12 results about "Magnetic layer" patented technology

A memory cell includes a magnetic cell junction having an antiferromagnetic layer within a portion of the cell junction that is adapted to characterize a logic state of a bit written to the junction. More specifically, a memory cell includes, an antiferromagnetic layer arranged in contact with an adjacent magnetic layer within a storing portion of a magnetic cell junction. Such a magnetic cell junction configuration and a method for programming a memory cell with such a cell junction configuration may be used to improve the write selectivity of a memory cell array and reduce the amount of current needed to write a bit to a memory cell. Moreover, a memory cell includes a magnetic cell junction having an aspect ratio less than 1.6. In addition, a memory cell includes at least two resistors.

A magnetic recording medium includes a first magnetic layer; and a second magnetic layer formed on the first magnetic layer. The first magnetic layer and the second magnetic layer make exchange coupling therebetween and also, have their magnetizing direction in anti-parallel to one another. A net residual area magnetization of the first magnetic layer and the second magnetic layer is expressed by the following formula: |Mr1×t1−Mr2×t2| where Mr1 and Mr2 denote respective residual magnetizations of the first magnetic layer and the second magnetic layer, and t1 and t2 denote respective film thicknesses of them; and the net area magnetization at a first temperature is larger than the net area magnetization at a second temperature lower than the first temperature.

A glass substrate for a magnetic recording medium, having a chamfer face between the surface (data face) of the substrate for forming thereon a film comprising a magnetic layer, and the outer peripheral end face (straight face) of the substrate, wherein the outer peripheral chamfer face has a dub-off of 120 Å or less in the radial direction.

The present invention provides a spin-valve type thin film magnetic element that is able to certainly align the magnetization direction of the free magnetic layer in one direction by improving the exchange coupling magnetic field generated between the bias layers and ferromagnetic layer, and is able to reduce the thickness of the bias layer to be smaller than the thickness of the bias layer of the conventional spin-valve type thin film magnetic element for obtaining the same magnitude of the exchange coupling magnetic layer as that in the conventional spin-valve type thin film magnetic element.

The magnetic recording medium comprises a first recording layer 16, a second recording layer 20 forming ferromagnetic coupling with the first recording layer, and an intermediate layer 18 formed between the first recording layer 16 and the second recording layer 20 and including non-magnetic layers 18a, 18b formed between the first recording layer 16 and the non-magnetic layer 18b and between the non-magnetic layer 18b and the second recording layer 20. Thus, the reproduction output of the vertical magnetic recording medium can be improved. The constitutions of the ferromagnetic layer and the non-magnetic layer of the intermediate layer are suitably controlled, whereby the S/N ratio of the vertical magnetic recording medium can be also improved.

The invention relates to an MLDH (magnetic layered double hydroxides)-Fluorescein intercalation assembled type fluorescent probe. The invention is characterized in that the MLDH-Fluorescein intercalation assembled type fluorescent probe is prepared by a low-temperature ion exchange reaction, with MLDH as carriers and fluorescein as an intercalation object. The synthesized MLDH-Fluorescein probe has superparamagnetism, bright fluorescence signals, high thermal stability, strong nuclear targeting property in cell transmission, and capability of quickly infiltrating a cell membrane and passing through cytoplasm to deliver a fluorescent material to cell nucleus and enrich the fluorescent material to a nucleolus, so that the MLDH-Fluorescein probe can be used as a fluorescent probe for researching a cell transport mechanism of an MLDH system and evaluating the nuclear targeting transmission efficiency. The MLDH-Fluorescein intercalation assembled type fluorescent probe is applicable to establishment of a fluorescein, fluorandiol marked medicament or biomolecular targeting transport system and has the advantages of bright fluorescence signals, high storage stability, integration of multiple functions, simplicity in operation, low cost and the like.

The invention discloses a magnetic tunnel junction forming method comprising the steps of providing a substrate on which a bottom electrode is formed; and forming a magnetic tunnel junction on the bottom electrode, wherein the magnetic tunnel junction is composed of a first magnetic layer, a tunneling layer and a second magnetic layer sequentially stacked from the bottom up, both the first magnetic layer and the second magnetic layer have vertical anisotropy, when a current from the second magnetic layer to the first magnetic layer exists, the magnetic moment direction of the second magnetic layer is the same as that of the first magnetic layer, and when the direction of the current is opposite, the magnetic moment direction of the second magnetic layer is opposite to that of the first magnetic layer; ferromagnetic particles are injected into the junction of the tunneling layer and the first magnetic layer; and the magnetic moment direction of the ferromagnetic particles is the same asthat of the first magnetic layer. According to the method, the tunneling resistance ratio of the magnetic tunnel junction is improved, the property of the magnetic layer is not changed, and thus thenegative effects are not generated on the other magnetoelectric parameters of the tunnel junction. The invention also discloses a magnetic resistance random access memory.

The invention belongs to the technical field of magnetic tunnel junctions, and particularly relates to a free layer of a magnetic tunnel junction, the magnetic tunnel junction and a spin transfer torque magnetic random access memory. The free layer provided by the invention comprises a first ferromagnetic layer, a spacing layer and a second ferromagnetic layer which are in contact in sequence; the thickness of the first ferromagnetic layer and the thickness of the second ferromagnetic layer are both smaller than or equal to 1 nm, and the thickness of the second ferromagnetic layer is smaller than that of the first ferromagnetic layer. The spacer layer comprises at least two non-magnetic elements. According to the invention, the thickness of the first ferromagnetic layer and the second ferromagnetic layer in the free layer structure is controlled to be less than 1nm, so that the STT efficiency is effectively improved, and the write-in current is reduced; meanwhile, the spacer layer in the free layer structure is composed of at least two different non-magnetic elements, and the two elements have high binding energy, so that the stability of the spacer layer structure is ensured, element diffusion caused by thickness reduction of the magnetic layer is inhibited, and the erasing resistance is improved.

The invention discloses a common mode filter and electronic equipment. The common-mode filter comprises a dielectric layer, and a first magnetic layer, a first electrode layer, a second electrode layer, a third electrode layer, a fourth electrode layer and a second magnetic layer which are stacked in sequence. Every two adjacent layers are isolated through a dielectric layer; the second electrode layer comprises a first sub-coil and a second sub-coil which are insulated, and the two coils surround in the same direction and are electrically connected with the input electrode on the first side; the third electrode layer comprises a third sub-coil and a fourth sub-coil which are insulated, the two coils surround in the same direction and are electrically connected with the output electrode on the second side, the third sub-coil is electrically connected with the first sub-coil, and the fourth sub-coil is electrically connected with the second sub-coil; the second side and the first side are oppositely arranged; the first electrode layer is electrically connected with the fourth electrode layer. According to the invention, the filtering effect of common-mode noise can be improved, and the signal loss can be reduced.

Provided is a magnetic recording medium, which is a magnetic recording medium for microwave-assisted recording and includes a non-magnetic support; and a magnetic layer including a ferromagnetic powder and a binding agent on the non-magnetic support, in which the magnetic layer shows a natural ferromagnetic resonance frequency equal to or greater than 30.0 GHz and an anisotropic magnetic field distribution equal to or smaller than 35%.