Controlling head-media spacing using a write coil
While a heat-assisted, magnetic recording media is not being written to, heat applied from a write head to the recording media to facilitate writing to the recording media is removed. Power is applied to a write coil of the write head to control spacing between the write head and the recording media when the recording media is not being written to.
1. A method comprising:
removing, while a heat-assisted, magnetic recording media is not being written to, heat applied from a write head to the recording media via a near-field transducer, the heat facilitating writing to the recording media; and
applying power to a write coil of the write head to control a spacing between the write head and the recording media when the recording media is not being written to.
2. The method of claim 1 , wherein applying the power to the write coil causes a heat-induced protrusion of the write head that varies the spacing between the write head and the recording media.
3. The method of claim 1 , wherein the application of the power to the write coil is employed in place of a heater dedicated to adjusting the spacing for a transducer of the write head.
4. The method of claim 1 , further comprising:
applying the heat to the recording media via the write head when the recording media is being written to; and
applying the power to the write coil to both record data and to control the spacing between the write head and the recording media when the recording media is being written to.
5. The method of claim 1 , further comprising:
applying the heat to the recording media via the write head when the recording media is being written to; and
applying power to a dedicated heater to control spacing between the write head and the recording media when the recording media is being written to.
6. The method of claim 1 , wherein the application of power to the write coil when the recording media is not being written to applies a magnetic field to the recording media, and wherein the magnetic field does not write data to the recording media due to a removal of the heat.
7. A write head, comprising:
a device configured to apply heat to a heat-assisted magnetic recording media via a near-field transducer to facilitate writing to the recording media;
a write coil configured to apply a magnetic field to the magnetic media in response to application of power to the write coil, wherein the write coil is configured to control, at least when the heat is removed from the recording media, a spacing between the write head and the magnetic media in response to the application of power to the write coil.
8. The write head of claim 7 , further comprising an optical device configured to apply energy to the near-field transducer.
9. The write head of claim 7 , wherein the application of power to the write coil causes a heat-induced protrusion of the write head that varies the spacing between the write head and the recording media.
10. The write head of claim 7 , wherein the application of the power to the write coil is employed in place of a heater dedicated to controller the spacing for a transducer of the write head.
11. The write head of claim 7 , wherein the write coil is further configured to both record data to the magnetic media and to control the spacing between the write head and the recording media during writing to the recording media.
12. The write head of claim 7 , wherein the magnetic field does not write data to the recording media when the heat is removed from the recording media.
13. An apparatus, comprising:
a write head comprising a write coil;
an optical device configured to apply heat to a heat-assisted magnetic recording media via the write head during writing; and
a controller coupled to the write head and the device, the controller configured to:
remove the heat from the recording media when the recording media is not being written to; and
apply power to the write coil, wherein the write coil is configured to control, at least when the heat is removed from the recording media, a spacing between the write head and the magnetic media in response to the application of power to the write coil.
14. The apparatus of claim 13 , wherein the application of power to the write coil causes a heat-induced protrusion of the write head that varies the spacing between the write head and the recording media.
15. The apparatus of claim 13 , wherein the application of the power to the write coil is employed in place of a heater dedicated to control the spacing of a transducer of the write head.
16. The apparatus of claim 13 , wherein the write head comprises a dedicated heater, and wherein the controller is further configured to:
apply the heat to the recording media via the write head to when the recording media is being written to; and
apply power to the dedicated heater to control the spacing between the write head and the recording media when the recording media is being written to.
17. The apparatus of claim 13 , wherein the application of the power to the write coil when the recording media is not being written to applies a magnetic field to the magnetic media, wherein the magnetic field does not write data to the recording media when the heat is removed.