Patent ID: 8811127

Claim:
A magnetic head comprising: a reading part that is prepared upper than a substrate in a lamination direction and has a reading element that performs reading of information recorded in a magnetic recording medium; a recording part that is prepared upper than the substrate in the lamination direction and performs magnetic recording to the magnetic recording medium; a recording part expansion heater that is positioned in a vicinity of the recording part; a reading part expansion heater that is positioned in a vicinity of the reading part; and a thermal expansion promoting layer that is prepared at a position closer to the reading part than to the recording part and extends to an air bearing surface that opposes the magnetic recording medium, wherein the recording part comprises: a waveguide that propagates incident light toward the air bearing surface; a main magnetic pole of which one end part is positioned on the air bearing surface; and a plasmon generator that is positioned between the waveguide and the main magnetic pole, that is prepared along the waveguide in a manner opposing the waveguide, and of which one end part is positioned on the air bearing surface, and the recording part is a thermally-assisted magnetic recording part that performs magnetic recording to the magnetic recording medium while heating the magnetic recording medium by irradiating the magnetic recording medium with light.