Probing the local magnetization reversal through magnetoresistance measurement

I. C. Lo; J. C. Wu; Lance Horng; Zung Hang Wei; Mei Fang Lai; C. R. Chang

doi:10.1063/1.1847293

Probing the local magnetization reversal through magnetoresistance measurement

I. C. Lo, J. C. Wu, Lance Horng, Zung Hang Wei, Mei Fang Lai, C. R. Chang

Department of Physics

Research output: Contribution to journal › Article

1 Citation (Scopus)

Abstract

A microstructured permalloy ellipse with six equally spaced nonmagnetic voltage leads has been studied through magnetoresistance measurements and magnetic force microscopy. The aspect ratio and film thickness of the element having three vortices of magnetic configuration were accordingly designed and fabricated using electron-beam lithography through a lift off process. Magnetoresistance curves measured with various pairs of voltage leads have revealed a local magnetic-moment reversal. Two magnetoresistance kinks observed with decreasingincreasing field strength can be attributed to the vortex formationannihilation, which was confirmed by magnetic force microscopy and micromagnetic simulation. The motion of the vortex core driven by the transverse external magnetic field was estimated to be 4.1 nmOe.

Original language	English
Article number	10M102
Journal	Journal of Applied Physics
Volume	97
Issue number	10
DOIs	https://doi.org/10.1063/1.1847293
Publication status	Published - 2005 May 15

All Science Journal Classification (ASJC) codes

Physics and Astronomy(all)

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10.1063/1.1847293

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title = "Probing the local magnetization reversal through magnetoresistance measurement",

abstract = "A microstructured permalloy ellipse with six equally spaced nonmagnetic voltage leads has been studied through magnetoresistance measurements and magnetic force microscopy. The aspect ratio and film thickness of the element having three vortices of magnetic configuration were accordingly designed and fabricated using electron-beam lithography through a lift off process. Magnetoresistance curves measured with various pairs of voltage leads have revealed a local magnetic-moment reversal. Two magnetoresistance kinks observed with decreasingincreasing field strength can be attributed to the vortex formationannihilation, which was confirmed by magnetic force microscopy and micromagnetic simulation. The motion of the vortex core driven by the transverse external magnetic field was estimated to be 4.1 nmOe.",

author = "Lo, {I. C.} and Wu, {J. C.} and Lance Horng and Wei, {Zung Hang} and Lai, {Mei Fang} and Chang, {C. R.}",

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AU - Lo, I. C.

AU - Wu, J. C.

AU - Horng, Lance

AU - Wei, Zung Hang

AU - Lai, Mei Fang

AU - Chang, C. R.

PY - 2005/5/15

Y1 - 2005/5/15

N2 - A microstructured permalloy ellipse with six equally spaced nonmagnetic voltage leads has been studied through magnetoresistance measurements and magnetic force microscopy. The aspect ratio and film thickness of the element having three vortices of magnetic configuration were accordingly designed and fabricated using electron-beam lithography through a lift off process. Magnetoresistance curves measured with various pairs of voltage leads have revealed a local magnetic-moment reversal. Two magnetoresistance kinks observed with decreasingincreasing field strength can be attributed to the vortex formationannihilation, which was confirmed by magnetic force microscopy and micromagnetic simulation. The motion of the vortex core driven by the transverse external magnetic field was estimated to be 4.1 nmOe.

AB - A microstructured permalloy ellipse with six equally spaced nonmagnetic voltage leads has been studied through magnetoresistance measurements and magnetic force microscopy. The aspect ratio and film thickness of the element having three vortices of magnetic configuration were accordingly designed and fabricated using electron-beam lithography through a lift off process. Magnetoresistance curves measured with various pairs of voltage leads have revealed a local magnetic-moment reversal. Two magnetoresistance kinks observed with decreasingincreasing field strength can be attributed to the vortex formationannihilation, which was confirmed by magnetic force microscopy and micromagnetic simulation. The motion of the vortex core driven by the transverse external magnetic field was estimated to be 4.1 nmOe.

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