Three terminal magnetic recording head

A magnetic recording device, comprising:

• a main pole;
• a coil around the main pole;
• a trailing shield;
• a trailing gap between the main pole and the trailing shield, the trailing gap comprising a non-magnetic conductive material;
• a leading shield;
• a leading gap between the main pole and the leading shield, the leading gap comprising a non-magnetic conductive material;
• the main pole coupled to a first terminal, the trailing shield coupled to a second terminal, and the leading shield coupled to a third terminal;
• a first current path formed between the second terminal and the third terminal through the trailing shield, the trailing gap, the main pole, the leading gap, and leading shield and a second current path formed between the first terminal and the third terminal through the main pole, the leading gap, and the leading shield;
• and
• a power source providing a first bias current through the second terminal and the third terminal of the first current path and providing a second bias current through the first terminal and the third terminal of the second current path.

A magnetic recording device, comprising:

• a main pole;
• a coil around the main pole;
• a trailing shield;
• a spin torque oscillator device between a first surface of the main pole and the trailing shield;
• a leading shield;
• a leading gap between the main pole and the leading shield, the leading gap comprising a conductive non-magnetic material disposed between a second surface of the main pole opposite the first surface and the leading shield;
• and
• the main pole coupled to a first terminal, the trailing shield coupled to a second terminal, and the leading shield coupled to a third terminal.

A magnetic recording device, comprising:

• a main pole;
• a coil around the main pole;
• a trailing shield;
• a spin torque oscillator device between the main pole and the trailing shield;
• a leading shield;
• a leading gap between the main pole and the leading shield, the leading gap comprising a conductive non-magnetic material;
• the main pole coupled to a first terminal, the trailing shield coupled to a second terminal, and the leading shield coupled to a third terminal;
• a first current path formed between the second terminal and the third terminal through the trailing shield, the trailing gap, the main pole, the leading gap, and leading shield and a second current path formed between the first terminal and the third terminal through the main pole, the leading gap, and the leading shield;
• and
• a power source providing a first bias current through the second terminal and the third terminal of the first current path and providing a second bias current through the first terminal and the third terminal of the second current path.

A method of writing data to a magnetic medium, comprising:

• providing a write current to a coil of a main pole;
• providing a first current path through a trailing gap and providing a second current path through a leading gap;
• and
• providing a first bias current though the first current path and providing a second bias current through the second current path, wherein the first bias current and the second bias current are provided as different waveforms.

A magnetic recording device, comprising:

• a main pole providing a main writing magnetic field;
• a first assisting writing magnetic field means;
• a second assisting writing magnetic field means;
• and
• an electric connection means providing a first bias current provided to the first assisting writing magnetic field means and provided to the second assisting writing magnetic field means, and a second bias current provided to the second assisting writing magnetic field means.