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7442263 |
The invention relates to a transductor regulator with a magnetic core which is made up of a nanocrystalline alloy which is almost free of magnetorestriction. The core has as low cyclic magnetization losses as possible and as rectangular ...
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7441324 |
A method is provided for preserving the transverse biasing of a GMR (or MR) read head during back-end processing. In a first preferred embodiment, the method comprises magnetizing the longitudinal biasing layers of the read head in a tra...
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RE40348 |
A thin arc segment magnet made of a an R- T - B based, rare earth sintered magnet substantially comprising 28-33 weight % of R and 0.8-1.5 weight % of B, the balance being substantially Fe T , wherein R is at least one rare eart...
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7362015 |
This invention relates to a transformer and more particularly, to a system and method for making a transformer utilizing dynamic magnetic compaction. A coil is placed in a conductive container, and a conductive powder material, such as f...
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7350559 |
Thus, as shown by an exact electrodynamic computation of EMBF and the estimations described above of the velocity of turbulent flows arising due to their effect, application of amplitude- and frequency-modulated helically traveling (rota...
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7344653 |
A bitumen film containing magnetic powder is heated prior to magnetization to a temperature enabling the magnetic powder particles to be oriented according to the effect of the magnetic field. The bitumen film is sufficiently cooled afte...
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7320169 |
In a conventional spin valve the shunt resistance of the pinning layer reduces the overall efficiency of the device. This problem has been overcome by using IrMn for the pinning layer at a thickness of about 20 Angstroms or less. For the...
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7276128 |
A ferromagnetic resonator for use in a marker in a magnetomechanical electronic article surveillance system is manufactured at reduced cost by being continuously annealed with a tensile stress applied along the ribbon axis and by providi...
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7237320 |
A pole piece of a magnetic write head is formed over a substrate and includes a pole tip having a width that is less than its height which is normal the substrate. Due to stress-anisotropy, the pole tip structure has an inherent easy-axi...
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7232495 |
The method of the present invention includes a step of preparing a rare earth magnet 22 disposed for forming a cylinder 22 a , a first magnetizing step of applying a first external magnetic field H 1 to the rare earth magnet 22 , th...
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7207102 |
Methods are provided for forming a plurality of permanent magnets with two different north-south magnetic pole alignments for use in microelectromechanical (MEM) devices. These methods are based on initially magnetizing the permanent mag...
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7179338 |
Magnetostrictive devices and methods involving a magnetostrictive alloy having; (1) one or more of Pd, and Pt, and (2) one or more of Ni, Co, Fe, where the alloy comprises one or more of Pd x Ni 1−x , Pd x Fe 1−x , Pd x Co 1−x , Pt...
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7166173 |
Magnetic tunnel junction (MTJ) and charge perpendicular-to-plane (CPP) magnetic sensors are disclosed which have a first antiferromagnetic layer for pinning the magnetization direction in a pinned layer and a second antiferromagnetic lay...
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7150092 |
A method of manufacturing a spin-valve thin-film magnetic element is provided. The spin-valve thin-film magnetic element includes a free magnetic layer and laminates of pinned magnetic layers and antiferromagnetic layers formed on two su...
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7089648 |
There is provided a magnetoresistive head which can realize high sensitivity and low noise even when the reading track is being reduced. Longitudinal biasing is performed to a ferromagnetic free layer whose magnetization is rotated accor...
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7068478 |
Replacing ruthenium with rhodium as the AFM coupling layer in a synthetically pinned CPP GMR structure enables the AP1/AP2 thicknesses to be increased. This results in improved stability and allows the free layer and AFM layer thicknesse...
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7063753 |
Present invention provides enabling techniques of integrating novel nanotube elements into semiconductor devices, particularly in transistors, as gate channels or/and as interconnects. This is done in a series of process steps, which con...
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7063752 |
A method for refining the grain size of alloys which undergo ferromagnetic to paramagnetic phase transformation and an alloy produced therefrom. By subjecting the alloy to a timed application of a strong magnetic field, the temperature o...
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7045092 |
A perpendicular pressing/compacting method for a rare-earth alloy powder is provided to produce a sintered magnet with excellent magnetic properties. A method for pressing a rare-earth alloy powder by using a die is provided. The die is ...
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6918965 |
A device for magnetically annealing magnetoresistive elements formed on wafers includes a heated chuck and a delivery mechanism for individually placing the wafers individually on the chuck one at a time. A coil is adjacent to the chuck ...
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6901652 |
A method for manufacturing magnetic sensing elements for use in magnetic sensors and hard disks. A ferromagnetic layer and a second antiferromagnetic layer are deposited on a nonmagnetic layer having a uniform thickness. The second antif...
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6878305 |
Coupling components to an underlying substrate using a composition of a polymer and magnetic material particles. Upon applying the composition between the component and the printed circuit board, the composition may be subjected to a mag...
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6873239 |
A bulk amorphous metal inductive device comprises a magnetic core having at least one low-loss bulk ferromagnetic amorphous metal magnetic component forming a magnetic circuit having an air gap therein. The component comprises a pluralit...
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6779248 |
In bottom spin valves of the lead overlay type the longitudinal bias field that stabilizes the device tends to fall off well before the gap is reached. This problem has been overcome by providing a manufacturing process that includes ins...
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6773513 |
A method using of a magnetic field to affect residual stress relief or phase transformations in a metallic material is disclosed. In a first aspect of the method, residual stress relief of a material is achieved at ambient temperatures b...
