Patent ID: 8207806
Filing Date: 2012-06-26
Classification: H01L,H03B

Abstract:
1. A magnetic oscillation element comprising: a magnetic free layer having a variable magnetization direction; a magnetic pinned layer having an invariable magnetization direction; a spacer layer between the magnetic free layer and the magnetic pinned layer; and a magnetic field generator which applies an external magnetic field to the magnetic free layer, wherein the magnetization directions of the magnetic free layer and the magnetic pinned layer are parallel to junction planes between the magnetic free layer and the spacer layer and between the magnetic pinned layer and the spacer layer, the magnetic free layer has a uniaxial magnetic anisotropy, and generates a magnetization oscillation when a current larger than an oscillation threshold current flows through the magnetic free layer, the magnetic field generator controls a magnitude and a direction of the external magnetic field to cancel a shift amount of an oscillation frequency caused by a diamagnetic field due to the magnetization oscillation and a shift amount of the oscillation frequency caused by a magnetic field due to the uniaxial magnetic anisotropy, and an angle θ between a direction as a center of the magnetization oscillation of the magnetic free layer and the magnetization direction of the magnetic pinned layer is within ranges 0°≦θ≦70° and 110°≦θ≦180°.