Abstract: The embodiments disclosed generally relate to an STO structure for a magnetic head. The STO structure has an FGL having a greater thickness than the SPL. The SPL may have multiple layers. In one embodiment, a MAMR head comprises a main pole; a trailing shield; and an STO coupled between the main pole and the trailing shield. The STO includes: a first magnetic layer having a first thickness; a non-magnetic spacer layer coupled to the first magnetic layer; and a second magnetic layer having a second thickness and coupled to the non-magnetic spacer layer, wherein the first thickness is greater than the second thickness, wherein a current is charged from the first magnetic layer to the second magnetic layer, and wherein a vertical magnetic anisotropy field of the second magnetic film is less than 0 kOe.

Abstract: The embodiments disclosed generally relate to an STO structure for a magnetic head. The STO structure has an FGL having a greater thickness than the SPL. The SPL may have multiple layers. In one embodiment, a MAMR head comprises a main pole; a trailing shield; and an STO coupled between the main pole and the trailing shield. The STO includes: a first magnetic layer having a first thickness; a non-magnetic spacer layer coupled to the first magnetic layer; and a second magnetic layer having a second thickness and coupled to the non-magnetic spacer layer, wherein the first thickness is greater than the second thickness, wherein a current is charged from the first magnetic layer to the second magnetic layer, and wherein a vertical magnetic anisotropy field of the second magnetic film is less than 0 kOe.

Abstract: The present disclosure generally relates to a structure for a perpendicular microwave-assisted magnetic recording head used in a magnetic disk drive. A first spin-torque oscillator and a second spin-torque oscillator are positioned between the main pole of a recording head and a trailing shield, and are separated by a spin torque shield layer. The first spin-torque oscillator comprises a first magnetic layer, a first non-magnetic interlayer, and a second magnetic layer. The second spin-torque oscillator comprises a third magnetic layer, a second non-magnetic interlayer, and a fourth magnetic layer. An applied current is adapted to flow in a direction from the second magnetic layer to the first magnetic layer, and from the fourth magnetic layer to the third magnetic layer.

Abstract: Embodiments described herein generally relate to a magnetic recording device for recording/reproducing data using the magnetization state of a recording medium. More specifically, embodiments described herein provide an STO structure having an SPL and an FGL with an anti-ferromagnetic coupling interlayer disposed between the SPL and FGL. The anti-ferromagnetic coupling interlayer may enable the STO structure to obtain a high assist effect even when operated with a low conducting current.

Abstract: Embodiments of the present invention generally relate to a MAMR head. The MAMR head includes an STO. The STO has a first surface at a media facing surface, a second surface that is opposite the first surface and a third surface adjacent to the first and second surfaces. The first and third surfaces form a first acute angle and the second and third surfaces form a second acute angle, where the second acute angle is less than or equal to the first acute angle. Having this configuration, the electrical current going through the STO is substantially perpendicular to the STO, which causes the spin torque to be maximized.