Patent ID: 8810946

Claim:
An energy-assisted magnetic recording head comprising: a main pole; and a high-frequency magnetic field generating unit that is arranged adjacently to a trailing side of the main pole; wherein a central line of the high-frequency magnetic field generating unit in a cross-track direction is separated from a central line of the main pole in the cross-track direction when viewed from an air bearing surface; wherein a magnetic field vector from the main pole is substantially perpendicularly incident on a film surface of the high-frequency magnetic field generating unit; wherein a width of the high-frequency magnetic field generating unit in the cross-track direction is 50 nm or less when viewed from the air bearing surface; and wherein a width of the main pole in the cross-track direction at a side on which the main pole is adjacent to the high-frequency magnetic field generating unit is larger than the width of the high-frequency magnetic field generating unit.