Ir, Rh, Ru and Au.
2 more elements
A magnetic recording and reproducing apparatus comprising:
- a magneto-resistive head comprising:
- a stabilizing bias layer which applies a magnetization stabilizing bias field on a magneto-resistive layer of a magneto-resistive element;
- and
- a ferromagnetic underlayer which forms an underlayer with respect to said stabilizing bias layer,
- said ferromagnetic underlayer being made of a material selected from the group consisting of FeCo alloy, FeCoNi alloy and FeNi alloy, said material being added with at least one element selected from the group consisting of Pt, Pd, Ir, Rh, Ru and Au.
2 more elements
Dependencies are inferred from the claim text.