STORAGE ELEMENT, STORAGE APPARATUS, AND MAGNETIC HEAD

摘要

There is provided a storage element including a layered construction including a storage layer that has magnetization perpendicular to a surface of the storage layer and whose direction of magnetization is changed corresponding to information, a pinned magnetization layer that has magnetization perpendicular to a surface of the pinned magnetization layer and serves as a standard for information stored in the storage layer, and an insulating layer that is composed of a non-magnetic material and is provided between the storage layer and the pinned magnetization layer.

主权项

1. A storage element comprising:
a layered construction including a storage layer that has magnetization perpendicular to a surface of the storage layer and whose direction of magnetization is changed corresponding to information, a pinned magnetization layer that has magnetization perpendicular to a surface of the pinned magnetization layer and serves as a standard for information stored in the storage layer, and an insulating layer that is composed of a non-magnetic material and is provided between the storage layer and the pinned magnetization layer, wherein recording of information in the storage layer is carried out by changing the direction of magnetization of the storage layer by injecting spin-polarized electrons in a laminating direction of the layered construction, wherein the pinned magnetization layer has a laminated ferri-pinned construction composed of at least two ferromagnetic layers and a non-magnetic layer, wherein a magnetic material in the pinned magnetization layer that contacts the insulating layer is configured using a CoFeB magnetic layer, and wherein a magnetic material in the pinned magnetization layer that does not contact the insulating layer is one of an alloy and a laminated structure using at least one type of each of a Pt group metal element and a ferromagnetic 3d transition metal element that is a ferromagnetic element out of 3d transition metal elements, and an atomic concentration of the Pt group metal element is lower than an atomic concentration of the ferromagnetic 3d transition metal element.