Magnetoresistive transducer including CoFeZ soft magnetic layer
First Claim
1. A magnetoresistive transducer comprising:
- a multilayer having at least a soft magnetic layer and a conductive nonmagnetic layer alternately laminated therein, wherein said soft magnetic layer is a multilayer superposed structure including a (Coy Fe100-y)100-x Zx alloy layer, wherein Z represents boron, and x and y represent atomic fractions (at %), and an alloy layer containing at least Ni and Fe, said (Coy Fe100-y)100-x Zx alloy layer of said soft magnetic layer bordering on said nonmagnetic layer and having a face-centered cubic lattice structure with a d spacing smaller than a d spacing of a Coy Fe100-y alloy; and
a pair of electrodes formed on said multilayer for allowing a sense current to pass through said multilayer.
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Accused Products
Abstract
A magnetoresistive transducer includes a multilayer provided with a first soft magnetic layer, a conductive nonmagnetic layer, a second soft magnetic layer, and a biasing magnetic layer giving a magnetization of a predetermined direction to the second soft magnetic layer, in that order of superposition. The first soft magnetic layer is a multilayer superposed structure including a (Coy Fe100-y)100-x Zx alloy layer where Z represents boron and x and y represent atomic fractions (at %), and an alloy layer containing at least Ni and Fe. The (Coy Fe100-y)100-x Zx alloy layer ofthe first soft magnetic layer borders on the nonmagnetic layer and has a face-centered cubic lattice structure with a d spacing smaller than a d spacing of a Coy Fe100-y alloy. A pair of electrodes are formed on the multilayer for allowing a sense current to pass through the multilayer.
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Citations
28 Claims
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1. A magnetoresistive transducer comprising:
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a multilayer having at least a soft magnetic layer and a conductive nonmagnetic layer alternately laminated therein, wherein said soft magnetic layer is a multilayer superposed structure including a (Coy Fe100-y)100-x Zx alloy layer, wherein Z represents boron, and x and y represent atomic fractions (at %), and an alloy layer containing at least Ni and Fe, said (Coy Fe100-y)100-x Zx alloy layer of said soft magnetic layer bordering on said nonmagnetic layer and having a face-centered cubic lattice structure with a d spacing smaller than a d spacing of a Coy Fe100-y alloy; and a pair of electrodes formed on said multilayer for allowing a sense current to pass through said multilayer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 17, 18)
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8. A magnetoresistive transducer comprising:
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a multilayer provided with a first soft magnetic layer, a conductive nonmagnetic layer, a second soft magnetic layer, and a biasing magnetic layer giving a magnetization of a predetermined direction to said second soft magnetic layer, in that order of superposition, wherein said first soft magnetic layer is a multilayer superposed structure including a (Coy Fe100-y)100-x Zx alloy layer wherein Z represents boron and x and y represent atomic fractions (at %), and an alloy layer containing at least Ni and Fe, said (Coy Fe100-y)100-x Zx alloy layer of said first soft magnetic layer bordering on said nonmagnetic layer and having a face-centered cubic lattice structure with a d spacing smaller than a d spacing of a Coy Fe100-y alloy; and a pair of electrodes formed on said multilayer for allowing a sense current to pass through said multilayer. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 19, 20, 21, 22)
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23. A magnetic recording/reproducing drive, provided with:
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(a) a magnetic recording medium; and (b) a magnetoresistive transducer comprising, (1) a multilayer provided with a first soft magnetic layer, a conductive nonmagnetic layer, a second soft magnetic layer, and a biasing magnetic layer giving a magnetization of a predetermined direction to said second soft magnetic layer, in that order of superposition, said first soft magnetic layer being a multilayer superposed structure including a (Coy Fe100-y)100-x Zx alloy layer wherein Z represents boron and x and y represent atomic fractions (at %), and an alloy layer containing at least Ni and Fe, said (Coy Fe100-y)100-x Zx alloy layer of said first soft magnetic layer bordering on said nonmagnetic layer and having a face-centered cubic lattice structure with a d spacing smaller than a d spacing of a Coy Fe100-y alloy, and (2) a pair of electrodes formed on said multilayer for allowing a sense current to pass through said multilayer.
