Abstract: A ferroelectric recording medium includes an electrode layer, a ferroelectric recording layer, and a protection layer formed in this order on a substrate, wherein the ferroelectric recording layer includes a ferroelectric layer, the ferroelectric layer has an amorphous structure with short-range order, a distance of the short-range order is equal to or less than 2 nm, and a lattice constant of the amorphous structure and the lattice constant of the material constituting the substrate are lattice-matched within a range of ±10%.

Abstract: A data storage device is disclosed comprising a head actuated over an energy assisted magnetic media comprising a plurality of data tracks, wherein each data track comprises a plurality of data sectors. A write operation to a first data sector is executed by applying a first current to a write coil of the head while the head is over a second data sector preceding the first data sector, wherein the first current comprises a first amplitude. A second current is applied to the write coil while the head is over the first data sector, wherein the second current comprises a second amplitude lower than the first amplitude.

Abstract: According to one embodiment, among a plurality of magnetic heads, the larger the magnetic pole width of the magnetic pole of the magnetic head in the width direction of a recording track formed in a recording layer or the larger an area width of the magnetic head capable of reading the magnetic characteristics of an area of the recording layer on which magnetic recording has been carried out by means of the magnetic head, the farther is the magnetic head arranged outwardly from the vicinity of the center in the parallel arrangement direction of the magnetic disks.

Abstract: The present disclosure generally relates to a tape drive having a regenerative braking system. The tape drive comprises a first reel; a first spindle coupled to the first reel; a first motor coupled to the first spindle, wherein the first motor is configured to rotate the first spindle; a second reel; a second spindle coupled to the second reel; a second motor coupled to the second spindle, wherein the second motor is configured to rotate the second spindle; and a regenerative braking circuit coupled to the first motor and the second motor, wherein during a braking of the motors, the regenerative braking circuit and the motors convert a mechanical energy of the motors to electrical energy for a power storage mechanism, thereby providing resistance to the rotation of the spindles.

Abstract: This magnetoresistance effect element includes a first ferromagnetic layer, a second ferromagnetic layer, and a nonmagnetic layer provided between the first ferromagnetic layer and the second ferromagnetic layer. At least one of the first ferromagnetic layer and the second ferromagnetic layer has an alloy obtained by adding an additive element to a Heusler alloy. The additive element is any one or more elements selected from the group consisting of H, He, N, O, F, Ne, P, Cl, Ar, Kr, and Xe.

Abstract: Various illustrative aspects are directed to a data storage device comprising a slider with a resistive temperature detector with a first resistance, a resistance detection circuit electrically coupled to the first resistance and comprising a low and high frequency path corresponding to a DC and AC mode, respectively, and one or more processing devices configured to: bias the first resistance with a voltage bias, where the first resistance is coupled to a first and second amplifier, control a pulse generator to add a bias pulse on the HF path to generate a HF resistance detection signal, where the second amplifier is biased using the voltage bias and the bias pulse, control a clock to chop a LF signal at the first amplifier on the LF path, demodulate the chopped LF signal to generate a LF resistance detection signal, and concurrently process the HF and LF resistance detection signals.

Abstract: A cartridge includes a tape-shaped nonwoven fabric, a reel on which the tape-shaped nonwoven fabric is wound, and a case that accommodates the reel. A basis weight of the tape-shaped nonwoven fabric is equal to or less than 25 c/m2 and an average fiber diameter of the tape-shaped nonwoven fabric is equal to or less than 11 ?m.

Abstract: Provided are at least two bearings; an outer shaft having a tubular shape and supporting the bearings at an outer circumferential surface; and an inner shaft housed in the outer shaft with one end extending out from one opening part of the outer shaft. The inner shaft includes a male thread part at least at a portion extending out from the outer shaft.

Abstract: According to one embodiment, a disk clamp includes a disk-shaped main body including a central axis line, an annular mounting groove provided in a first surface of the main body, in which a wire for unbalance adjustment is mountable, a plurality of through-holes formed through the main body and spaced apart from each other equally in a circumferential direction around the central axis line, through each of which a fixing screw is insertable, and a plurality of female threaded holes formed on the first surface of the main body and spaced apart from each other equally in the circumferential direction, through each of which an adjustment screw for balancing adjustment is screwable.

Abstract: A slider may include a first side-edge surface, a second side-edge surface, and an air-bearing surface (ABS) comprising: a first side cavity adjacent to the first side-edge surface, and a first island side blocker situated at a mouth of the first side cavity, wherein: a first outer surface of the first island side blocker forms a portion of the first side-edge surface, a second outer surface of the first island side blocker is recessed from the first side-edge surface, a first side opening is situated on a leading side of the first island side blocker, and a second side opening is situated on a trailing side of the first island side blocker.

