66results about "Shielding heads" patented technology

The present embodiments relate to a perpendicular magnetic recording (PMR) write head with a Two Tunable bias branch design that can electrical separate a WS1 / PP3 and a SS / LS to form two tunable bias branches. A write head can include a main pole, a write gap(WG) disposed adjacent to the main pole, and a hot seed (HS) layer connected to the WG. The PMR write head can also include a trailing shield, a side shield and a leading shield. Two tunable bias branches can be formed to electrically separate the trailing shield and the side and leading shields. A first branch can include a first electrical path between the main pole and the trailing shield. The tunable bias branches can also include a second branch forming a second electrical path between the main pole and the side and leading shields.

A spin injection assisted magnetic recording structure is disclosed wherein a ferromagnetic (FM) layer and at least one spin preservation (SP) layer are formed between a main pole (MP) trailing side and a write shield (WS). Current (Ia) flows between the MP and WS, or is injected into the FM layer. As a result, the spin polarized electrons from the FM layer, which flow across one or two SP layers to generate a magnetization that enhances one or both of a local WS magnetization and return field, and a local MP magnetization and write field, respectively. A lead to the FM layer may be stitched to enable lower resistance and improve reliability. The FM layer may be recessed from the ABS to allow more overlap with the SP layer for lower current density while maintaining performance. Higher linear density and area density capability, and better reliability are achieved.

To provide a magnetic head and a magnetic recording device capable of improving recording density. According to an embodiment, a magnetic head includes a pole, a shield, and a non-magnetic layer. The non-magnetic layer is disposed between the pole and the shield. The non-magnetic layer is in contact with the pole and the shield. The non-magnetic layer contains at least one first element selected from Cu, Au, Cr, V, Al, and Ag.

Provided is a magnetic recording device capable of achieving an increase in recording density. According to an embodiment, the magnetic recording device includes a magnetic head and a control section. The magnetic head includes a first magnetic pole, a magnetic element, and a coil, and the magnetic element includes a magnetic layer. The control section is electrically connected to the magnetic element and the coil. The control section is capable of supplying a recording current to the coil and an element current to the magnetic element. The recording current includes a first period of a first polarity, a second period of a second polarity different from the first polarity, a third period of transition from the first period to the second period, and a fourth period of transition from the second period to the first period. The element current includes a direct current component and an alternating current component. The alternating current component in the first period is the same as the alternating current component in the second period, the alternating current component in the third period, and the alternating current component in the fourth period.

The present disclosure generally relates to spin-orbit torque (SOT) devices comprising a bismuth antimony (BiSb) layer. The SOT devices further comprises a first shield, a BiSb layer disposed over the first shield (S1), a free layer (FL) disposed over the BiSb layer, and a second shield (S2) disposed over the FL. The S1, the FL, and the S2 are disposed at a media facing surface (MFS). The BiSb layer is recessed from the MFS a first distance of about 5 nm to about 20 nm. The FL has a length greater than the first distance. A notch and / or an insulation layer is disposed adjacent to the BiSb layer at the MFS. Current may be configured to flow vertically through the S2 to the FL, and horizontally from the FL to the BiSb layer. Current may be configured to flow vertically through the S2 to the S1.

Provided are devices for use in a magnetic tape head, a magnetic tape head, and methods for forming the same. A device includes a chiplet including at least one of a reader and a writer. The device also includes an electromagnetic interference (EMI) shield embedded in the chiplet. The EMI shield is configured to inhibit electromagnetic interference during operation of the at least one of the reader and the writer.

A magnetic recording writer is disclosed. The writer can include a main pole and side shields that have a first sidewall portion proximate to the ABS facing the curved sidewalls of the main pole and formed substantially conformal to the curved sidewalls up to a height of about 10 to 200 nm above the ABS, a second sidewall portion proximate to the corner connecting the first flared sidewalls and the curved sidewalls of the main pole and formed substantially conformal to the curved sidewalls up to the height of about 10 to 200 nm above the ABS, a third sidewall portion connected to the second sidewall portion and formed substantially conformal to the first flared sidewall, and a fourth sidewall portion connected to the third sidewall portion and formed substantially parallel to the ABS; and a side gap separating the main pole from each side shield.

