45results about "Magnetic recording" patented technology

Various devices, apparatuses, methods, and media for heat assisted magnetic recording (HAMR) are disclosed that, in some examples, provide HAMR media with a platinum doped CO-BN capping layer. In one example, the HAMR medium includes a CoPtBN capping layer on a magnetic recording layer having Pt in a range of 5 atomic percent (at.%) to 12 at.%. The atomic ratio of Co to Pt in the CoPtBN may be in the range of, for example, 5 to 13. The BN in the CoPtBN may comprise, for example, from 22 mol% to 30 mol% of the CoPtBN. The CoPtBN may have a face-centered cubic (FCC) crystal structure. The HAMR media may have various other layers, such as a substrate, a heat sink layer on the substrate, and a seed layer on the heat sink layer, with the magnetic recording layer on the seed layer. The seed layer may include MgO or MgO-TiO. An amorphous soft underlayer (SUL) may be provided.

Provided is a storage case and a package that reduce wear of a support surface compared to a structure that supports side surfaces of a plurality of tape cartridges with the entire support surface of the side surfaces. The storage case includes a support surface that supports side surfaces of a plurality of tape cartridges, and the support surface includes a first surface and a second surface that is located on a side closer to the side surfaces than the first surface.

To provide a magnetic tape cartridge, a cartridge management system, a reading method, and a program enabling accurately reading an identifier.SOLUTION: A magnetic tape cartridge includes a case on which an identifier is displayed, and a storage medium in which reading condition information that is information regarding a condition for reading the identifier is stored.SELECTED DRAWING: Figure 8

The present disclosure relates generally to spintronic material stacks and devices. Various disclosed embodiments of YBiPt-based spin-orbit torque (SOT) stacks can be used for high-temperature applications. Disclosed herein are various buffer and / or intermediate layer configurations in spintronic stacks that can promote the growth of YBiPt in the (110) orientation to promote a high spin-Hall angle (SHA) in SOT applications. One embodiment is a spintronic stack including a buffer layer including one or more layers each individually including MgO(100), TiN(100), Ta, Nb, HfN, Ta3W2(110), TaW2(100), Ta3W2N, TaW2N, or YBiPt; an SOT layer including YBiPt with a (110) orientation; an intermediate layer including one or more of MgO, Ta3WN, TaW3N, Ta3W(110), TaW3(100), YPt(110), NiFeGeN, NiAlN, NiAl, NiFeGe, NiAlGe, or HfN; and a ferromagnetic layer.

To provide a magnetoresistance effect element with a large MR ratio.SOLUTION: A magnetoresistance effect element comprises a first ferromagnetic layer, a second ferromagnetic layer, and a non-magnetic layer. The first ferromagnetic layer includes a first layer and a second layer. The first layer is arranged closer to the non-magnetic layer than the second layer. The first layer contains a heusler alloy which is at least partially crystallized. The second layer includes a ferromagnetic body which is at least partially crystallized, unlike the heusler alloy. The first layer and the second layer include a first atom added. The first atom is one selected from the group consisting of Mg, Al, Cr, Mn, Ni, Cu, Zn, Pd, Cd, In, Sn, Sb, Pt, Au, and Bi.SELECTED DRAWING: Figure 1

Provided is a disk device, a control method for a disk device, and a program, which enable a rotational latency to be minimized to access a next logical block address (LBA) regardless of which head is used for access in a disk device having a plurality of heads. The disk device of an embodiment includes a storage unit that stores a table in which a track skew value for each head is stored, and a control unit that reads out a track skew value corresponding to a head that is an object of operation from the table and performs track control.

A hard disk drive includes a heat-assisted magnetic recording head and an enclosure. The enclosure is configured to contain the heat-assisted magnetic recording head and other components of the hard disk drive. The enclosure includes a base and a thermally processed top cover including a thermally oxidized interior surface. Preferably, a composition of the thermally oxidized surface of the thermally processed top cover comprises at least 5 percent oxygen. More preferably, an average oxidation depth of the thermally oxidized surface of the thermally processed top cover is at least 8 nanometers.

This disclosure generally relates to the design of a spin-orbit torque (SOT) differential reader. The SOT differential reader is a multi-terminal device comprising 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 serves as an electrode and is disposed between the first and second spin Hall layers. Electrical lead connections are located around the first spin Hall layer, the second spin Hall layer, the gap layer, the first shield, and / or the second shield. These lead connections facilitate the flow of current from the negative lead to the positive lead and / or the voltage from the negative lead to the positive lead. The positioning of these lead connections and the positioning of the SOT differential layers improve the reader resolution without reducing the shield-to-shield spacing (i.e., the read gap).

