Moment switching in nanotube magnetic force probes

J.R. Kirtley; Z. Deng; L. Luan; E. Yenilmez; H. Dai; K.A. Moler

doi:10.1088/0957-4484/18/46/465506

Moment switching in nanotube magnetic force probes

J.R. Kirtley, Z. Deng, L. Luan, E. Yenilmez, H. Dai, K.A. Moler

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

10 Citations (Scopus)

Abstract

Magnetic images of high density vertically recorded media using metal-coated carbon nanotube tips exhibit a doubling of the spatial frequency under some conditions (Deng et al 2004 Appl. Phys. Lett. 85 6263). Here we demonstrate that this spatial frequency doubling is due to the switching of the moment direction of the nanotube tip. This results in a signal which is proportional to the absolute value of the signal normally observed in MFM. Our modeling indicates that a significant fraction of the tip volume is involved in the observed switching, and that it should be possible to image high bit densities with nanotube magnetic force sensors.

Original language	Undefined
Pages (from-to)	465506-
Number of pages	7
Journal	Nanotechnology
Volume	18
Issue number	46
DOIs	https://doi.org/10.1088/0957-4484/18/46/465506
Publication status	Published - 2007

Keywords

METIS-246690
IR-74726

Access to Document

10.1088/0957-4484/18/46/465506

Cite this

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T1 - Moment switching in nanotube magnetic force probes

AU - Kirtley, J.R.

AU - Deng, Z.

AU - Luan, L.

AU - Yenilmez, E.

AU - Dai, H.

AU - Moler, K.A.

PY - 2007

Y1 - 2007

N2 - Magnetic images of high density vertically recorded media using metal-coated carbon nanotube tips exhibit a doubling of the spatial frequency under some conditions (Deng et al 2004 Appl. Phys. Lett. 85 6263). Here we demonstrate that this spatial frequency doubling is due to the switching of the moment direction of the nanotube tip. This results in a signal which is proportional to the absolute value of the signal normally observed in MFM. Our modeling indicates that a significant fraction of the tip volume is involved in the observed switching, and that it should be possible to image high bit densities with nanotube magnetic force sensors.

AB - Magnetic images of high density vertically recorded media using metal-coated carbon nanotube tips exhibit a doubling of the spatial frequency under some conditions (Deng et al 2004 Appl. Phys. Lett. 85 6263). Here we demonstrate that this spatial frequency doubling is due to the switching of the moment direction of the nanotube tip. This results in a signal which is proportional to the absolute value of the signal normally observed in MFM. Our modeling indicates that a significant fraction of the tip volume is involved in the observed switching, and that it should be possible to image high bit densities with nanotube magnetic force sensors.

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KW - IR-74726

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