Spin torque oscillator with multilayer seed for improved performance and reliability

A magnetic recording head, comprising:

• a main pole;
• a trailing shield disposed adjacent to the main pole;
• and
• a spintronic device disposed between the main pole and the trailing shield, the spintronic device comprising:
• a first spacer layer disposed adjacent to the trailing shield;
• a spin torque layer disposed in contact with the first spacer layer;
• a multilayer seed layer disposed in contact with the spin torque layer and the main pole, the multilayer seed layer comprising a high etch rate layer, a heat dissipation layer disposed in contact with the high etch rate layer, and a cooling layer disposed in contact with the heat dissipation layer and the main pole;
• a NiAl layer disposed in contact with the spin torque layer;
• a Ru layer disposed in contact with the NiAl layer;
• and
• a NiFeTa layer disposed in contact with the Ru layer and the high etch rate layer.

A magnetic recording head, comprising:

• a main pole;
• a trailing shield disposed adjacent to the main pole;
• and
• a spintronic device disposed between the main pole and the trailing shield, the spintronic device comprising:
• a spin torque layer;
• a Cu layer disposed under the spin torque layer;
• a Ru layer disposed in contact with the Cu layer;
• a Cr layer disposed in contact with the Ru layer and the main pole;
• a NiAl layer disposed in contact with the spin torque layer;
• a Ru layer disposed in contact with the NiAl layer;
• and
• a NiFeTa layer disposed in contact with the Ru layer and the Cu layer.