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

Linshu Kong; Stephen Y. Chou

doi:10.1063/1.364499

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

Linshu Kong, Stephen Y. Chou

Research output: Contribution to journal › Article › peer-review

32 Scopus citations

Abstract

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, m_z, 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, q = 2.8 × 10^-6 emu/cm, m_z = 3.8 × 10^-9 emu, and m_x = m_y = 10^-13 emu, which are negligible compared with m_z. Furthermore, the tip's sensitivity to the second derivative of the magnetic field was found to be about 0.1 Oe/nm².

Original language	English (US)
Pages (from-to)	5026-5028
Number of pages	3
Journal	Journal of Applied Physics
Volume	81
Issue number	8 PART 2B
DOIs	https://doi.org/10.1063/1.364499
State	Published - Apr 15 1997
Externally published	Yes

All Science Journal Classification (ASJC) codes

General Physics and Astronomy

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10.1063/1.364499

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title = "Study of magnetic properties of magnetic force microscopy probes using micronscale current rings",

abstract = "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, q = 2.8 × 10-6 emu/cm, mz = 3.8 × 10-9 emu, and mx = my = 10-13 emu, which are negligible compared with mz. Furthermore, the tip's sensitivity to the second derivative of the magnetic field was found to be about 0.1 Oe/nm2.",

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T1 - Study of magnetic properties of magnetic force microscopy probes using micronscale current rings

AU - Kong, Linshu

AU - Chou, Stephen Y.

PY - 1997/4/15

Y1 - 1997/4/15

N2 - 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, q = 2.8 × 10-6 emu/cm, mz = 3.8 × 10-9 emu, and mx = my = 10-13 emu, which are negligible compared with mz. Furthermore, the tip's sensitivity to the second derivative of the magnetic field was found to be about 0.1 Oe/nm2.

AB - 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, q = 2.8 × 10-6 emu/cm, mz = 3.8 × 10-9 emu, and mx = my = 10-13 emu, which are negligible compared with mz. Furthermore, the tip's sensitivity to the second derivative of the magnetic field was found to be about 0.1 Oe/nm2.

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

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