Patent application number | Description | Published |
20100073796 | MAGNETIC FIELD SENSOR - A device for sensing a magnetic field is described. The device comprises first, second and third leads and a junction between the leads. The junction and leads are arranged in a plane and the junction is configured to exhibit quantum confinement in a direction perpendicular to the plane. The first lead is arranged on one side of the junction and the second and third leads are arranged on an opposite side of the junction. The first lead is configured to limit angle of spread of charge carriers entering the junction so that, when charge carriers flow into the junction from the first lead, the charge carriers form a substantially nondivergent beam. | 03-25-2010 |
20110007431 | SPIN TORQUE OSCILLATOR SENSOR ENHANCED BY MAGNETIC ANISOTROPY - A spin torque oscillator device having a magnetic free layer with a magnetic anisotropy that has a component that is oriented perpendicular to a direction of an applied magnetic field. The spin torque oscillator device includes a magnetic reference layer, a magnetic free layer and a non-magnetic layer sandwiched there-between. A component of the magnetic anisotropy of the free layer can be oriented perpendicular to a magnetization of the reference layer, and this orientation relative to the magnetization of the reference layer can be either in lieu of or in addition to its orientation relative to the applied magnetic field. The magnetic anisotropy cants the magnetization of the free layer which would otherwise be oriented antiparallel with the magnetization of the reference layer. The magnetic anisotropy in the free layer improves performance of the spin torque sensor by reducing noise. | 01-13-2011 |
20110141629 | SPIN TORQUE OSCILLATOR SENSOR EMPLOYING ANTIPARALLEL COUPLED OSCILATION LAYERS - A spin torque magnetoresistive sensor having a very small gap thickness. The sensor operates by measuring the change in frequency of a spin torque induced magnetic oscillation in magnetic layers of the sensor to detect the presence of a magnetic field. The sensor includes a pair of free magnetic layers that are antiparallel coupled by a thin non-magnetic coupling layer there-between. The sensor does not include a pinned layer structure nor an associated AFM pinning layer, which allows the sensor to be constructed much thinner than prior art sensors. | 06-16-2011 |
20110151278 | MAGNETIC DEVICES AND MAGNETIC MEDIA WITH GRAPHENE OVERCOAT - A magnetic disk according to one embodiment includes a recording layer; and a layer of graphene formed above the recording layer. A nucleation layer may be formed between the recording layer and the graphene layer in some approaches. A magnetic device according to another embodiment includes a transducer; a nucleation layer formed above the transducer; and a layer of graphene formed on the nucleation layer. A method according to one embodiment includes forming a nucleation layer above a magnetic layer of a magnetic disk or magnetic device; and forming a layer of graphene on the nucleation layer. A method according to another embodiment includes depositing SiC above a magnetic layer of a magnetic disk or magnetic device, the SiC being equivalent to several monolayers thick; and surface heating the SiC to selectively evaporate some of the Si from the SiC for forming a layer of graphene on a SiC layer. Additional products and methods are also presented. | 06-23-2011 |
20120301746 | RADIATOR-COOLED NANOWIRE-BASED WRITE ASSIST - An apparatus for cooling a nanowire in a wire assisted magnetic recording head using a radiator in close proximity to a shield of the write pole. The radiator may further contain current restraints (e.g., slits, cuts, or resistive materials) that maximize current density in the nanowire at a location that corresponds to the current restraints. These current restraints may be further arranged to align with a write pole such that the current is forced to flow primarily through the nanowire when the nanowire is closest to the write pole. The nanowire may then be used either as main or auxiliary writing element for recording signals to a high coercivity media. Moreover, the nanowire and radiator may be combined into a single nanofoil which has a least two portions that perform a similar function as both the nanowire and radiator. | 11-29-2012 |
20140168812 | SPIN TORQUE OSCILLATOR (STO) READER WITH SOFT MAGNETIC SIDE SHIELDS - In one embodiment, a magnetic head includes a first shield; a spin torque oscillator (STO) sensor positioned above the first shield, the STO sensor comprising a reference layer and a free layer positioned above the reference layer; and at least one shield positioned in a plane that is parallel with a media-facing surface of the STO sensor, the plane also intersecting the STO sensor, wherein one or more of the at least one shield comprises a highly magnetically permeable material that is exchange decoupled and electrically decoupled from the STO sensor. Other magnetic heads, systems, and methods for producing the magnetic heads are described according to more embodiments. | 06-19-2014 |
20150248909 | STRUCTURE WITH SEED LAYER FOR CONTROLLING GRAIN GROWTH AND CRYSTALLOGRAPHIC ORIENTATION - According to one embodiment, a structure includes a substrate; an epitaxial seed layer positioned above the substrate, the epitaxial seed layer including a plurality of nucleation regions and a plurality of non-nucleation regions; and a crystalline layer positioned above the epitaxial seed layer, where the epitaxial seed layer has a crystallographic orientation substantially along an axis perpendicular to an upper surface of the substrate. | 09-03-2015 |
20160140991 | SELF-ASSEMBLED NANOPARTICLES WITH POLYMERIC AND/OR OLIGOMERIC LIGANDS - In one embodiment, a structure includes: a substrate; and a monolayer of nanoparticles positioned above the substrate, where the nanoparticles are each grafted to one or more oligomers and/or polymers, and where each of the polymers and/or oligomers includes at least a first functional group configured to bind to the nanoparticles. In another embodiment, a structure includes: a substrate; a structured layer positioned above the substrate, the structured layer comprising a plurality of nucleation regions and a plurality of non-nucleation regions; and a crystalline layer positioned above the structured layer, where the plurality of nucleation regions have a pitch in a range between about 5 nm to about 20 nm. | 05-19-2016 |
20160140994 | DIRECTED SELF-ASSEMBLY OF NANOPARTICLES WITH POLYMERIC AND/OR OLIGOMERIC LIGANDS - In one embodiment, a method includes: depositing a plurality of nanoparticles on a substrate; and forming a monolayer of the nanoparticles on the substrate via self-assembly, where each of the nanoparticles comprises a nanoparticle core grafted to one or more oligomers and/or polymers, where each of the polymers and/or oligomers includes at least a first functional group configured to bind to the nanoparticles. In another embodiment, a method includes: depositing a plurality of nanoparticles on a substrate; and forming a monolayer of the nanoparticles on the substrate via self-assembly, where the nanoparticles each comprise a nanoparticle core grafted to one or more oligomers and/or polymers, each of the polymers and/or oligomers including a first terminal functional group configured to bind to the nanoparticles, and an optional second terminal functional group configured to bind to the substrate, where the substrate comprises guiding features configured to direct the self-assembly of the nanoparticles. | 05-19-2016 |