To provide a cartridge management device, a cartridge management system, an operation method of the cartridge management device, and a program that can inhibit unauthorized reuse of a magnetic tape cartridge.SOLUTION: When no registered information indicating that a cartridge has been registered in a cartridge management system is stored in a cartridge memory provided in the cartridge, a library controller equipped with a storage performs first registration processing for registering the identification information identifying the cartridge and the registered information in the cartridge memory, overwrite prohibition processing for prohibiting overwriting the identification information and the registered information registered in the cartridge memory, second registration processing for registering the identification information in the storage, and execution processing to read and write user data to and from the cartridge when the identification information stored in the storage and the identification information stored in the cartridge memory match.SELECTED DRAWING: Figure 11

A magnetic recording medium is described that includes a substrate and an amorphous soft underlayer (SUL). A Ni-Pt seed layer is formed on the SUL in which Pt atoms have substituted at least some of the Ni atoms within the Ni lattice structure of Ni-Pt to form a solid solution of Ni-Pt. In some examples, the Ni-Pt seed layer is formed from Ni40Pt60. A Ru intermediate layer is formed on the seed layer. In some examples, the lattice mismatch of the Ni-Pt seed layer and the Ru intermediate layer is 0.4% or less. A magnetic recording layer is formed on the Ru intermediate layer. Additional layers or films may be provided. The media may be configured for use with perpendicular magnetic recording (PMR). A data storage device is described that includes the magnetic recording medium. Methods for manufacturing the magnetic recording media are also described herein.

To improve accuracy of current detection.SOLUTION: An A / D converter converts an error signal VERR based on an error between a current feedback signal VFB and a reference signal VDAC into a digital signal DERR at the timing of an S / H signal. In a first mode, a compensator uses a value A1 of the error signal captured by the A / D converter at the timing of a negative edge of a first pulse PWMA as a value A1' of the error signal at the timing of a positive edge of a second pulse PWMB.SELECTED DRAWING: Figure 4

The invention discloses magnetic tape unit equipment, a storage system, a control method of a magnetic head and a controller, and relates to the technical field of magnetic tapes. A plurality of magnetic heads are arranged in the magnetic tape unit. Therefore, by providing the redundant magnetic head, the service life of the magnetic head in the magnetic tape unit equipment can be prolonged, and the service life of the magnetic tape unit equipment is further prolonged. And in the magnetic head cleaning treatment process, the first magnetic head or the second magnetic head in the multiple magnetic heads is driven by the magnetic head driver to access the magnetic tape, so that the data access function can still be provided in the magnetic tape unit equipment, and the data access service does not need to be interrupted.

A hard disk drive includes: a plurality of disk media mounted on a main shaft in which an outer diameter of each disk media is offset from an inner diameter of the disk media in the same direction along a rotation axis of the main shaft; and a load / unload ramp positioned to align correspondingly with the outer diameter of the disk media based on the offset. Thus, curvature of irregular disk media, such as curvature associated with thinner and thinner disks, is mitigated by grouping similarly characterized irregular disks together on a given principal axis and compensating for ramps accordingly.

Various apparatuses, devices, methods, and media are disclosed for heat-assisted magnetic recording (HAMR) that, in some examples, provide a HAMR medium with a platinum-doped CO—BN capping layer. In one example, the HAMR medium includes a CoPtBN capping layer on a magnetic recording layer with Pt in the range of 5-12 atomic percentage (at. %). An atomic ratio of Co to Pt within the CoPtBN may be, e.g., in the range of 5 to 13. The BN in the CoPtBN may be, e.g., 22-30 mole percentage of the CoPtBN. The CoPtBN may have a face-centered cubic (FCC) crystalline structure. The HAMR medium may have various other layers, such as a substrate, a heatsink layer on the substrate, and a seed layer on the heatsink layer, with the magnetic recording layer on the seed layer. The seed layer may include MgO or MgO—TiO. An amorphous soft underlayer (SUL) may be provided.

To provide a disk device capable of improving the degree of freedom of design.SOLUTION: A disk device according to one embodiment includes a plurality of magnetic disks, a spindle motor, a housing, a first substrate, and a first connector. The magnetic disks are arranged in an axial direction along a first rotation axis. The spindle motor rotates the magnetic disk. The housing has a first wall provided therein with a space housing the magnetic disk and the spindle motor, to which the spindle motor is attached, and a second wall projecting from the first wall and surrounding the space. The first substrate is attached to the outer surface of the second wall facing the outside of the space. The first connector is attached to the first substrate. The diameter of the magnetic disk is 80 mm or more and 100 mm or less. The maximum dimension of the housing in the axial direction is 26.2 mm or more.SELECTED DRAWING: Figure 1

