22results about "Heads using thin films" patented technology

Embodiments of the invention provide a write head for perpendicular recording in which the magnetic field intensity applied at a read element is reduced with larger write-field gradients and the distance between a write element and a read element is small. In one embodiment, a pair of magnetic bodies for shielding a read element are provided on the leading and trailing sides of the read element respectively and whichever one of the two shields is the longer in the length from the air bearing surface is shorter than the length up to the back contact position PBK at which a main pole and an auxiliary pole are connected.

The purpose of this disclosure is to provide a heat-assisted magnetic recording (HAMR) writer head with high magnetic field reliability and high accuracy. [Solution] Disclosed are a writer head for a heat-assisted magnetic recording device and a method for manufacturing a writer head. The writer head comprises a plurality of layers, including a waveguide cutoff layer, a waveguide layer, a near-field transducer layer, a heat sink layer, and a peg layer. Each layer has a tapered angle near the air bearing surface. The writer head further has a principal axis pole adjacent to an optical component having a similar tapered angle near the air bearing surface.

To provide a servo writer that reduces the number of cartridges to be discarded.SOLUTION: A servo writer 210 for a cartridge 10 includes: a traveling portion that feeds out a tape-shaped magnetic recording medium (magnetic tape MT) from the cartridge and winds the feed magnetic recording medium to make the magnetic recording medium travel; a demagnetizing magnet 214 that erases a first servo pattern formed on the traveling magnetic recording medium; a servo signal writing head 215 that writes a servo signal onto the traveling magnetic recording medium after the first servo pattern is erased and forms a second servo pattern; and a control device that controls the head to write the servo signal during at least one of acceleration and deceleration traveling periods of the magnetic recording medium and forms the second servo pattern that does not satisfy the standard on the magnetic recording medium.SELECTED DRAWING: Figure 8

Writer head products for heat-assisted magnetic recording devices and methods of making the same are disclosed. The writer heads include multiple layers including a waveguide blocking layer, a waveguide layer, a near-field transducer layer, a heat sink layer, and a peg layer. The peg layer may comprise a small triangular section that extends from an air-bearing surface into the optical component. The writer heads further include a main magnetic pole adjacent to the optical component.

To provide a magnetic recording device capable of improving recording density.SOLUTION: A magnetic recording device 210 includes a magnetic head 110 and a control unit 75. The magnetic head includes a first magnetic pole 31, a second magnetic pole 32, a magnetic element 20 provided between the first magnetic pole and the second magnetic pole, a first terminal T1 electrically connected to the first magnetic pole, a second terminal T2 electrically connected to the second magnetic pole, and a coil 30c. The control unit is electrically connected to the first terminal, the second terminal, and the coil. One end of the magnetic element is electrically connected to the first magnetic pole. The other end of the magnetic element is electrically connected to the second magnetic pole. The control unit can perform a recording operation. In the recording operation, the control unit supplies a recording current to the coil while applying an element voltage of a first voltage or more and a second voltage or less between the first terminal and the second terminal.SELECTED DRAWING: Figure 1

To provide a magnetic tape which may contribute to operational stability improvement of a drive during recording and / or reproduction after prolonged storage.SOLUTION: A magnetic tape is provided, comprising a non-magnetic support body and a magnetic layer containing ferromagnetic powder and having a 1-bromonaphthalene contact angle in a range of 45.0° to 55.0°, inclusive, as measured on a surface thereof and a standard deviation σ of the angle of 1.0° or less in a width direction of the surface thereof. Also provided are a magnetic tape cartridge and a magnetic tape device that comprise the magnetic tape.SELECTED DRAWING: None

A recording head using the anomalous Hall effect includes a ferromagnetic body 10 configured to exhibit the anomalous Hall effect, first and second current terminals (I+, I-) configured to supply a current to the ferromagnetic body 10, first and second voltage terminals (V+, V-) configured to detect a voltage generated in the ferromagnetic body 10, and a resistance adjustment layer provided between each of the first and second current terminals and the ferromagnetic body or between each of the first and second voltage terminals and the ferromagnetic body; the resistance adjustment layer includes a high-resistance region and a low-resistance region; and the low-resistance region electrically connects each of the first and second current terminals and the ferromagnetic body or electrically connects each of the first and second voltage terminals and the ferromagnetic body.

To provide a magnetic tape which may contribute to operational stability improvement of a drive during recording and / or reproduction after prolonged storage.SOLUTION: A magnetic tape is provided, comprising a non-magnetic support body and a magnetic layer containing ferromagnetic powder and having a friction coefficient of 0.35 or less as measured on a base material portion of a surface thereof and a standard deviation σ of the friction coefficient of 0.05 or less in a width direction of the surface thereof. Also provided are a magnetic tape cartridge and a magnetic tape device that comprise the magnetic tape.SELECTED DRAWING: None

The present invention provides a write head having an asymmetrical side gap (SG) that offers a narrower side gap (SG) width while mitigating any limitations or constraints on write capability that may arise from reducing the side gap SG. [Solution] In the asymmetrical writing head 600, the main pole 602 is positioned offset with respect to the central axis A1 of the writing head such that it is closer to the first SS 606A portion than to the second side shield (SS) 606B portion. The asymmetrical design can be achieved using an ion-beam etching (IBE) or ion-beam deposition (IBD) process.

