Heat assisted magnetic recording with heat profile shaping

A transducer comprising:

• a conductive pin;
• a waveguide for directing electromagnetic radiation onto the pin;
• and
• a groove or depression in an end of the pin to create a rectangular flat top field distribution at a surface of a storage medium positioned adjacent to the end of the pin, leading to a flat top thermal profile within the storage medium.

A transducer comprising:

• first and second conductive pins;
• a waveguide for directing electromagnetic radiation onto the first and second conductive pins;
• and
• wherein the pins are configured to create a rectangular flat top field distribution at a surface of a storage medium positioned adjacent to ends of the pins, leading to a flat top thermal profile within the storage medium.

A recording head comprising:

• a magnetic write pole;
• a waveguide positioned adjacent to the magnetic write pole for directing electromagnetic radiation onto a conductive pin;
• and
• either first and second spaced protrusions on an end of the pin, or a groove or depression in the end of the pin configured to create a rectangular flat top field distribution at a surface of a storage medium positioned adjacent to the end of the pin, leading to a flat top thermal profile within the storage medium.

A disc drive comprising:

• a motor for rotating a storage medium;
• and
• an arm for positioning a recording head adjacent to a surface of the storage medium;
• wherein the recording head comprises a magnetic write pole, a waveguide positioned adjacent to the magnetic write pole for directing electromagnetic radiation onto a conductive pin;
• and
• either first and second spaced protrusions on an end of the pin, or a groove or depression in the end of the in configured to create a rectangular flat top field distribution at a surface of a storage medium positioned adjacent to the end of the pin, leading to a flat top thermal profile within the storage medium.

A method of heating a portion of a storage medium, the method comprising:

• placing a conductive pin adjacent to a surface of the storage medium, wherein the pin includes either first and second spaced protrusions on an end of the pin, or a groove or depression in the end of the pin;
• directing electromagnetic radiation onto the pin;
• and
• using the electromagnetic radiation to create a rectangular flat top field distribution at a surface of a storage medium positioned adjacent to the end of the pin, leading to a flat top thermal profile within the storage medium.