Near-field magneto-optic fiber probe

A novel near-field magnetooptic fiber probe (NF-MOFP) for readback of ultra high density magnetic recording, or high resolution imaging of magnetic domains is described. This NF-MOFP consists of a partially metalized tapered fiber, as used in conventional near-field scanning optical microscopy (NSOM), with the subwavelength sized aperture coated with a reflective magneto-optic (MO) film. This device is then used in a manner similar to conventional NSOM. The properties of the MO Nm deposited on the fiber tip, the NF MOFP's response to applied fields, and images of magnetic domains taken with the device are described.