摘要:
A magneto-resistive device includes first and second ferromagnetic layers having different coercivities, and a spacer layer between the first and second layers. Each ferromagnetic layer has a magnetization that can be oriented in either of two directions.
摘要:
This invention provides a soft-reference magnetic memory digitizing device. In a particular embodiment the digitizing device includes an array of soft-reference magnetic memory cells. Each memory cell has at least one ferromagnetic sense layer characterized by an alterable orientation of magnetization, the orientation changing upon the substantially proximate application of at east one externally-applied magnetic field as may be provided by a magnetically tipped stylus. Each memory cell also provides at least one ferromagnetic soft-reference layer having a non-pinned orientation of magnetization. An intermediate layer forming a magnetic tunnel junction is placed between the sense layer and soft-reference layer. The orientation of the sense layer is not substantially affected by the soft-reference layer. A related method of use involving a magnetic stylus is also provided.
摘要:
An exemplary nonvolatile memory array comprises a substrate and a plurality of memory cells formed on the substrate, each of the memory cells being addressable via at least first and second conductors during operations. An exemplary memory cell in the exemplary memory array includes a ferromagnetic annular data layer having an opening, the opening enabling the second conductor to electrically contact the first conductor, an intermediate layer on at least a portion of the annular data layer, and a soft reference layer on at least a portion of the intermediate layer.
摘要:
A memory device includes a data layer having a magnetization that can be oriented in first and second directions; and a synthetic ferrimagnet reference layer. The data and reference layers have different coercivities.
摘要:
A magnetic memory cell having read conductor that is wholly clad with a high magnetic permeability soft magnetic material for a pinned-on-the-fly soft ferromagnetic reference layer is disclosed. The magnetic memory cell includes a ferromagnetic data layer, an intermediate layer formed on the ferromagnetic data layer, and a soft ferromagnetic reference layer formed on the intermediate layer. The soft ferromagnetic reference layer includes a read conductor and a ferromagnetic cladding that completely surrounds the read conductor to form a cladded read conductor. The soft ferromagnetic reference layer has a non-pinned orientation of magnetization. When an externally supplied read current flows through the read conductor, the read conductor generates a magnetic field that does not saturate the ferromagnetic cladding and is substantially contained within the ferromagnetic cladding and is operative to dynamically pin the orientation of magnetization in a desired direction. Optionally, the soft ferromagnetic reference layer can include a ferromagnetic cap layer positioned between the ferromagnetic cladding and the intermediate layer and magnetically coupled with the ferromagnetic cladding. A bit of data stored in the ferromagnetic data layer is read by measuring a resistance between the ferromagnetic data layer and the soft ferromagnetic reference layer. The ferromagnetic cladding substantially reduces fringe magnetic fields, reduces the number and complexity of the of layers needed to form a prior pinned reference layer, and reduces a magnitude of the read current sufficient to read the bit of data.
摘要:
A memory device includes dual tunnel junction memory cells having a magnetic tunnel junction in series with a tunnel junction. The magnetic tunnel junction can be changed from a first resistance state to a second resistance state during a write operation. The magnetic tunnel junction can have a differing resistance-voltage characteristic than the tunnel junction, and the differing resistance-voltage characteristics allow the magnetic tunnel junction to be blown without blowing the tunnel junction during a write operation. The change in resistance state of the magnetic tunnel junction changes the resistance of the selected memory cell, which is detectable during a read operation.
摘要:
Apparatus and associated method for aligning optical components including lenses, filters, lasers, fiber optics, etc. The apparatus aligns a first optic element and a second optic element and includes a frame and a sleeve. The frame defines a frame bore along a longitudinal axis thereof. The sleeve defines an eccentric bore configured to contain the first optic element or the second optic element. The sleeve is rotatably coupled in the frame bore to align the first optic element with the second optic element in a plane intersected by the longitudinal axis.
摘要:
A magnetic memory cell having read-write conductor that is wholly clad with a high magnetic permeability soft magnetic material for a pinned-on-the-fly soft ferromagnetic reference layer is disclosed. The magnetic memory cell includes a ferromagnetic data layer, an intermediate layer formed on the ferromagnetic data layer, and a soft ferromagnetic reference layer having a non-pinned orientation of magnetization formed on the intermediate layer. The soft ferromagnetic reference layer includes a read-write conductor and a ferromagnetic cladding that completely surrounds the read-write conductor to form a cladded read-write conductor. During a read operation, a read current flowing through the read-write conductor generates a read magnetic field that does not saturate the ferromagnetic cladding. During a write operation, a write current flowing through the read-write conductor generates a write magnetic field that saturates the ferromagnetic cladding and extends to the ferromagnetic data layer.
摘要:
A small-sized, inexpensive light wavelength measuring apparatus which has no mechanical movable sections but which is capable of high-speed measurement and high measurement precision to improve in reliability. In the light wavelength measuring apparatus, the intensity of incoming light is modulated by a light modulator in response to a reference signal supplied from a signal source and the modulation light is provided with a delay corresponding to the wavelength thereof through a group delay dispersion medium. The light is then converted into an electrical signal by a photoelectric converter, and a phase difference between the electrical signal and reference signal is obtained by a phase comparator, thereby measuring the wavelength of the incoming light.
摘要:
A method and apparatus of detecting and using motion modes in a mobile device is described. Movement data is collected from an inertial motion unit (IMU) of the mobile device and compared to two or more sets of training data, each set of training data corresponding to a different motion mode. Then, a motion mode is determined to be the current mode of the mobile device on the results of the comparison. The motion mode is used by the mobile device in a variety of applications.