Study of magnetic properties of magnetic force microscopy probes using micronscale current rings

  title={Study of magnetic properties of magnetic force microscopy probes using micronscale current rings},
  author={L. Kong and S. Chou},
  journal={Journal of Applied Physics},
Metal rings with inner diameters of 1 and 5 μm, fabricated using electron-beam lithography, were used to calibrate magnetic force microscopy (MFM). A MFM tip’s effective magnetic charge, q, and effective magnetic moment along the tip long axis, mz, can be determined by the current flowing in the ring. The magnetic moments in the directions transverse to the tip’s long axis were estimated by a straight current wire. It was found that for a silicon tip coated with 65 nm thick cobalt on the side… Expand

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͑a͒ MFM image of the ring with an inner diameter of 5 ␮m using the tip with 65-nm-thick Co film when the current was 5 mA and the scan height was 90 nm. ͑b͒ MFM signal along the black line in ͑a͒
  • J. Appl. Phys
  • 1997