According to one embodiment, a magnetic head includes first and second magnetic poles, and a stacked body provided between the first and second magnetic poles. The stacked body includes a first magnetic layer, a second magnetic layer provided between the first magnetic layer and the second magnetic pole, a first nonmagnetic layer provided between the first and second magnetic layers, a second nonmagnetic layer provided between the second magnetic layer and the second magnetic pole, and a third nonmagnetic layer provided between the first magnetic pole and the first magnetic layer. The first magnetic layer includes a first element including at least one of Fe, Co, or Ni. The second magnetic layer includes (Fe100-xCox)100-yEy. A second element E includes at least one selected from the group consisting of Cr, V, Mn, Yi, and Sc. The first magnetic layer does not include the second element.

Aspects of the present disclosure generally relate to magnetic recording heads of magnetic recording devices. A read head includes a first reader, an insulating separation layer, and a second reader disposed above the insulating separation layer. The second reader includes a magnetic seed layer and a cap layer. The second reader includes a first upper free layer disposed between the magnetic seed layer and the cap layer, and a second upper free layer disposed between the first upper free layer and the cap layer. The second reader includes a barrier layer. In one embodiment, the second reader includes an anti-ferromagnetic (AFM) layer disposed between the magnetic seed layer and the insulating separation layer to pin the magnetic seed layer.

To provide a magnetic recording device that enables improved recording density. [Solution] According to the embodiment, the magnetic recording device includes a magnetic head and a control unit. The magnetic head includes first and second magnetic poles, a magnetic element, and a coil. The control unit is configured to switch between performing a first operation and a second operation. In the first operation, the control unit supplies a first recording element current to the magnetic element. In the second operation, the control unit supplies a second recording element current to the magnetic element. The first recording element current is less than or equal to a first current value. The second recording element current exceeds the first current value.

A dual free layer (DFL) read head or reader typically has side bumps in a signal amplitude and cross-track profile. The side bump is an additional magnetic signal of the reader in response to the magnetic field of the limited thickness magnetic medium. The side bump has a magnitude much lower than the main magnetic signal of the reader and is offset from the center of the track in a cross-track direction. The presence of the side bumps indicates that the magnetic signal of the reader is out of phase. When there is a pair of side bumps (one on each side of the center of the track), the side bumps typically and ideally should be offset symmetrically in the cross-track direction, which would otherwise negatively impact reader performance. To achieve offset symmetry, synthetic antiferromagnetic (AFM) (SAF) shielding may be used, the magnetic moment of the soft bias layer may be adjusted, and the spacing between the free layer and the soft bias layer of the DFL read head may also be adjusted.

Provided are a magnetic head and a magnetic recording device capable of achieving an increase in recording density. According to an embodiment, the magnetic head includes a first and a second magnetic pole, and a laminate disposed between the first and second magnetic poles. The laminate includes a first magnetic layer, a second magnetic layer disposed between the first magnetic layer and the second magnetic pole, a first non-magnetic layer disposed between the first magnetic layer and the second magnetic layer, a second non-magnetic layer disposed between the second magnetic layer and the second magnetic pole, and a third non-magnetic layer disposed between the first magnetic pole and the first magnetic layer. The first magnetic layer contains a first element including at least one of Fe, Co, and Ni. The second magnetic layer contains (Fe 100‑x Co x ) 100‑y E y (10 atm% ≤ x ≤ 50 atm%, 10 atm% ≤ y ≤ 90 atm%). The second element E includes at least one selected from the group consisting of Cr, V, Mn, Ti, and Sc. The first magnetic layer does not contain the second element, or the concentration of the second element in the first magnetic layer is lower than the concentration of the second element in the second magnetic layer.

A dual free layer (DFL) read head or reader oftentimes has a sidebump in a signal amplitude vs. cross-track profile plot. The sidebump is a magnetic signal of the reader in response to the magnetic field of magnetic media with finite thickness. The sidebump magnitude is far below the main magnetic signal of the reader and is offset from the center of the track in the cross-track direction. When two sidebumps are present (one on each side of the center of the track), the sidebump should generally and ideally be symmetrically offset in the cross-track direction else there is a negative impact on reader performance. To obtain offset symmetry, a synthetic antiferromagnetic (SAF) shield may be used, magnetic moments of soft bias layers can be adjusted, and spacing between the free layers of the DFL read head and the layers of the soft bias can also be adjusted.

