Micromagnetic model for magnetic force microscopy tips

Tomlinson, S.L.; Farley, A. N.

doi:10.1063/1.365565

Cited by 22 publications

(7 citation statements)

References 13 publications

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“…[1][2][3] Since the original MFM study by Martin and Wickramasinghe in 1987, 2 a number of experimental and theoretical works have been reported based on MFM, including magnetic writing recording media, [4][5][6][7] magnetic domain wall structures, 1,[8][9][10][11][12] MFM image quantification, and simulations and modeling. [13][14][15][16] For biological application, MFM has also been used in studying the magnetic properties of biomolecules, 17,18 biogenic nanoparticles, 19 and magnetotactic bacterium. 18 Recently, the application of magnetic nanoparticles in cellular biology and medicine has gained much interest because of their controllable small size as drug carriers and easy manipulation by external magnetic field.…”

Section: Introductionmentioning

confidence: 99%

Magnetic force microscopy of iron oxide nanoparticles and their cellular uptake

Zhang

Yang

Ozkan

et al. 2009

Biotechnology Progress

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Magnetic force microscopy has the capability to detect magnetic domains from a close distance, which can provide the magnetic force gradient image of the scanned samples and also simultaneously obtain atomic force microscope (AFM) topography image as well as AFM phase image. In this work, we demonstrate the use of magnetic force microscopy together with AFM topography and phase imaging for the characterization of magnetic iron oxide nanoparticles and their cellular uptake behavior with the MCF7 carcinoma breast epithelial cells. This method can provide useful information such as the magnetic responses of nanoparticles, nanoparticle spatial localization, cell morphology, and cell surface domains at the same time for better understanding magnetic nanoparticle-cell interaction. It would help to design magnetic-related new imaging, diagnostic and therapeutic methods.

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Section: Introductionmentioning

confidence: 99%

Magnetic force microscopy of iron oxide nanoparticles and their cellular uptake

Zhang

Yang

Ozkan

et al. 2009

Biotechnology Progress

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“…It is considered that an external magnetic field created by the tip does not influence the sample magnetization, and vice versa. The magnetization structure of the tip and the sample depends on the geometry, magnetic properties and magnetic prehistory of each object and can be calculated in terms of the micromagnetic theory [8,9]. To calculate the gradient, magnetic capacities of the tip and the sample are divided into physically small areas.…”

Section: Introductionmentioning

confidence: 99%

The Computer Analysis of MFM Images of Separate Ferromagnetic Nanoparticles

Ovchinnikov¹,

Бухараев²

2003

AIP Conference Proceedings

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A computer analysis of MFM images of separate ferromagnetic single-domain nanoparticles placed on a nonmagnetic substrate was carried out. The shape of an MFM tip and the trajectory of its movement were taken into account. The aureoles were found in the magnetic contrast of MFM images simulated for the lifting mode. The conditions and the reasons of the appearance of these aureoles were discussed.

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“…Micromagnetic calculations on pyramidal MFM tips have shown how the magnetization reversal of the tip is affected when single but different planes of the tip are coated with a ferromagnetic thin film. 16 The calculations, however, where done using the material parameters of permalloy, which is only rarely used in experimental investigations. Heydon et al 17 have used a method called resonant torque magnetometry in order to measure hysteresis loops on tips which were coated with a Co/Pt film.…”

Section: Introductionmentioning

confidence: 99%

Magnetization reversal and coercivity of magnetic-force microscopy tips

Carl¹,

Lohau²,

Kirsch³

et al. 2001

Journal of Applied Physics

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An experimental technique is presented that allows determining the magnetization reversal and coercivity of magnetic-force microscopy (MFM) tips. An Ω-shaped current carrying gold ring with a radius of 2400 nm fabricated by electron-beam lithography and a lift-off technique is charged with a constant current in order to produce a magnetic stray field in the z direction that is detected by MFM. While an oscillating MFM tip is continuously raster scanned across the center of the current ring, an external magnetic field is applied in the z direction and increased in magnitude in order to reverse the tip magnetization during imaging. Thus, the corresponding changes in the measured image contrast exclusively describe the magnetization reversal and coercivity of the particular part of the tip that is used for imaging. We have investigated commercially available thin-film tips and we find that the hysteresis loops measured with MFM may be significantly different as compared to hysteresis loops measured by means of superconducting quantum interference magnetometry on the respective magnetic tip coatings of the same tip.

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Micromagnetic model for magnetic force microscopy tips

Abstract: Articles you may be interested inDot-by-dot analysis of magnetization reversal in perpendicular patterned CoCrPt medium by using magnetic force microscopy

Cited by 22 publications

References 13 publications

Magnetic force microscopy of iron oxide nanoparticles and their cellular uptake

Magnetic force microscopy of iron oxide nanoparticles and their cellular uptake

The Computer Analysis of MFM Images of Separate Ferromagnetic Nanoparticles

Magnetization reversal and coercivity of magnetic-force microscopy tips

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