BACKGROUND OF THE DISCLOSURE

Field of the Disclosure

Aspects of the present disclosure generally relate to a magnetic recording head of a spintronic device, such as a write head of a data storage device, for example a magnetic media drive.

Description of the Related Art

The heart of the functioning and capability of a computer is the storing and writing of data to a data storage device, such as a hard disk drive (HDD). The volume of data processed by a computer is increasing rapidly. There is a need for higher recording density of a magnetic recording medium to increase the function and the capability of a computer.

In order to achieve higher recording densities, such as recording densities exceeding 2 Tbit/in2for a magnetic recording medium, the width and pitch of write tracks are narrowed, and thus the corresponding magnetically recorded bits encoded in each write track is narrowed. One challenge in narrowing the width and pitch of write tracks is decreasing a surface area of a main pole of the magnetic write head at a media facing surface (MFS). As the main pole becomes smaller, the writing field becomes smaller as well, limiting the effectiveness of the magnetic write head.

Heat-assisted magnetic recording (HAMR) and microwave-assisted magnetic recording (MAMR) are two types of energy-assisted recording technology to improve the recording density of a magnetic recording medium, such as a HDD. In MAMR, a spin torque oscillator (STO) device is located next to or near the write element in order to produce a high-frequency AC field, such as in a microwave frequency band. The high-frequency AC field reduces an effective coercivity of a magnetic recording medium used to store data and allows writing of the magnetic recording medium at lower magnetic writing fields emanated from the write pole. Thus, higher recording density of the magnetic recording medium may be achieved by MAMR technology.

Energy-assisted recording write heads may require an undesirable high voltage and/or an undesirable high current to produce a write field enhancement. A high voltage and/or high current may impact the lifetime and the reliability of the write head by degrading components of the write head. Lowering the voltage or the current, moment-thickness product of the energy-assist magnetic layer, can hinder writer performance, lower areal density capability (ADC), and/or limit the materials used in write heads.

Therefore, there is a need for write heads that simply and effectively facilitate write head performance reliability and high moment-thickness product of the energy-assist magnetic layer while facilitating lower voltage or current to facilitate effective and efficient magnetic recording, and high ADC of magnetic recording.

SUMMARY OF THE DISCLOSURE

Aspects of the present disclosure generally relate to a magnetic recording head of a magnetic media drive. In one example, a magnetic recording head includes a main pole, a trailing shield, and spintronic device disposed between the main pole and the trailing shield. The spintronic device comprises a negative polarization layer (NPL) disposed on the main pole, the NPL comprising FeTi, FeV, FeCr, or FeN, an interface layer disposed on the NPL, the interface layer comprising V, Cr, or Ru, a spacer layer disposed on the interface layer, and a field generating layer (FGL) disposed on the spacer layer. When current is applied to the spintronic device, the NPL and a first interface disposed between the NPL and the interface layer have a negative spin polarization while the FGL and a second interface disposed between the FGL and the spacer layer have a positive spin polarization.

In one embodiment, a magnetic recording head comprises a main pole, a trailing shield, and a spintronic device disposed between the main pole and the trailing shield. The spintronic device comprises a negative polarization layer disposed on the main pole, the negative polarization layer comprising Fe and one of Ti, V, Cr, or N, an interface layer disposed on the negative polarization layer, the interface layer comprising V, Cr, or Ru, a first spacer layer disposed on the interface layer, and a field generating layer disposed on the first spacer layer.

In another embodiment, a magnetic recording head comprises a main pole, a trailing shield, and a spintronic device disposed between the main pole and the trailing shield. The spintronic device comprises a negative polarization layer disposed on the trailing shield, the negative polarization layer comprising Fe and at least one of Ti, V, Cr, or N, an interface layer disposed on the negative polarization layer, the interface layer comprising Cr, V, or Ru, a first interface defined between the negative polarization layer and the interface layer, a first spacer layer disposed on the interface layer, a field generating layer disposed on the first spacer layer, and a second interface defined between the first spacer layer and the field generating layer. The magnetic recording head further comprises a current source configured to apply a current through the spintronic device.

In another embodiment, a magnetic recording head comprises a main pole, a trailing shield, and a spintronic device disposed between the main pole and the trailing shield. The spintronic device comprises a negative polarization layer disposed on the main pole, the negative polarization layer comprising Fe and at least one of Ti, V, Cr, or N, an interface layer disposed on the negative polarization layer, the interface layer comprising Cr, V, or Ru, a first interface defined between the negative polarization layer and the interface layer, a first spacer layer disposed on the interface layer, a field generating layer disposed on the first spacer layer, and a second interface defined between the first spacer layer and the field generating layer. The magnetic recording head further comprises means for applying a current through the spintronic device, wherein the negative polarization layer and the first interface have a negative spin polarization and the field generating layer and the second interface have a positive spin polarization when current is applied.

