47results about "Heads with composite cores" patented technology

A method or forming a wrapped-around shielded perpendicular magnetic recording writer pole is disclosed. A structure comprising a leading shield layer and an intermediate layer disposed over the leading shield layer is provided, the intermediate layer comprising a pole material and a dielectric material. A trench is formed in the dielectric material. A non-magnetic layer in the trench is removed via an ion beam etching process. A seed layer is deposited in the trench and over the pole material. A magnetic material comprising a side shield layer is deposited on at least a portion of the seed layer.

A magnetic device comprises first through third ferromagnetic layers, first and second intermediate layers and a couple of electrodes. The first ferromagnetic layer includes magnetic layers and one or more nonmagnetic layers which are alternately stacked, at least one layer of the magnetic layers has magnetization substantially fixed to a first direction, and two or more layers of the magnetic layers are ferromagnetically coupled via the nonmagnetic layers while having easy axes of magnetization parallel to a film plane. The second ferromagnetic layer has magnetization substantially fixed to a second direction. The third ferromagnetic layer is provided between the first ferromagnetic layer and the second ferromagnetic layer. The third ferromagnetic layer has a variable direction of magnetization. The first and second intermediate layers are provided between the ferromagnetic layers. The electrodes are configured to provide write current between the first and second ferromagnetic layers to cause spin-polarized electrons to act on the third ferromagnetic layer so that the direction of magnetization of the third ferromagnetic layer is determined depending on a direction of the current. The ferromagnetic coupling has a strength such that a parallel magnetic alignment of the magnetic layers is maintained when the write current.

Transducer elements of recording heads for magnetic storage media are moved independently in either of two directions with respect to the slider of the recording head. The motion is controlled using a micropositioner having magnetic coils integrated into the recording head. The transducer moves in the x direction between data tracks and in the z direction perpendicular to the surface of the magnetic storage medium. The micropositioners are used for small-scale positioning of the transducers over data tracks and to adjust fly heights. Because of the high minimum resonant frequencies and the low mass of the transducers, the micropositioners also improve settling times associated with track following. The micropositioners can be used during fabrication for dimensional control of recording head components. The motion of the transducers in the z direction enables the recording heads to be used reliably in the presence of asperities and changing ambient pressures and temperatures.

A thin film magnetic recording head is provided with a tape bearing surface that has magnetically isolated channels while still providing a maximum continuous surface area with which to engage the media. This can be accomplished by providing spaces in the magnetically permeable thin film that are large enough to prevent cross-talk between the channels, but small enough to prevent significant interference with the moving media. Alternatively, magnetically impermeable thin film spacers can be provided to magnetically isolate each of the channels. The spacers are generally even with the magnetically permeable thin film so as to provide a continuous media-bearing surface.

A transducing head has a main pole and at least one magnetic element (such as a return pole or a shield) which provides a potential return path for a magnetic field produced by the main pole. The magnetic element is spaced from the main pole. The magnetic element has a first edge closest to the main pole and a second edge furthest from the main pole. Permeability of the magnetic element increases from the first edge to the second edge.

The present invention includes magnetic write elements with portions formed a nanophase high magnetic moment material to enable further increases in areal density in magnetic recording. The nanophase deposited high magnetic moment material comprises coated nanoclusters and nanolaminated cluster films that are deposited to form nanophase high magnetic moment material portions of a write pole and SUL layer in perpendicular recording media. The nanophase write poles exhibit high magnetic moments and are generally compatible with conventional writer head fabrication techniques.

In a magnetic head of a high-frequency magnetic field assisted recording system, a width of a high-frequency magnetic field from an oscillator is decreased to enhance an oscillation frequency, in order to realize a high-density recording. An oscillator provided near a main pole, which generates a recording magnetic field, for generating a high-frequency magnetic field is patterned by a conventional photolithography, and then, an oxidation, nitridation, or oxynitridation is performed on the side face in a track width direction. With this process, an oxide layer, a nitride layer, or an oxynitride layer, which is made of a material of the oscillator, is formed on the side face of the oscillator in the track width direction, and the shape of the oscillator is formed to be semi-circular.