To provide a magnetic recorder capable of improving the recording density.SOLUTION: According to an embodiment, a magnetic recorder includes a magnetic head and a control unit. The magnetic head includes: a first magnetic pole; a second magnetic pole; a magnetic element which is provided between the first magnetic pole and the second magnetic pole; and a coil. The control unit is electrically connected to the magnetic element and the coil. The control unit enables recording operation. The control unit supplies a recording current to the coil while applying an element voltage to the magnetic element in the recording operation. An alternating magnetic field is generated from the magnetic element to which the element voltage has been applied. Differential resistance of electric resistance of the magnetic element when the voltage applied to the magnetic element while the recording current is supplied to the coil is changed turns into a first differential resistance peak when the applied voltage is a first voltage. The differential resistance turns into a second differential resistance peak when the applied voltage is a second voltage. The second voltage is higher than the first voltage. The element voltage is higher than the first voltage and less than the second voltage.SELECTED DRAWING: Figure 1

Writer head products for heat-assisted magnetic recording devices and methods of making the same are disclosed. The writer heads include multiple layers including a waveguide blocking layer, a waveguide layer, a near-field transducer layer, a heat sink layer, and a peg layer. The peg layer may comprise a small triangular section that extends from an air-bearing surface into the optical component. The writer heads further include a main magnetic pole adjacent to the optical component.

To provide a magnetic tape which may contribute to operational stability improvement of a drive during recording and / or reproduction after prolonged storage.SOLUTION: A magnetic tape is provided, comprising a non-magnetic support body and a magnetic layer containing ferromagnetic powder and having a water contact angle in a range of 95° to 105°, inclusive, as measured on a surface thereof and a standard deviation σ of the water contact angle of 1.0° or less in a width direction of the surface thereof. Also provided are a magnetic tape cartridge and a magnetic tape device that comprise the magnetic tape.SELECTED DRAWING: None

This disclosure aims to provide a heat-assisted magnetic recording (HAMR) writer head with increased areal density capacity, improved writing efficiency, and enhanced reliability. [Solution] Disclosed are a writer head for a heat-assisted magnetic recording device and a method for manufacturing a writer head. The writer head comprises several layers, including a waveguide cutoff layer, a waveguide layer, a near-field transducer layer, a heat sink layer, and a peg layer. The peg layer comprises small triangular portions extending from the air bearing surface to the optical component. The writer head further comprises a principal pole adjacent to the optical component.

To provide a magnetic tape which may contribute to operational stability improvement of a drive during recording and / or reproduction after prolonged storage.SOLUTION: A magnetic tape is provided, comprising a non-magnetic support body and a magnetic layer containing ferromagnetic powder and having an arithmetic average roughness Ra of 1.5 nm or less as measured on a surface thereof and a standard deviation σ of Ra of 0.20 nm or less in a width direction of the surface thereof. Also provided are a magnetic tape cartridge and a magnetic tape device that comprise the magnetic tape.SELECTED DRAWING: None

The objective is to provide a magnetic recording device that can prevent problems caused by buildup products and improve recording density. [Solution] According to the embodiment, the magnetic recording device comprises a disk-shaped recording medium having a recording surface coated with a lubricant, a magnetic head including a recording element, a light source, and a light-emitting element that irradiates light onto the recording surface of the recording medium, a light source control circuit that controls the drive current value of the light source, a cleaning execution circuit that performs a cleaning operation to remove buildup products adhering to the magnetic head, and a controller including a setting circuit that sets the cleaning interval for performing the cleaning operation.

Writer head products for heat-assisted magnetic recording devices and methods of making the same are disclosed. The writer heads include multiple layers including a waveguide blocking layer, a waveguide layer, a near-field transducer layer, a heat sink layer, and a peg layer. Each of the layers may comprise a tapered angle near an air-bearing surface. The writer heads further include a main magnetic pole adjacent to the optical component including the same tapered angle near the air-bearing surface.

Described are methods of forming write poles using physical vapor deposition or chemical vapor deposition of FeCoX magnetic material alloys, where the X element is selected to produce properties such as oxidation resistance, corrosion resistance, and sufficiently high magnetic moment. Once an initial portion of the write pole is formed by depositing the FeCoX alloy, the remainder of the write pole may be formed by electroplating an FeCo-based alloy using the deposited FeCoX as an electroplating template, or by deposition of additional FeCoX material to form the bulk of the write pole.

To provide a magnetic tape which may contribute to operational stability improvement of a drive during recording and / or reproduction after prolonged storage.SOLUTION: A magnetic tape is provided, comprising a non-magnetic support body and a magnetic layer containing ferromagnetic powder and having an AlFeSil abrasion value in a range of 20 to 50 μm, inclusive, as measured on a surface thereof and a standard deviation σ of the AlFeSil abrasion value of 5.0 μm or less as derived in a width direction of the surface thereof. Also provided are a magnetic tape cartridge and a magnetic tape device that comprise the magnetic tape.SELECTED DRAWING: None

The present disclosure generally relate to a tape drive including a tape head assembly comprising a tape head. The tape head assembly further comprises a substrate having a leading edge (LE), a trailing edge (TE), and a first media facing surface (MFS) disposed between the leading and trailing edges, and a recession disposed in the substrate, the recession being recessed from the first MFS. The tape head is disposed in the recession. The tape head has a second MFS that extends above the first MFS by a distance of about 20 nm to about 200 nm. The LE comprising a first step and a second step. The first and second steps, the recession, and the extended tape head enable a tape of the tape drive to be spaced from the substrate and tape head as the tape moves over the tape head assembly during operation.