MAGNETIC HEAD, MAGNETIC HEAD ASSEMBLY, AND MAGNETIC RECORDING/REPRODUCTION APPARATUS
First Claim
1. A magnetic head comprising:
- a main magnetic pole configured to apply a recording magnetic field to a recording magnetic medium;
an auxiliary magnetic pole configured to form a magnetic circuit together with the main magnetic pole; and
a spin torque oscillator formed between the main magnetic pole and the auxiliary magnetic pole,the spin torque oscillator includinga transmission-type spin transfer layer including a first perpendicular magnetization film formed on one of the main magnetic pole and the auxiliary magnetic pole, and a first interface magnetic layer formed on the first perpendicular magnetization film and containing at least one element selected from the group consisting of iron, cobalt, and nickel, and at least one element selected from the group consisting of chromium, vanadium, manganese, titanium, and scandium,a first interlayer formed on the transmission-type spin transfer layer,an oscillation layer formed on the first interlayer,a second interlayer formed on the oscillation layer, andan reflection-type spin transfer layer including a second perpendicular magnetization film formed on the second interlayer.
1 Assignment
0 Petitions
Accused Products
Abstract
According to one embodiment, a magnetic head includes a spin torque oscillator formed between a main magnetic pole and auxiliary magnetic pole. The spin torque oscillator includes a transmission-type spin transfer layer, first interlayer, oscillation layer, second interlayer, and reflection-type spin transfer layer. The transmission-type spin transfer layer includes a first perpendicular magnetization film and first interface magnetic layer. The first interface magnetic layer contains at least one element selected from Fe, Co, and Ni, and at least one element selected from Cr, V, Mn, Ti, and Sc. The reflection-type spin transfer layer includes a second perpendicular magnetization film.
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Citations
28 Claims
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1. A magnetic head comprising:
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a main magnetic pole configured to apply a recording magnetic field to a recording magnetic medium; an auxiliary magnetic pole configured to form a magnetic circuit together with the main magnetic pole; and a spin torque oscillator formed between the main magnetic pole and the auxiliary magnetic pole, the spin torque oscillator including a transmission-type spin transfer layer including a first perpendicular magnetization film formed on one of the main magnetic pole and the auxiliary magnetic pole, and a first interface magnetic layer formed on the first perpendicular magnetization film and containing at least one element selected from the group consisting of iron, cobalt, and nickel, and at least one element selected from the group consisting of chromium, vanadium, manganese, titanium, and scandium, a first interlayer formed on the transmission-type spin transfer layer, an oscillation layer formed on the first interlayer, a second interlayer formed on the oscillation layer, and an reflection-type spin transfer layer including a second perpendicular magnetization film formed on the second interlayer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A magnetic head comprising:
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a main magnetic pole configured to apply a recording magnetic field to a recording magnetic medium; an auxiliary magnetic pole configured to form a magnetic circuit together with the main magnetic pole; and a spin torque oscillator formed between the main magnetic pole and the auxiliary magnetic pole, the spin torque oscillator including a first interface magnetic layer formed on one of the main magnetic pole and the auxiliary magnetic pole, and containing at least one element selected from the group consisting of iron, cobalt, and nickel, and at least one element selected from the group consisting of chromium, vanadium, manganese, titanium, and scandium, a first interlayer formed on the first interface magnetic layer, an oscillation layer formed on the first interlayer, a second interlayer formed on the oscillation layer, and a second interface magnetic layer formed on the second interlayer. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A magnetic head comprising:
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a main magnetic pole configured to apply a recording magnetic field to a recording magnetic medium; an auxiliary magnetic pole configured to form a magnetic circuit together with the main magnetic pole; and a spin torque oscillator formed between the main magnetic pole and the auxiliary magnetic pole, the spin torque oscillator including a first interface magnetic layer formed on one of the main magnetic pole and the auxiliary magnetic pole, and containing at least one element selected from the group consisting of iron, cobalt, and nickel, and at least one element selected from the group consisting of chromium, vanadium, manganese, titanium, and scandium, a first interlayer formed on the first interface magnetic layer, an oscillation layer formed on the first interlayer, and a cap layer formed on the oscillation layer. - View Dependent Claims (18, 19, 20, 21, 22)
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23. A magnetic head assembly, comprising:
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a magnetic head including a main magnetic pole configured to apply a recording magnetic field to a recording magnetic medium, an auxiliary magnetic pole configured to form a magnetic circuit together with the main magnetic pole, and a spin torque oscillator formed between the main magnetic pole and the auxiliary magnetic pole, the spin torque oscillator including a transmission-type spin transfer layer including a first perpendicular magnetization film formed on one of the main magnetic pole and the auxiliary magnetic pole, and a first interface magnetic layer formed on the first perpendicular magnetization film and containing at least one element selected from the group consisting of iron, cobalt, and nickel, and at least one element selected from the group consisting of chromium, vanadium, manganese, titanium, and scandium, a first interlayer formed on the transmission-type spin transfer layer, an oscillation layer formed on the first interlayer, a second interlayer formed on the oscillation layer, and an reflection-type spin transfer layer including a second perpendicular magnetization film formed on the second interlayer; a head slider on which the magnetic head is mounted; a suspension on one end of which the head slider is mounted; and an actuator arm connected to the other end of the suspension.