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6770242 |
Permanent magnet for voice coil actuator motors used to actuate head-arm assemblies in small form disk drives are produced from a dispersion of prealloyed rare earth magnetic particles in a thermoplastic binder. Upon shaping of green par...
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6760966 |
As track density requirements for disk drives have grown more aggressive, GMR devices have been pushed to narrower track widths to match the track pitch of the drive width. Narrower track widths degrade stability, cause amplitude loss, d...
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6721145 |
A method of initializing a magnetic sensor having two antiferromagnetic layers is described. The method takes advantage of the spin flop effect such that the two antiferromagnetic layers may be orthogonally initialized. The signal polari...
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6690279 |
The invention is directed to a security element for the electronic surveillance of articles. This security element is detected by surveillance systems operating in different frequency ranges and it includes at least two materials of high...
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6645314 |
A ferromagnetic resonator for use in a marker in a magnetomechanical electronic article surveillance system is manufactured at reduced cost by being continuously annealed with a tensile stress applied along the ribbon axis and by providi...
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6599468 |
The present invention provides a powder compacting apparatus including: a die having a through hole forming a cavity; a first punch and a second punch for pressing a rare-earth alloy magnetic powder filled in the cavity; and a magnetic f...
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6551416 |
A ferromagnetic resonator for use in a marker in a magnetomechanical electronic article surveillance system has improved magnetoresonant properties and/or reduced eddy current losses by virtue of being annealed so that the resonator has ...
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6522507 |
A method for fabricating a single top spin valve head that is capable of reading ultra-high density recordings. Said top spin valve has a CoFe free layer for high GMR ratio, which is grown on a NiCr/Ru layer to provide better magnetic pr...
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6517744 |
A heat-conductive sheet comprising a cured or semi-cured binder wherein a carbon fiber is orientated in the direction of the thickness of the heat-conductive sheet. This heat-conductive sheet exhibits a high anisotropic heat conductivity...
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6500570 |
A spin-valve magnetoresistive element includes an antiferromagnetic layer, a first pinned magnetic layer, a nonmagnetic interlayer, a second pinned magnetic layer, a nonmagnetic conductive layer, a free magnetic layer, a pair of longitud...
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6499211 |
A storage tray for storing magnetized magnets for assembly in a disc drive. The tray includes a base having a support surface and a cover sized to cover the support surface. The base is formed of a material having magnetic properties for...
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6478884 |
A manufacturing method of a thin-film magnetic head with a spin valve effect MR read sensor includes a temperature-annealing step of firmly fixing the direction of the pinned magnetization in the spin valve effect MR sensor. The temperat...
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6469878 |
Methods of fabricating spin valve sensors in accordance with the invention include forming a pinning layer from an antiferromagnetic material and forming a synthetic antiferromagnet adjacent the pinning layer. A free ferromagnetic layer ...
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6455815 |
An oven for magnetic annealing of magnetic media, along with methods for using the same. The oven has a vacuum chamber with vacuum port for loading and unloading magnetic media. The vacuum port is sealed by a vacuum seal or door adapted ...
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6432554 |
This invention relates to a transformer and more particularly, to a system and method for making a transformer utilizing dynamic magnetic compaction. A coil is placed in a conductive container, and a conductive powder material, such as f...
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6432158 |
A method for producing a compact of rare earth alloy powder of the present invention includes: a powder-filling step of filling rare earth allow powder in a cavity formed by inserting a lower punch into a through hall of a die of a powde...
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6413325 |
A method of manufacturing a thin-film magnetic head with a SVMR element which includes first and second layers of a ferromagnetic material (free and pinned layers) separated by a layer of non-magnetic electrically conductive material, an...
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6406556 |
A manufacturing method of a thin-film magnetic head with a MR multi-layered structure using exchange coupling magnetic bias, has a step of forming the MR multi-layered structure, and a step of providing the exchange coupling magnetic bia...
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6379589 |
Shielding materials are fabricated from a new three-layered particle having a core, a metal layer, and a conductive polymer layer. The new particles are blended into a polymer matrix and processed in the absence or under the influence of...
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6375760 |
A structure of a two-phase steel is controlled by subjecting a steel containing C: 0.05-0.80 mass % to a strain work in a true strain quantity of not less than 0.1 at a temperature zone of α-phase or γ-phase and then applying a magneti...
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6364961 |
A method is disclosed for magnetizing a magnetic system including a ferromagnetic layer magnetized in a first direction and an anti-ferromagnetic layer provided on said ferromagnetic layer in exchange coupling therewith. The method inclu...
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6359563 |
A resonator, having a width no larger than about 13 mm, for use in a marker containing a bias element which produces a bias magnetic field in a magnetomechanical electronic article surveillance system is produced from annealed ferromagne...
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6358332 |
A process for resetting or initially establishing the magnetic orientation of one or more spin valves in a magnetoresistive read head with improved robustness. The spin valve includes subcomponents such as an antiferromagnetic layer, a f...
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6355115 |
A method is disclosed for fabricating a spin-valve magnetic head including a layered body of a first ferromagnetic layer having a first easy axis of magnetization extending in a first direction, a non-magnetic layer formed on the first f...
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6352598 |
A rare-earth alloy powder pressing apparatus comprises a die. The die includes a die main body. The die main body includes a through hole for formation of a cavity, and an auxiliary yoke. A rare-earth alloy powder is fed into the cavity....
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