Abstract: According to an embodiment, on a first track of a magnetic disk, a plurality of first sectors in each of which a data segment is stored, and a second sector in which a parity for first error correction is stored are arranged in this order from a first position. A controller executes a first operation of sequentially reading a first data segment from each of the plurality of first sectors, and storing a group of the read first data segments in a buffer memory. The controller obtains a first parity from the group of the read first data segments. The controller starts a second operation of writing each first data segment stored in the buffer memory, to a first sector that is a read source among the plurality of first sectors, and writing the first parity to the second sector, before the magnetic head reaches the first position.

Abstract: A recording head has a magnetic write transducer having a first crosstrack width operable to write a single track of data at a time to a magnetic disk. The recording head also has a magnetic erase transducer separate from the magnetic write transducer. The magnetic erase transducer has a second crosstrack width operable to simultaneously erase multiple tracks of data from the magnetic disk.

Abstract: A hub includes a hub body around which a magnetic tape is wound, and a noncontact storage medium provided in the hub body, in which the noncontact storage medium stores hub specification information for specifying the hub body, and the hub specification information is associated with hub change characteristic information indicating a change characteristic of the hub body.

Abstract: A recording device that generates a hierarchy of groups for classifying each of a plurality of data to be recorded from information on each of the data, and performs a control of recording, for each group of a highest hierarchy, the plurality of data included in the group of the highest hierarchy on a recording medium in a recording order corresponding to an order from the top to the bottom of the hierarchy.

Abstract: A hard disk drive flexure assembly includes a base layer, a conductive layer, a plurality of electrical pads over the conductive layer, and a sidewall layer including sidewalls on each side of and extending higher than a corresponding electrical pad. Pre-solder bumps are formed between the sidewalls and over each pad. Use of sidewalls prevents the pre-solder bumps from undesirably bridging to an adjacent electrical pad and forming a short circuit, which might otherwise cause head-gimbal assembly (HGA) manufacturing failures and consequent increased cost. These techniques are especially relevant with narrow, high-density, small pitch electrical pads.

Abstract: According to an embodiment, a disk drive suspension includes a load beam, a flexure including a tongue on which a slider is mounted and an outrigger connected to the tongue, and overlapping the load beam, and a damper material attached to the load beam and the outrigger. Further, the damper material has a single-layer structure of a viscoelastic material.

Abstract: The magnetic tape includes: a non-magnetic support; and a magnetic layer containing a ferromagnetic powder, and a magnetic tape cartridge and a magnetic tape apparatus include the magnetic tape. In a binarized image of a secondary electron image obtained by imaging a surface of the magnetic layer with a scanning electron microscope at an acceleration voltage of 5 kV, the number of bright regions having an equivalent circle diameter of 60 nm or more and less than 120 nm is 8000 or more and 30000 or less. Standard deviation ? of the number of the bright regions in a width direction of the surface of the magnetic layer is 2000 or less.

Abstract: A tape drive includes a tape transport assembly, the tape transport assembly including a drive member, the drive member of the tape transport assembly configured to displace tape media in the tape drive; and a tape roller assembly, the tape roller assembly including a roller member, the roller member having one or more slanted grooves or protrusions formed in an outer surface of the roller member, the roller member configured to support and/or guide the tape media as the tape media is displaced by the tape transport assembly, the one or more slanted grooves or protrusions of the roller member configured to burnish and/or clean the tape media so as to prevent damage to a tape head, and the one or more slanted grooves or protrusions of the roller member being angled so as to prevent the tape media from sliding in an axial direction of the roller member.

Abstract: A read head includes a permanent magnet (PM) layer formed up to 100 nm behind a free layer where PM layer magnetization may be initialized in a direction that adjusts free layer (FL) bias point, and shifts sensor asymmetry (Asym) closer to 0% for individual heads at slider or Head Gimbal Assembly level to provide a significant improvement in device yield. Asym is adjusted using different initialization schemes and initialization directions. With individual heads, initialization direction is selected based on a prior measurement of asymmetry. The PM layer is CoPt or CoCrPt and has coercivity from 500 Oersted to 1000 Oersted. The PM layer may have a width equal to the FL, or in another embodiment, the PM layer adjoins a backside of the top shield and has a width equal to or greater than that of the FL.

Abstract: The present disclosure is generally related to a magnetic recording device comprising a magnetic recording head having a current flow in a cross-track direction around a main pole. The magnetic recording device comprises a main pole disposed between a trailing shield, a leading shield, and side shields. A trailing gap is disposed between the main pole and the trailing shield. A hot seed layer is disposed between the trailing gap and the trailing shield. A first insulation layer is disposed between the hot seed layer and the trailing shield, where the first insulation layer contacts the side shields. A second insulation layer is disposed between the main pole and leading shield, where the second insulation layer contacts the side shields. The first and second insulation layers direct the current through the side shields and across the main pole in a cross-track direction.