Please download the dossier by clicking on the dossier button x
×

Magnetic write head characterization with nano-meter resolution using nitrogen vacancy color centers

  • US 8,885,301 B1
  • Filed: 02/19/2014
  • Issued: 11/11/2014
  • Est. Priority Date: 02/19/2014
  • Status: Active Grant
First Claim
Patent Images

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 excitation illumination caused by electron spin resonance (ESR) of the nitrogen vacancy centers at varying excitation frequencies of the excitation field; and

    determining a characteristic of the recording head using the ODMR detected at the one or more excitation frequencies of the excitation field.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×