To provide a magnetic sensor, a magnetic head, and a magnetic recorder, which improve resolution.SOLUTION: A magnetic sensor 70A comprises a first shield 41 to a sixth shield 46, first and second magnetic layers 11 and 12, and a first member 31. The first magnetic layer 11 is between the third shield 43 and the fourth shield 44. The second magnetic layer 12 is between the first magnetic layer 11 and the second shield 42 and is between the fifth shield 45 and the sixth shield 46. The second magnetic layer 12 is electrically connected to the fifth shield 45 and the sixth shield 46. The first member 31 includes a first region 31a and a second region 31b. The first region 31a is provided between the third shield 43 and the first magnetic layer 11. The second region 31b is provided between the first magnetic layer 11 and the fourth shield 44.SELECTED DRAWING: Figure 1

To provide a magnetic recording device that enables improved recording density. [Solution] According to the embodiment, the magnetic recording device includes a magnetic head and a control unit. The magnetic head includes first and second magnetic poles, a magnetic element, a coil, a first terminal, and a second terminal. The control unit is configured to perform a first operation. In the first operation, the control unit is configured to supply a recording element current to the magnetic element and a recording coil current to the coil. The absolute value of the recording coil current is less than or equal to the first coil current value corresponding to the first peak.

The present disclosure provides a magnetic recording device capable of improving recording density. According to one embodiment, a magnetic recording apparatus includes a magnetic head and a control unit. The magnetic head includes a first magnetic pole, a second magnetic pole, a magnetic element, a coil, a first terminal, and a second terminal. The control unit is configured to perform a first operation. In the first operation, the control unit supplies a recording-time element current to the magnetic element and supplies a recording-time coil current to the coil. The absolute value of the coil current during recording is equal to or less than a first coil current value corresponding to the first peak.

A microwave assisted magnetic recording (MAMR) write head includes a main pole and a trailing shield. A spin torque oscillator device is disposed between the main pole and the trailing shield. The spin torque oscillator device includes a free layer. A trailing shield hot seed layer is disposed between the spin torque oscillator device and the trailing shield. The trailing shield hot seed layer includes a magnetic material doped with a rare earth element. In certain embodiments, the trailing shield hot seed layer includes the rare earth element in an atomic percent content from about 2% to about 10% atomic percent. In certain embodiments, the trailing shield hot seed layer has an intrinsic damping from about 0.02 to about 0.2.

The present embodiments relate to a perpendicular magnetic recording (PMR) write head with an STO element and configured to direct an electric current between elements of the write head. A first example embodiment describes a perpendicular magnetic recording (PMR) write head. The PMR write head can include a main pole comprising a tip portion disposed adjacent to an air bearing surface (ABS) and is configured to interact with a magnetic recording medium. The PMR write head can also include a spin torque oscillator (STO) element disposed adjacent to the main pole. The PMR write head can also include a side shield layer with a portion of the side shield layer disposed adjacent to the ABS. The PMR write head can also include a metallic side gap layer disposed between the main pole and the side shield layer.

The present disclosure generally relates to spin-orbital torque (SOT) differential reader designs. The SOT differential reader is a multi-terminal device that comprises a first shield, a first spin hall layer, a first free layer, a gap layer, a second spin hall layer, a second free layer, and a second shield. The gap layer functions as an electrode and is disposed between the first spin hall layer and the second spin hall layer. Electrical lead connections are located about the first spin hall layer, the second spin hall layer, the gap layer, the first shield, and / or the second shield. The electrical lead connections facilitate the flow of current and / or voltage from a negative lead to a positive lead. The positioning of the electrical lead connections and the positioning of the SOT differential layers improves reader resolution without decreasing the shield-to-shield spacing (i.e., read-gap).

The present disclosure relates to a read head apparatus for a magnetic storage device, such as a tape drive (e.g., a tape deck), and a method of forming the read head apparatus. In one embodiment, a read head for a magnetic storage device includes a lower shield, an upper shield, one or more lower leads, and a plurality of upper leads. The read head includes a plurality of read sensors, each of the plurality of read sensors including a first antiferromagnetic (AFM) layer. The read head includes a plurality of soft bias side shields disposed between and outside the plurality of read sensors. The read head includes a plurality of second AFM layers disposed below the plurality of soft bias side shields along a downtrack direction.

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