Abstract:
Methods, devices, and compositions for use with spintronic devices such as magnetic random access memory (MRAM) and spin-logic devices are provided. Methods include manipulating magnetization states in spintronic devices and making a structure using spin transfer torque to induce magnetization reversal. A device described herein manipulates magnetization states in spintronic devices and includes a non-magnetic metal to generate spin current based on the giant spin Hall effect, a ferromagnetic thin film with perpendicular magnetic anisotropy, an oxide thin film, and an integrated magnetic sensor. The device does not require an insertion layer between a non-magnetic metal with giant spin Hall effect and a ferromagnetic thin film to achieve perpendicular magnetic anisotropy.
Abstract:
The invention concerns a thin-layered magnetic device comprising, on a substrate, a composite assembly deposited by cathode spraying and composed of a magnetic layer (2) made from a material having high perpendicular magnetic anisotropy, the magnetization of which, in the absence of any electrical or magnetic interaction, is located outside the plane of said layer, a magnetic layer (3) in direct contact with the preceding magnetic layer (2), made from a ferromagnetic material with a high spin polarization rate, the magnetization of which, in the absence of any electrical or magnetic interaction, is located inside the plane of this layer, the direct magnetic coupling of this layer with said magnetic layer (2) inducing a reduction in the effective demagnetizing field of the assembly composed of the two magnetic layers (2) and (3), and a nonmagnetic layer (4) in direct contact with the preceding magnetic layer (3), made from a material that is non-depolarizing for the electrons passing through the device. The device includes means for passing an electric current through itself, in a direction substantially perpendicular to the plane of the layers.
Abstract:
A magnetic storage media (18, 38) comprises a substrate (20, 40) supporting the layer of magnetic media ( 28, 48) having a tilted C-axis greater than approximately 25° with respect to surface normal and having a magnetic easy axis tilted at an angle at approximately greater than 30° from the substrate surface normal. The media includes an oblique deposited seedlayer structure (22, 42) directing tilted C-axis growth of the magnetic material layer independent of the angle of deposition of the magnetic material layer. The orientation C-axis and the magnetic easy axis of the media may be organized into circumferential or radial patterns on the substrate surface, and additionally may possess azimuthal symmetry.
Abstract:
軟磁性材料で形成された非結晶下地膜と、(Fe x Co 1-x ) y (M) 1-y (ここで、0.65≦x≦0.75、0<1−y≦0.05であり、MはMg、Al、SiおよびTiの酸化物および窒化物からなる群より選択される少なくとも1種を示す。)で表される組成を有する膜との積層膜を含む高飽和磁束密度軟磁性材料。
Abstract:
According to one embodiment, a magnetoresistive element includes a recording layer having magnetic anisotropy perpendicular to a film surface and having a variable magnetization direction, a reference layer having magnetic anisotropy perpendicular to a film surface and having an invariable magnetization direction, an intermediate layer provided between the recording layer and the reference layer, and a underlayer containing AlTiN and provided on an opposite side of a surface of the recording layer on which the intermediate layer is provided.
Abstract:
A magnetic sensor has a bottom shield layer, an upper shield layer, and a sensor stack adjacent the upper shield layer. The sensor includes a seed layer between the bottom shield layer and an antiferromagnetic layer of the sensor stack. The seed layer has a magnetic layer adjacent the sensor stack and a nonmagnetic layer adjacent the bottom shield layer.
Abstract:
A method and System for providing a magnetic element that can be used in a magnetic memory is disclosed. The magnetic element includes pinned, nonmagnetic spacer, and free layers. The spacer layer resides between the pinned and free layers. The free layer can be switched using spin transfer when a write current is passed through the magnetic element. The magnetic element may also include a barrier layer, a second pinned layer. Alternatively, second pinned and second spacer layers and a second free layer magnetostatically coupled to the free layer are included. At least one free layer has a high perpendicular anisotropy. The high perpendicular anisotropy has a perpendicular anisotropy energy that is at least twenty and less than one hundred percent of the out-ofplane demagnetization energy.
Abstract:
A perpendicular exchange biased device (10) comprises a layer of buffer material (14) on a surface of a substrate (12), a layer offerromagnetic material (18) on a surface of the buffer layer, wherein the magnetization of the ferromagnetic layer lies in a direction perpendicular to the plane of the layer of ferromagnetic material, and a layer of antiferromagnetic material (22) on a surface of the layer of ferromagnetic material. A method of making a perpendicular exchange biased device comprising positioning a layer of buffer material on a surface of a substrate, positioning a layer of ferromagnetic material on a surface of the layer of buffer material, wherein the magnetization of the ferromagnetic layer lies in a direction perpendicular to the plane of the layer of ferromagnetic material, and positioning a layer of antiferromagnetic material on a surface of the layer of ferromagnetic material is also included.