MAMR recording head with SAF trailing shield notch and/or bump

A magnetic recording head, comprising:

• a main pole having a first height extending from a media facing surface (MFS) into the magnetic recording head;
• a trailing shield;
• a trailing gap disposed between the main pole and the trailing shield;
• a spin torque oscillator disposed in contact with the main pole in the trailing gap, the spin torque oscillator having a second height extending from the MFS into the magnetic recording head less than the first height at a point of contact with the main pole;
• and
• a hot seed layer coupled to the trailing shield adjacent to the trailing gap, the hot seed layer having a third height extending from the MFS into the magnetic recording head substantially equal to the first height, the hot seed layer comprising:
• one or more hot seed interlayers;
• and
• one or more hot seed layers,
• wherein the one or more hot seed interlayers each individually comprise a non-magnetic material, and
• wherein each of the one or more hot seed layers comprise a high magnetic moment material.

A magnetic recording head, comprising:

• a main pole having a first height extending from a media facing surface (MFS) into the magnetic recording head;
• a trailing shield;
• a trailing gap disposed between the main pole and the trailing shield;
• a spin torque oscillator disposed in contact with the main pole in the trailing gap, the spin torque oscillator having a second height extending from the MFS into the magnetic recording head less than the first height at a point of contact with the main pole;
• a hot seed layer coupled to the trailing shield adjacent to the trailing gap, the hot seed layer having a third height extending from the MFS into the magnetic recording head greater than the second height of the spin torque oscillator, the hot seed layer comprising:
• one or more hot seed interlayers;
• and
• one or more hot seed layers,
• wherein the one or more hot seed interlayers each individually comprise a non-magnetic material, and
• wherein each of the one or more hot seed layers comprise a high magnetic moment material;
• and
• a bump disposed between the hot seed layer and the spin torque oscillator, the bump comprising one or more bump layers comprising a high magnetic moment material and one or more bump interlayers comprising a non-magnetic material.

A magnetic recording head, comprising:

• a main pole having a first height extending from a media facing surface (MFS) into the magnetic recording head;
• a trailing shield;
• a trailing gap disposed between the main pole and the trailing shield;
• a spin torque oscillator disposed in contact with the main pole in the trailing gap, the spin torque oscillator having a second height extending from the MFS into the magnetic recording head less than the first height at a point of contact with the main pole;
• a hot seed layer coupled to the trailing shield adjacent to the trailing gap, the hot seed layer having a third height extending from the MFS into the magnetic recording head greater than the second height of the spin torque oscillator, the hot seed layer comprising:
• one or more hot seed interlayers;
• and
• one or more hot seed layers,
• wherein the one or more hot seed interlayers each individually comprise a non-magnetic material, and
• wherein each of the one or more hot seed layers comprise a high magnetic moment material;
• and
• a notch disposed between the hot seed layer and the spin torque oscillator, the notch comprises one or more notch interlayers and one or more notch layers, wherein the one or more notch layers comprise a different material than the one or more notch interlayers.

A magnetic recording head, comprising:

• a main pole;
• a trailing shield;
• a trailing gap disposed between the main pole and the trailing shield;
• a spin torque oscillator disposed adjacent to the main pole in the trailing gap;
• a notch disposed adjacent to the spin torque oscillator in the trailing gap, the notch comprising a non-magnetic material;
• and
• a bump disposed between the notch and the spin torque oscillator in the trailing gap, the bump comprising one or more bump interlayers alternating with one or more bump layers, wherein the one or more bump interlayers each individually comprises a non-magnetic material, and wherein the one or more bump layers comprise a different material than the one or more bump interlayers, the one or more bump layers being doped with a rare earth metal.