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6436560 |
Magnetic head and magnetic disk device using the same
A magnetic head comprises: an induction type head for recording including a lower magnetic core, a writing gap film formed on the lower magnetic core, an upper magnetic core having a track portion...
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6433545 |
Method for evaluating signals of magnetoresistive sensors with high band width
The invention relates to a method for evaluating signals while eliminating an interference signal on magnetoresistive sensor elements which is preferably proportional to the zero offset. The sensor...
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6427349 |
Compensation system for electronic compass
An electronic compass is described for use in vehicles. The compass employs a magnetoresistive sensor for sensing the earth magnetic field and the sensor is operated in alternate set/reset bias...
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6430012 |
Magnetoresistance effect film and magnetoresistance effect type head having specified antiferromagnetic promote layer
In a spin valve type magnetoresistance effect film, an antiferromagnetization promote layer is formed on a surface of an antiferromagnetic layer remote from a surface thereof abutting a...
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6429640 |
GMR high current, wide dynamic range sensor
A configuration where a wide range of current can be sensed accurately in spite of using a magnetic material with non-linearities and limited hysteresis. This configuration includes: a strip line...
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6411086 |
Differential solenoidal magnetic field sensing device and method for manufacturing the same
A differential solenoidal magnetic field sensing device is a magnetic field sensor fabricated on a microscopic scale and is constructed by two soft magnetic film cores laminated on a semiconductor...
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6404191 |
Read heads in planar monolithic integrated circuit chips
A plurality of magnetic field sensing structures in a monolithic integrated circuit chip structure to provide output signals at outputs thereof of magnetic field changes provided therein from...
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6400535 |
Magnetoresistive effect multi-layered structure and thin-film magnetic head with the magnetoresistive effect multi-layered structure
A MR multi-layered structure or a thin-film magnetic head with the MR multi-layered structure includes a non-magnetic electrically conductive material layer, first and second ferromagnetic material...
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6395388 |
Magnetoresistance effect element
The present invention provides an exchange coupling film having a stacked-film-structure consisting of a ferromagnetic film made of at least one material of Fe, Co and Ni, and an antiferromagnetic...
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6391483 |
Magnetic device and method of forming same
A device including a magnetic material having a magnetization configuration that is circular in a plane, and a word line for producing a magnetic field in the plane, the magnetic field being radial...
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6387548 |
Exchange coupling film and magnetoresistance effect type element using this exchange coupling film, and thin film magnetic head using the magnetoresistance effect type element
The antiferromagnetic layer 4 is formed of the X—Mn alloy (X is an platinum group element) and the interface structure of with the pinned magnetic layer 3 is made to be non-coherent by...
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6387550 |
Giant magnetoresistive material film, method of producing the same and magnetic head using the same
A giant magnetoresistive material film includes at least two ferromagnetic layers of a NiFe alloy or NiFeCo alloy, which are formed on a substrate through a nonmagnetic layer of Au, Ag, Cu or Cr,...
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6387549 |
Magnetic sensor
A high-sensitivity magnetic sensor capable of detecting a nonequilibrium spin, uses an almost-spin-polarized ferromagnetic oxide in a high-quality trilayer arrangement including an intermediate...
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6384600 |
Magnetic field sensor comprising a spin tunneling junction element
A strongly miniaturizable magnetic field sensor is based on four spin tunnel junctions, together forming a Wheatstone bridge. The magnetically sensitive electrode functions as well as a laminated...
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6376933 |
Magneto-resistive signal isolator
Signal isolator circuits using one or more magneto-resistive sensors are disclosed. In a first embodiment, a magneto-resistive sensor is used to sense an input magnetic field. A feedback circuit...
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6376108 |
Magnetic material and magnetic head using the same and magnetic storage device having thereof
This invention is to provide a magnetic head consisting of NiFeMo alloy which assures excellent high frequency characteristic and makes easy formation of magnetic domain structure without any heat...