Disclosed are a magnetic sensing element in which side reading can be prevented, read sensitivity can be improved, and gap narrowing is enabled, and a method for fabricating the same. A magnetic sensing element includes a pair of first antiferromagnetic layers separated by a first spacer section. A first spacer layer is disposed in the first spacer section. The first spacer layer has the same composition as that of the first antiferromagnetic layers, and has a disordered crystal structure with a thickness that is smaller than that of the first antiferromagnetic layers. A first free magnetic layer is disposed on the continuous surface including the upper surfaces of the first antiferromagnetic layers and the first spacer layers. The magnetic sensing element also includes a nonmagnetic interlayer, a second free magnetic layer, and a pair of second antiferromagnetic layers separated by a second spacer section on the second free magnetic layer.

The invention discloses a magnetization turnover device based on track transfer torque and an implementation method thereof. A direct-current write-in current is introduced through a source electrode and a drain electrode to polarize the out-of-plane orbital magnetic moment and then generate an out-of-plane anti-damping moment effect, and magnetization overturning, called orbital transfer moment, of a perpendicular magnetic anisotropy free ferromagnetic layer can be achieved under the out-of-plane anti-damping moment effect without assistance of an additional magnetic field. After the write-in current is removed, the perpendicular magnetic anisotropy free ferromagnetic layer keeps the changed magnetization state, so that the free ferromagnetic layer has non-volatility. A direct-current reading current is introduced through the source and drain electrodes, and the Hall resistance of a heterojunction is obtained through a measuring electrode, so that the magnetization state of the vertical magnetic anisotropy free ferromagnetic layer is reflected. The direction of the write-in current is changed to realize a reverse orbit transfer torque, so that the magnetization of the vertical magnetic anisotropy free ferromagnetic layer is reversely overturned. The critical current required by the track transfer torque for realizing magnetization overturning is smaller, so that the power consumption of the device can be greatly reduced.

A thin film magnetic head and a method for manufacturing the same is provided, wherein first coil pieces and second coil pieces provided one above the other with a magnetic pole layer therebetween are electrically connected to each other with reliability and with ease, and the above-described magnetic pole layer can be provided on a flattened surface. A laminate provided on a coil insulation layer can be formed on a flattened surface and, therefore, the above-described magnetic pole layer can be formed into a predetermined shape. As a result, the track width can have a predetermined dimension, and the second coil pieces provided on the above-described laminate can be reliably, easily connected to the top surfaces of connection layers exposed at the top surface of the coil insulating layer.

Provided are a magnetic transducer having good thermal stability, a thin film magnetic head, a method of manufacturing a magnetic transducer and a method of manufacturing a thin film magnetic head. A stack of an MR element has a stacked structure comprising an underlayer, a first soft magnetic layer, a second soft magnetic layer, a nonmagnetic layer, a ferromagnetic layer, an antiferromagnetic layer and a capping layer, which are stacked in this order on the underlayer. The ferromagnetic layer is divided into a bottom layer and a top layer in the direction of stack. A ferromagnetic interlayer having magnetism and having higher electrical resistance than the electrical resistance of the ferromagnetic layer is formed between the bottom layer and the top layer. The ferromagnetic interlayer magnetically integrates the bottom layer with the top layer and limits a path for electrons moving through the stack, thereby improving the rate of resistance change. Furthermore, the ferromagnetic interlayer contains, as an additive, at least one element in a group consisting of Mn, Cr, Ni, Cu, Rh, Ir and Pt and thus prevents heat deterioration in the stack.

Double photolithography is used to produce an under-layer of protective and filtering photoresist over a substrate that will have channels milled with a FIB. Secondary layers are applied with precision on top of the first layer in order to define the precise patterns to be milled and to provide targeting and alignment fiducials.

A magnetic head for a magnetic recording/reproducing device to conform to high-density recording, wherein a metal magnetic film with a high saturation flux density is employed and the mechanical strength of the sealing glass for magnetic heads, is improved thereby achieving a high reliability, high performance magnetic head. Also, this is provided a magnetic recording/reproducing device utilizing the magnetic head.

Sealing glass for magnetic heads comprising, by oxide conversion, 17.2 to 25 wt % of SiO₂, 1 to 10 wt % of B₂O₃, 58 to 75 wt % of PbO, 0.2 to 7 wt % of at least one of Al₂O₃ and ZnO, and 0.2 to 5 wt % of at least one of Na₂O and K₂O, and a magnetic head and magnetic recording/reproducing device which utilize the sealing glass.