The application discloses a magnetic recording device, a multi-state disk and a read-write method, and belongs to the field of magnetic storage. The magnetic recording device comprises a substrate and a magnetic recording film above the substrate. The magnetic recording film is circular and comprises three ferromagnetic layers separated by two non-magnetic intermediate layers. The easy magnetization directions of the three ferromagnetic layers are along the x, y and z directions respectively. The z direction is the vertical direction, and the x and y directions are in-plane directions and are along the radial direction and the tangential direction respectively. The multi-state disk comprises the magnetic recording device, a read head, a write head and magnetic shielding layers on both sides of the read head. The write head comprises a vertical magnetic pole and two pairs of horizontal magnetic poles, and coils wound on the magnetic poles. The read head comprises a spin current generation layer and a film layer structure (a magnetic tunnel junction, a spin valve or a Hall bar). The application can improve the storage density of the magnetic recording device, thereby greatly improving the storage density of the disk based on the magnetic recording device.

The invention relates to an alkali-free glass substrate. The present invention provides an alkali-free glass substrate capable of easily removing bubbles contained in molten glass in a reduced pressure atmosphere. The present invention relates to an alkali-free glass substrate containing 54%-68% of SiO2, 10%-25% of Al2O3, 0.1%-5.5% of B2O3, and 8%-26% of MgO + CaO + SrO + BaO in terms of mass% of oxides, characterized in that the alkali-free glass substrate has a [beta]-OH of 0.15 mm-1 to 0.35 mm-1, a Cl content of 0.15%-0.3% by mass, and a bubble growth index I represented by formula (1) of 320 or more, I = 590.5 [[beta]-OH] + 874.1 [Cl]-5.7 [B2O3]-33.3 (1) in which [beta]-OH] and Cl are contained in the alkali-free glass substrate, and in which [beta]-OH] and Cl are not contained in the alkali-free glass substrate, and B2O3 is [beta-OH] represents beta-OH (mm-1) of the alkali-free glass substrate, [Cl] represents the Cl content (mass%) of the alkali-free glass substrate, and [B2O3] represents the B2O3 content (mass%) of the alkali-free glass substrate.

A system, a procedure, and a computer program product are provided for minimizing the recovery time of a high-resolution tape directory (HRTD) when the HRTD is invalid. A tape drive can load a tape into the drive. In response to receiving a write command or a read command at a tape start position (BOT), the tape drive can execute the write command or the read command without performing an HRTD recovery. In response to receiving the write command or the read command at a position other than the BOT, the tape drive can determine whether the HRTD is valid. In response to determining that the HRTD is invalid, the tape drive can reset a timer.

A system and method reclaims select components containing rare earth metals of electronic media electronic storage devices such as hard disk drives, solid state drives and hybrid hard drives and destroys the data containing components thereof. The system employs first devices, such as milling tools, to loosen various components of the storage device. The various loosened components include the components containing the rare earth metals and the data containing portions. Second devices, such as pick and place mechanisms, are provided for removing components from the storage device. A holding chassis receives the storage device, and moves the storage device for engagement with the first and the second devices. A section is provided for destroying the data containing portion of the electronic media storage device.

Described herein are methods and apparatus for filling features on a substrate. In some embodiments, the method of filling features on a substrate includes depositing a first metallic material in and on the feature disposed in the substrate by a chemical vapor deposition (CVD) process in a first processing chamber at a first temperature, depositing a second metallic material on the first metallic material in a second processing chamber at a second temperature and a first bias power to form a seed layer of the second metallic material, etching the seed layer in the second processing chamber at a second bias power greater than the first bias power to form a mixed layer in the feature including the first metallic material and the second metallic material, and heating the substrate to a third temperature greater than the second temperature to reflow the second metallic material.

Provided is a fluorine-containing ether compound represented by the following formula. R1-CH2-R2a-CH2-R3a-CH2-R2b-CH2-R3b-CH2-R2c-CH2-R3c-CH2-R2d-CH2-R4 (R2a, R2b, R2c,and R2d are perfluoropolyether chains. R3a, R3b, and R3c are divalent linking groups having at least one polar group. At least one among R3a, R3b, and R3c is represented by -OCH2CH(OH)CH2O-. R1 and R4 are C1-C50 terminal groups having at least one polar group, and may be the same as or different from each other.)

The present disclosure relates generally to spintronic material stacks and devices. Various disclosed embodiments of YBiPt-based spin-orbit torque (SOT) stacks can be used for high-temperature applications. Disclosed herein are various buffer and / or intermediate layer configurations in spintronic stacks that can promote the growth of YBiPt in the (110) orientation to promote a high spin-Hall angle (SHA) in SOT applications. One embodiment is a spintronic stack including a buffer layer including one or more layers each individually including MgO(100), TiN(100), Ta, Nb, HfN, Ta3W2(110), TaW2(100), Ta3W2N, TaW2N, or YBiPt; an SOT layer including YBiPt with a (110) orientation; an intermediate layer including one or more of MgO, Ta3WN, TaW3N, Ta3W(110), TaW3(100), YPt(110), NiFeGeN, NiAlN, NiAl, NiFeGe, NiAlGe, or HfN; and a ferromagnetic layer.

