Publication detail

Round robin comparison on quantitative nanometer scale magnetic field measurements by magnetic force microscopy

HU, X. PUTTOCK, R. KAZAKOVA, O. ULVR, M. KLAPETEK, P. NEČAS, D. NEU, V.

Original Title

Round robin comparison on quantitative nanometer scale magnetic field measurements by magnetic force microscopy

Type

journal article in Web of Science

Language

English

Original Abstract

Magnetic force microscopy (MFM) can be considered as a standard tool for nano-scale investigation of magnetic domain structures by probing the local stray magnetic field landscape of the measured sample. However, this generally provides only qualitative data. To quantify the stray magnetic fields, the MFM system must be calibrated. To that end, a transfer function (TF) approach was proposed, that, unlike point probe models, fully considers the finite extent of the MFM tip. However, albeit being comprehensive, the TF approach is not yet well established, mainly due to the ambiguities concerning the input parameters and the measurement procedure. Additionally, the calibration process represents an ill-posed problem which requires a regularization that introduces further parameters. In this paper we propose a guideline for quantitative stray field measurements by standard MFM tools in ambient conditions. All steps of the measurement and calibration procedure are detailed, including reference sample and sample under test (SUT) measurements and the data analysis. The suitability of the reference sample used in the present work for calibrated measurements on a sub-micron scale is discussed. A specific regularization approach based on a Pseudo-Wiener Filter is applied and combined with criteria for the numerical determination of a unique regularization parameter. To demonstrate the robustness of such a defined approach, a round robin comparison of magnetic field measurements was conducted by four laboratories. The guideline, the reference sample and the results of the round robin are discussed.

Keywords

Comparison; Quantitative magnetic force microscopy; Magnetic probe calibration; Reference sample; Stray magnetic field

Authors

HU, X.; PUTTOCK, R.; KAZAKOVA, O.; ULVR, M.; KLAPETEK, P.; NEČAS, D.; NEU, V.

Released

1. 10. 2020

Publisher

ELSEVIER

Location

AMSTERDAM

ISBN

1873-4766

Periodical

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

Year of study

511

Number

1

State

Kingdom of the Netherlands

Pages from

166947-1

Pages to

166947-11

Pages count

11

URL