Magnetic Force Microscopy: Comparison and Validation of Different Magnetic Force Microscopy Calibration Schemes (Small 11/2020)

Corte‐León, Héctor; Neu, V.; Manzin, A.; Barton, Craig; Tang, Yuanjun; Gerken, Manuela; Klapetek, Petr; Schumacher, H. W.; Kazakova, Olga

doi:10.1002/smll.202070058

Cited by 2 publications

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For accurate characterization of an MNP's magnetism from recorded MFM phase images, it is therefore necessary to first quantitatively determine the magnetic parameters of the tip. Toward this purpose, various MFM tip calibration methods [27] have been proposed, for example, using nano coils, Hall effect [28], tip transfer function [29], quantum calibration [30], etc. However, these calibration methods are only suitable when the size and magnetic orientation of the samples are substantially comparable to those of the reference materials.…”

Section: Introductionmentioning

confidence: 99%

Accurate determination of MFM tip’s magnetic parameters on nanoparticles by decoupling the influence of electrostatic force

Zhang²,

Wang³

et al. 2022

Nanotechnology

View full text Add to dashboard Cite

Magnetic force microscopy (MFM) has become one of the most important instruments for characterizing magnetic materials with nanoscale spatial resolution. When analyzing magnetic particles by MFM, calibration of the magnetic tips using reference magnetic nanoparticles is a prerequisite due to similar orientation and dimension of the yielded magnetic fields. However, in such a calibration process, errors caused by extra electrostatic interactions will significantly affect the output results. In this work, we evaluate the magnetic moment and dipole radius of the MFM tip on Fe3O4 nanoparticles by considering the associated electrostatic force. The coupling of electrostatic contribution on the measured MFM phase is eliminated by combining MFM and Kelvin probe force microscopy together with theoretical modeling. Numerical simulations and experiments on nickel nanoparticles demonstrate the effectiveness of decoupling. Results show that the calibrated MFM tip can enable a more accurate analysis of micro-and-nano magnetism. In addition, a fast and easy calibration method by using bimodal MFM is discussed, in which the acquisition of multiple phase shifts at different lift heights is not required.

show abstract

Section: Introductionmentioning

confidence: 99%

Accurate determination of MFM tip’s magnetic parameters on nanoparticles by decoupling the influence of electrostatic force

Zhang²,

Wang³

et al. 2022

Nanotechnology

View full text Add to dashboard Cite

show abstract

On the Localization of Persistent Currents Due to Trapped Magnetic Flux at the Stacking Faults of Graphite at Room Temperature

Ariskina¹,

Stiller²,

Precker

et al. 2022

Materials

View full text Add to dashboard Cite

Granular superconductivity at high temperatures in graphite can emerge at certain two-dimensional (2D) stacking faults (SFs) between regions with twisted (around the c-axis) or untwisted crystalline regions with Bernal (ABA…) and/or rhombohedral (ABCABCA…) stacking order. One way to observe experimentally such 2D superconductivity is to measure the frozen magnetic flux produced by a permanent current loop that remains after removing an external magnetic field applied normal to the SFs. Magnetic force microscopy was used to localize and characterize such a permanent current path found in one natural graphite sample out of ∼50 measured graphite samples of different origins. The position of the current path drifts with time and roughly follows a logarithmic time dependence similar to the one for flux creep in type II superconductors. We demonstrate that a ≃10 nm deep scratch on the sample surface at the position of the current path causes a change in its location. A further scratch was enough to irreversibly destroy the remanent state of the sample at room temperature. Our studies clarify some of the reasons for the difficulties of finding a trapped flux in a remanent state at room temperature in graphite samples with SFs.

show abstract

Magnetic Force Microscopy: Comparison and Validation of Different Magnetic Force Microscopy Calibration Schemes (Small 11/2020)

Cited by 2 publications

References 0 publications

Accurate determination of MFM tip’s magnetic parameters on nanoparticles by decoupling the influence of electrostatic force

Accurate determination of MFM tip’s magnetic parameters on nanoparticles by decoupling the influence of electrostatic force

On the Localization of Persistent Currents Due to Trapped Magnetic Flux at the Stacking Faults of Graphite at Room Temperature

Contact Info

Product

Resources

About