A method for evaluating the performance of a lubricating layer according to the present invention comprises: a step for preparing a lubricant molecule model and a protective layer model by using a quantum chemical calculation; a step for performing a molecular dynamics calculation of an initial lubricating layer model constructed from the lubricant molecule model and the protective layer model; and a step for calculating an index of the adsorption degree of a lubricant molecule to a protective layer, from the results of the molecular dynamics calculation.

The embodiment of the invention relates to a magnetic disk device. A magnetic disk device according to an embodiment includes a rotating shaft, a shroud, and a damper. The rotating shaft rotates the plurality of discs. The shield surrounds at least a portion of the disc so as to be spaced apart from the outer edge of the disc and along the outer edge of the disc. The damper is disposed on a downstream side of the shroud with respect to a flow between the disks induced by rotation of the disks, and has a portion intersecting the flow and a portion along the flow.

A semiconductor device and a method of forming the same are provided. The method includes forming a bottom electrode layer over a substrate. A magnetic tunnel junction (MTJ) layer is formed over the bottom electrode layer. A top electrode layer is formed over the MTJ layer. The top electrode layer is patterned. After the top electrode layer is patterned, one or more process cycles are performed on the MTJ layer and the bottom electrode layer. The patterned top electrode layer, the patterned MTJ layer, and the patterned bottom electrode layer form an MTJ structure. Each of the one or more process cycles includes performing an etch process on the MTJ layer and the bottom electrode layer for a first duration, and performing a magnetic treatment on the MTJ layer and the bottom electrode layer for a second duration.

A magnetoresistive element comprising a reference layer, a ferromagnetic sense layer having a free sense magnetization, and a tunnel barrier layer between the reference layer and the sense layer. The sense layer comprises a first sense layer portion in contact with the tunnel barrier layer and a second sense layer portion in contact with the first sense layer portion. The first sense layer portion is configured such that a magnetic coupling between the first and second sense layer portions is between ±10−4 J / m2 and ±10−3 J / m2; and a perpendicular magnetic anisotropy (PMA) originating from the interface between the first sense layer portion and the tunnel barrier layer is between 8×104 A / m and 8×105 A / m, such as to shift positively the TCS of the magnetoresistive element and compensate the negative temperature coefficient of TMR of the magnetoresistive element.

A contactless current sensing circuit for sensing current in a conductive wire on a dielectric substrate of a printed circuit board (PCB) includes a plurality of magnetic tunneling junction (MTJ) structures including first and second MTJ structures on a first side of the conductive wire, and third and fourth MTJ structures on a second side of the conductive wire opposite to the first side. The MTJ structures are located within the H-field induced by a current flowing through the conductive wire.

An object of the present invention is to provide a glass capable of suppressing deformation such as warpage of a glass substrate, having excellent formability, imposing a low burden on production equipment, and facilitating production of a large and thin glass substrate.SOLUTION: The glass of the present invention has a density, a Young's modulus, a strain point, a temperature T4 at which the glass viscosity becomes 104 dPa·s, a glass surface devitrification temperature (Tc), and a thermal expansion coefficient within predetermined ranges, and the contents of at least one alkali metal oxide selected from the group consisting of SiO2, Al2O3, Li2O, Na2O, and K2O, and P2O5 are within predetermined ranges.SELECTED DRAWING: None

To provide a glass capable of suppressing deformation of a glass substrate such as warp, being excellent in molding properties, causing less load on a production apparatus, and facilitating production of a large sized and thin glass substrate.SOLUTION: Glass according to the present invention is configured so that its density, Young modulus, strain point, temperature T4 at which the glass viscosity is 104 dPa s, a glass surface devitrification temperature (Tc) and thermal expansion coefficient are in prescribed ranges. A content of at least one kind of an alkali metal oxide selected from SiO2, Al2O3, Li2O, Na2O and K2O and a content of P2O5 are in prescribed ranges.SELECTED DRAWING: None

The present application relates to a non-contact communication device, a magnetic tape drive, a non-contact communication system, a method of operating a non-contact communication device, and a storage medium. The non-contact communication device includes a processor and a transceiver. The transceiver induces power in a non-contact storage medium by applying a magnetic field to the non-contact storage medium mounted on a magnetic tape cassette, and performs transmission and reception of information with the non-contact storage medium through electromagnetic induction coupling. The non-contact storage medium has a measurement circuit that measures the power, and transmits power information related to the power measured by the measurement circuit to the non-contact communication device. The transceiver receives the power information, and the processor performs support processing for supporting the transmission and reception based on the power information received by the transceiver.