Patent application number | Description | Published |
20090224342 | MAGNETORESISTIVE EFFECT ELEMENT AND MAGNETIC RANDOM ACCESS MEMORY - A magnetoresistive effect element includes a reference layer, a recording layer, and a nonmagnetic layer. The reference layer is made of a magnetic material, has an invariable magnetization which is perpendicular to a film surface. The recording layer is made of a magnetic material, has a variable magnetization which is perpendicular to the film surface. The nonmagnetic layer is arranged between the reference layer and the recording layer. A critical diameter which is determined by magnetic anisotropy, saturation magnetization, and switched connection of the recording layer and has a single-domain state as a unique stable state or a critical diameter which has a single-domain state as a unique stable state and is inverted while keeping the single-domain state in an inverting process is larger than an element diameter of the magnetoresistive effect element. | 09-10-2009 |
20120068285 | MAGNETORESISTIVE EFFECT ELEMENT, MAGNETIC MEMORY, AND METHOD OF MANUFACTURING MAGNETORESISTIVE EFFECT ELEMENT - According to one embodiment, a magnetoresistive effect element includes a first magnetic layer including perpendicular anisotropy to a film surface and an invariable magnetization direction, the first magnetic layer having a magnetic film including an element selected from a first group including Tb, Gd, and Dy and an element selected from a second group including Co and Fe, a second magnetic layer including perpendicular magnetic anisotropy to the film surface and a variable magnetization direction, and a nonmagnetic layer between the first magnetic layer and the second magnetic layer. The magnetic film includes amorphous phases and crystals whose particle sizes are 0.5 nm or more. | 03-22-2012 |
20120069640 | MAGNETORESISTIVE ELEMENT AND MAGNETIC MEMORY - A magnetoresistive element according to an embodiment includes: a first and second magnetic layers having an easy axis of magnetization in a direction perpendicular to a film plane; and a first nonmagnetic layer interposed between the first and second magnetic layers, at least one of the first and second magnetic layers including a structure formed by stacking a first and second magnetic films, the second magnetic film being located closer to the first nonmagnetic layer, the second magnetic film including a structure formed by repeating stacking of a magnetic material layer and a nonmagnetic material layer at least twice, the nonmagnetic material layers of the second magnetic film containing at least one element selected from the group consisting of Ta, W, Hf, Zr, Nb, Mo, Ti, V, and Cr, one of the first and second magnetic layers having a magnetization direction that is changed by applying a current. | 03-22-2012 |
20120241881 | MAGNETORESISTIVE ELEMENT AND MAGNETIC MEMORY - A magnetoresistive element according to an embodiment includes: a base layer; a first magnetic layer formed on the base layer, and including a first magnetic film having an axis of easy magnetization in a direction perpendicular to a film plane, the first magnetic film including Mn | 09-27-2012 |
20130288397 | MAGNETORESISTIVE EFFECT ELEMENT, MAGNETIC MEMORY, AND METHOD OF MANUFACTURING MAGENTORESISTIVE EFFECT ELEMENT - According to one embodiment, a magnetoresistive effect element includes a first magnetic layer including perpendicular anisotropy to a film surface and an invariable magnetization direction, the first magnetic layer having a magnetic film including an element selected from a first group including Tb, Gd, and Dy and an element selected from a second group including Co and Fe, a second magnetic layer including perpendicular magnetic anisotropy to the film surface and a variable magnetization direction, and a nonmagnetic layer between the first magnetic layer and the second magnetic layer. The magnetic film includes amorphous phases and crystals whose particle sizes are 0.5 nm or more. | 10-31-2013 |
20140077319 | MAGNETORESISTIVE EFFECT ELEMENT AND MANUFACTURING METHOD THEREOF - According to one embodiment, a magnetoresistive effect element includes a multilayer film including a transition metal nitride film, an antiferromagnetic film, a first ferromagnetic film, a nonmagnetic film, and a perpendicular magnetic anisotropic film stacked in that order. The first ferromagnetic film has a negative perpendicular magnetic anisotropic constant. Magnetization of the first ferromagnetic film is caused to point in a direction perpendicular to the film surface forcibly by an exchange-coupling magnetic field generated by the antiferromagnetic film. | 03-20-2014 |
20140159177 | MAGNETORESISTIVE ELEMENT AND MAGNETIC MEMORY - A magnetoresistive element according to an embodiment includes: a base layer; a first magnetic layer formed on the base layer, and including a first magnetic film having an axis of easy magnetization in a direction perpendicular to a film plane, the first magnetic film including Mn | 06-12-2014 |
20140264673 | MAGNETORESISTIVE ELEMENT AND MAGNETIC MEMORY - According to one embodiment, a magnetoresistive element includes a first magnetic layer having a variable magnetization direction; a second magnetic layer having an invariable magnetization direction; and a tunnel barrier layer provided between the first magnetic layer and the second magnetic layer and including an MgFeO film, wherein the MgFeO film contains at least one element selected from a group consisting of Ti, V, Mn, and Cu. | 09-18-2014 |
20140269038 | MAGNETIC MEMORY - A magnetic memory according to an embodiment includes at least one MTJ element, the MTJ element including: a magnetic multilayer structure including a first magnetic layer in which a direction of magnetization is fixed, a second magnetic layer in which a direction of magnetization is changeable, and a tunnel barrier layer located between the first and second magnetic layers; a first electrode provided on a first surface of the magnetic multilayer structure; a second electrode provided on a second surface of the magnetic multilayer structure; an insulating film provided on a side surface of the magnetic multilayer structure; and a control electrode provided on the side surface of the magnetic multilayer structure with the insulating film located therebetween, a voltage being applied to the control electrode in a read operation, which increases an energy barrier for changing the magnetization of the second magnetic layer. | 09-18-2014 |
20150076635 | MAGNETORESISTIVE ELEMENT AND MAGNETIC MEMORY - A magnetoresistive element according to an embodiment includes: a base layer; a first magnetic layer formed on the base layer, and including a first magnetic film having an axis of easy magnetization in a direction perpendicular to a film plane, the first magnetic film including Mn | 03-19-2015 |