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24. A magnetic recording/reproducing drive provided with:
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(a) a magnetic recording medium; and (b) a magnetoresistive transducer comprising, (1) a multilayer having at least a soft magnetic layer and a conductive nonmagnetic layer alternately laminated therein, wherein said soft magnetic layer is a multilayer superposed structure including a (Coy Fe100-y)100-x Zx alloy layer, wherein Z represents boron and x and y represent atomic fractions (at %), and an alloy layer containing at least Ni and Fe, said (Coy Fe100-y)100-x Zx alloy layer of said soft magnetic layer bordering on said nonmagnetic layer and having a face-centered cubic lattice structure with a d spacing smaller than a d spacing of a (Coy Fe100-y alloy, and (2) a pair of electrodes formed on said multilayer for allowing a sense current to pass through said multilayer.
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25. A magnetoresistive transducer, comprising:
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a multilayer having at least a soft magnetic layer and a conductive nonmagnetic layer alternately laminated therein, wherein said soft magnetic layer is provided with at least a (Coy Fe100-y)100-x Cx alloy layer containing Co wherein x and y represent atomic fractions (at %), said (Coy Fe100-y)100-x Cx alloy layer of said soft magnetic layer bordering on said nonmagnetic layer and having a face-centered cubic lattice structure with a d spacing smaller than a d spacing of a (Coy Fe100-y) alloy; and a pair of electrodes formed on said multilayer for allowing a sense current to pass through said multilayer.
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26. A magnetoresistive transducer comprising:
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a multilayer provided with a first soft magnetic layer, a conductive nonmagnetic layer, a second soft magnetic layer, and a biasing magnetic layer giving a magnetization of a predetermined direction to said second soft magnetic layer, in that order of superposition,wherein said first soft magnetic layer is provided with at least a (Coy Fe100-y)100-x Cx alloy layer containing Co wherein x and y represent atomic fractions (at %), said (Coy Fe100-y)100-x Cx alloy layer of said first soft magnetic layer bordering on said nonmagnetic layer and having a face-centered cubic lattice structure with a d spacing smaller than a d spacing of a (Coy Fe100-y) alloy; and a pair of electrodes formed on said multilayer for allowing a sense current to pass through said multilayer.
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27. A magnetic recording/reproducing drive, provided with:
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(a) a magnetic recording medium; and (b) a magnetoresistive transducer comprising, (1) a multilayer provided with a first soft magnetic layer, a conductive nonmagnetic layer, a second soft magnetic layer, and a biasing magnetic layer giving a magnetization of a predetermined direction to said second soft magnetic layer, in that order of superposition, said first soft magnetic layer being provided with at least a (Coy Fe100-y)100-x Cx alloy layer containing Co wherein x and y represent atomic fractions (at %), said (Coy Fe100-y)100-x Cx alloy layer of said first soft magnetic layer bordering on said nonmagnetic layer and having a face-centered cubic lattice structure with a d spacing smaller than a d spacing of a (Coy Fe100-y) alloy, and (2) a pair of electrodes formed on said multilayer for allowing a sense current to pass through said multilayer.
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28. A magnetic recording/reproducing drive, provided with:
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(a) a magnetic recording medium; and (b) a magnetoresistive transducer comprising, (1) a multilayer having at least a soft magnetic layer and a conductive nonmagnetic layer alternately laminated therein, wherein said soft magnetic layer is provided with at least a (Coy Fe100-y)100-x Cx alloy layer containing Co wherein x and y represent atomic fractions (at % ), said (Coy Fe100-y)100-x Cx alloy layer of said first soft magnetic layer bordering on said nonmagnetic layer and having a face-centered cubic lattice structure with a d spacing smaller than a d spacing of a (Coy Fe100-y), and (2) a pair of electrodes formed on said multilayer for allowing a sense current to pass through said multilayer.
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Specification