Magnetoresistive element

摘要

According to one embodiment, a magnetoresistive element includes first, second and third magnetic layers, and first and second nonmagnetic layers. The third magnetic layer has stack layers including a first stack layer close to the second magnetic layer, and a second stack layer far from the second magnetic layer. Each of the first and second stack layers includes a first layer made of a ferromagnetic material and a second layer made of a nonmagnetic material, and a first ratio of a film thickness of the first layer to that of the second layer in the first stack layer is higher than a second ratio of a film thickness of the first layer to that of the second layer in the second stack layer.

主权项

1. A magnetoresistive element comprising:
a first magnetic layer; a second magnetic layer; a third magnetic layer; a first nonmagnetic layer formed between the first magnetic layer and the second magnetic layer; and a second nonmagnetic layer formed between the second magnetic layer and the third magnetic layer, wherein: the third magnetic layer has a structure in which stack layers are stacked, the stack layers include a first stack layer close to the second magnetic layer, and a second stack layer which is farther from the second magnetic layer than the first magnetic layer is, each of the first stack layer and the second stack layer includes a first layer made of a ferromagnetic material and a second layer made of a nonmagnetic material, a first ratio of a film thickness of the first layer to a film thickness of the second layer in the first stack layer is higher than a second ratio of a film thickness of the first layer to a film thickness of the second layer in the second stack layer, a saturation magnetization of the first stack layer is larger than a saturation magnetization of the second stack layer, and an anisotropic magnetic field of the second stack layer is larger than an anisotropic magnetic field of the first stack layer.