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6373247 |
Magnetoresistive sensor element with selective magnetization direction of the bias layer
A magnetoresistive sensor element, in particular an angle sensor element, has a first, magnetic layer ( 3 ) whose direction of magnetization represents a reference direction, a second, nonmagnetic...
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6374131 |
Biomagnetism measuring method and apparatus
A technique for accurately determining states of bioelectric currents occurring in particular positions in a site of interest of a patient. Transfer functions between the particular positions and...
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6373242 |
GMR sensor with a varying number of GMR layers
A position sensor for non-contact position measurement includes a sensor magnet and a sensor body. The sensor body is formed from a magneto-resistive material and is given a two or three...
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6369993 |
Magnetoresistance effect sensor and magnetoresistance detection system and magnetic storage system using this sensor
A shielded magnetoresistance (MR) effect sensor includes the following layers that are laminated in sequence: a lower shielding layer, a lower gap layer, a MR effect device, a vertical bias layer...
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6366420 |
Method of restoring the orientation of a pinned layer of a magnetoresistive head
Magnetoresistive, MR, heads and giant magnetoresistive, GMR, heads are used in hard disk drive storage systems. The heads have a pinned layer whose magnetic orientation, if incorrect, gives rise to...
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6361863 |
Device having magnetoresistive material
A device comprising a magnetoresistive material including a mixture of powdered CrO 2 having granules at least partially coated with Cr 2 O 3 , and powdered Ni, the mixture being compressed to...
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6356420 |
Storage system having read head utilizing GMR and AMr effects
A data storage system includes a storage medium having a data surface with data storage thereon, the stored data comprises variations in magnetic fields across the data surface. A magnetoresistive...
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6356074 |
Magnetoresistive detector with multiple bias magnets for biasing its magnetoresistive elements
The magnetoresistive detector of the present invention uses magnetoresistive elements for detecting changes in the magnetic field of a moving magnet 3 which changes a magnetic field, wherein bias...
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6353317 |
Mesoscopic non-magnetic semiconductor magnetoresistive sensors fabricated with island lithography
Mesoscopic magnetic field sensors which can detect weak magnetic fields (typically 0.05 Tesla) over areas as small as tens of thousands of square nanometers (e.g. 40 nm×400 nm). The combination of...
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6353316 |
Magneto-resistive element and thin film magnetic head comprising the same
A magnetoresistive film through which a sense current for detecting a resistance change due to a magnetic field to be detected flows in a longitudinal direction, and a lateral bias film which is...
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6353318 |
Magnetoresistive sensor having hard biased current perpendicular to the plane sensor
The apparatus of the present invention is embodied in a magnetic field sensor having a magnetoresistive element, a magnetic bias layer for biasing the magnetoresistive element with a magnetic...
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6346810 |
Electric motor control using temperature and magnetic field strength variation of its stator liminations
A sensor for facilitating the measurement of temperature and magnetic field is described. The sensor comprises an optical cable having a distal end encompassed in a sheath of giant magnetoresistive...
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6346811 |
Methods for mounting a sensor and signal conditioner to form sensing apparatus having enhanced sensing capabilities and reduced size
A compact sensing apparatus having reduced cross section and methods are provided for sensing the magnitude and direction of an electrical or magnetic field. The compact sensing apparatus and...
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6344743 |
Standing wave magnetometer
The invention uniquely avails of Fourier analytical principles for determining the distribution of a magnetic field in a one-dimensional (linear), two-dimensional (planar) or three-dimensional...
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6340886 |
Magnetic field sensor with a plurality of magnetoresistive thin-film layers having an end at a common surface
A magnetic field sensing structure for sensing magnetic field changes provided therein having a pair of pole structures with a gap space between them that each include permeable material and end in...
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6339330 |
Magnetic head
A magnetic sensor is constructed to be capable of detecting the change of tunnel current due to co-tunneling effect at a high S/N ratio by using a tunneling magneto-resistive element having a first...
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6339329 |
Method for manufacturing a giant resistive ratio (GMR) bridge detector and a magnetoresistive bridge detector
A method for manufacturing a GMR bridge detector as well as the bridge detector itself in which magnetoresistive resistors are interconnected in the form of a bridge to detect a magnetic field. The...