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24. A magnetic head assembly comprising:
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a magnetic head comprising a main magnetic pole configured to apply a recording magnetic field to a recording magnetic medium, an auxiliary magnetic pole configured to form a magnetic circuit together with the main magnetic pole, and a spin torque oscillator formed between the main magnetic pole and the auxiliary magnetic pole, the spin torque oscillator including a first interface magnetic layer formed on one of the main magnetic pole and the auxiliary magnetic pole, and containing at least one element selected from the group consisting of iron, cobalt, and nickel, and at least one element selected from the group consisting of chromium, vanadium, manganese, titanium, and scandium, a first interlayer formed on the first interface magnetic layer, an oscillation layer formed on the first interlayer, a second interlayer formed on the oscillation layer, and a second interface magnetic layer formed on the second interlayer, the magnetic head assembly further comprising; a head slider on which the magnetic head is mounted; a suspension on one end of which the head slider is mounted; and an actuator arm connected to the other end of the suspension.
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25. A magnetic head assembly comprising:
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a magnetic head comprising a main magnetic pole configured to apply a recording magnetic field to a recording magnetic medium, an auxiliary magnetic pole configured to form a magnetic circuit together with the main magnetic pole, and a spin torque oscillator formed between the main magnetic pole and the auxiliary magnetic pole, the spin torque oscillator including a first interface magnetic layer formed on one of the main magnetic pole and the auxiliary magnetic pole, and containing at least one element selected from the group consisting of iron, cobalt, and nickel, and at least one element selected from the group consisting of chromium, vanadium, manganese, titanium, and scandium, a first interlayer formed on the first interface magnetic layer, an oscillation layer formed on the first interlayer, and a cap layer formed on the oscillation layer; the magnetic head assembly further comprising; a head slider on which the magnetic head is mounted; a suspension on one end of which the head slider is mounted; and an actuator arm connected to the other end of the suspension.
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26. A magnetic recording/reproduction apparatus comprising:
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a magnetic recording medium; and a magnetic head including a main magnetic pole configured to apply a recording magnetic field to the recording magnetic medium, an auxiliary magnetic pole configured to form a magnetic circuit together with the main magnetic pole, and a spin torque oscillator formed between the main magnetic pole and the auxiliary magnetic pole, the spin torque oscillator including a transmission-type spin transfer layer including a first perpendicular magnetization film formed on one of the main magnetic pole and the auxiliary magnetic pole, and a first interface magnetic layer formed on the first perpendicular magnetization film and containing at least one element selected from the group consisting of iron, cobalt, and nickel, and at least one element selected from the group consisting of chromium, vanadium, manganese, titanium, and scandium, a first interlayer formed on the transmission-type spin transfer layer, an oscillation layer formed on the first interlayer, a second interlayer formed on the oscillation layer, and an reflection-type spin transfer layer including a second perpendicular magnetization film formed on the second interlayer.
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27. A magnetic recording/reproducing apparatus, comprising:
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a magnetic recording medium; a main magnetic pole configured to apply a recording magnetic field to a recording magnetic medium; an auxiliary magnetic pole configured to form a magnetic circuit together with the main magnetic pole; and a spin torque oscillator formed between the main magnetic pole and the auxiliary magnetic pole, the spin torque oscillator including a first interface magnetic layer formed on one of the main magnetic pole and the auxiliary magnetic pole, and containing at least one element selected from the group consisting of iron, cobalt, and nickel, and at least one element selected from the group consisting of chromium, vanadium, manganese, titanium, and scandium, a first interlayer formed on the first interface magnetic layer, an oscillation layer formed on the first interlayer, a second interlayer formed on the oscillation layer, and a second interface magnetic layer formed on the second interlayer.
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28. A magnetic recording/reproducing apparatus, comprising:
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a magnetic recording medium; a main magnetic pole configured to apply a recording magnetic field to a recording magnetic medium; an auxiliary magnetic pole configured to form a magnetic circuit together with the main magnetic pole; and a spin torque oscillator formed between the main magnetic pole and the auxiliary magnetic pole, the spin torque oscillator including a first interface magnetic layer formed on one of the main magnetic pole and the auxiliary magnetic pole, and containing at least one element selected from the group consisting of iron, cobalt, and nickel, and at least one element selected from the group consisting of chromium, vanadium, manganese, titanium, and scandium, a first interlayer formed on the first interface magnetic layer, an oscillation layer formed on the first interlayer, and a cap layer formed on the oscillation layer.
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Specification