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MAGNETIC WRITE HEAD CHARACTERIZATION WITH NANO-METER RESOLUTION USING NITROGEN VACANCY COLOR CENTERS

  • US 20160071532A9
  • Filed: 11/04/2014
  • Published: 03/10/2016
  • Est. Priority Date: 02/19/2014
  • Status: Active Grant
First Claim
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1. A method comprising:

  • providing a bias signal to a recording head that includes a write pole to produce a magnetic field from the recording head, wherein a crystal film with nitrogen vacancy centers is positioned in the magnetic field;

    providing an excitation field to the crystal film;

    producing excitation illumination that is incident on the crystal film;

    measuring Optically Detected Spin Resonance (ODMR) by detecting a decrease in a spin dependent photoluminescence in response to the magnetic field, the excitation field and the excitation illumination caused by electron spin resonance (ESR) of the nitrogen vacancy centers; and

    determining a characteristic of the recording head using the ODMR.

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