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6331773 |
Pinned synthetic anti-ferromagnet with oxidation protection layer
Good magnetic, wear, and corrosion properties are required of a pinned synthetic anti-ferromagnet used in a top spin valve magnetoresistive sensor for reading magnetic media. The pinned synthetic...
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6329818 |
Magnetic field sensor having giant magnetoresistive effect elements, manufacturing method and apparatus therefor
The present invention is characterized in that a first giant magnetoresistive effect element and a second giant magnetoresistive effect element are provided along a first straight line with the...
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6326092 |
Magnetoresistance device and production method thereof
A magnetoresistance device comprising at least two ferromagnetic layers separated by a non-magnetic layer, the coercive force of one of the ferromagnetic layers being enhanced by a coercive force...
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6324029 |
Method and system for GMR sensor reset pulse application
A method and system are disclosed for controlling the application of a reset voltage pulse to a GMR sensor in a direct-access storage device (DASD), such that existing data is not damaged or...
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6323644 |
Rotation sensor
The present invention improves the sensitivity and expands the temperature range of operation of a magnetic detection device used in conjunction with rotary shafts such as those found in...
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6319622 |
Magnetic head
Magnetoresistive and spin valve heads have a layered structure. Common to each of the layered structures of these heads is the combination of a soft-magnetic layer of essentially NiFe near a spacer...
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6313627 |
Sensor device for detecting the direction of an external magnetic field using a magnetoresistive sensor element
A sensor device for detecting the direction of an external magnetic field using a magnetoresistive sensor element, includes a GMR multilayer system having at least one soft magnetic measurement...
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6307366 |
Object position sensor using magnetic effect device
A position sensor comprising a scale structure 7 having magnetic poles positioned with a predetermined distance alternatively magnetized poles one to another, at least two magnetic sensing elements...
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6304083 |
Magnetic field sensor with colossal magneto-resistive material contained within the coil of an oscillator
Sensors, systems and methods for measuring magnetic field strengths in both AC and DC magnetic fields by using CMR material in tunable, radio-frequency LC oscillators are disclosed.
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6304082 |
Printed circuit boards multi-axis magnetometer
A multi-axis magnetometer is provided having three magnetic field sensing circuits for sensing a magnetic field along the X, Y and Z axes. Each magnetic field sensing circuit includes an...
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6300617 |
Magnetic digital signal coupler having selected/reversal directions of magnetization
A current determiner having an output at which representations of input currents are provided comprising an input conductor for the input current and a current sensor supported on a substrate...
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6297630 |
Method and device for measuring the distribution of magnetic fields
A process permits the determination of multi-dimensional distribution of magnetic fields. The process uses a magneto-resistive sensor as a physical measuring device. The measuring device is coupled...
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6297628 |
Magnetoresistive bridge array
An interleaved parallel MR bridge array is optimized for sensing fine pitch ring magnets and can be utilized to reduce ring magnet target size for wheel speed sensing applications.
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6294911 |
Measurement method of magnetization direction of magnetoresistive effect devices and measurement apparatus based on the method of TDK corporation
A method of measuring magnetization direction of a MR device, includes a first step of obtaining both maximum electrical resistance values under positive and negative applied measurement magnetic...
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6291993 |
Magnetic field sensor and method for making same
A magnetic sensor having a layer of nonmagnetic insulator including at least one layer of ferromagnetic particles. This combination of layers is sandwiched between two ferromagnetic electrodes....
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6285101 |
Rotational angle detector for brushless motor and brushless motor using the detector
A detector for the rotational angle of a motor and a small brushless or stepping motor having the detector built therein are disclosed. A sensor probe of the detector is provided with a wire...
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6275033 |
Magnetic field sensor having nickel oxide and cobalt containing ferromagnetic layers
A magnetic field sensor comprising a layered structure (3) E/F o /S/F, in which: E is an exchange-biasing layer, comprising nickel oxide; F o is a ferromagnetic layer with a fixed magnetization,...
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