Construction of a Hall effect scanning magnetic microscope using permanent magnets for characterization of rock samples

Araújo, Jefferson F.D.F.; Reis, Andre L. A.; Yokoyama, Elder; Medina, Christian D.; Osorio, G. Fredy G.; Luz-Lima, C.; Falco, Anna De; Lima, Caique D.A.; Silva, João Felipe C.; Sinimbu, Lanna I. M.; Gutierrez, Frederico V.; Pöttker, Walmir E.; Porta, Felipe A. La; Mendoza, Leonardo Alfredo Forero; Tahir,; Rosso, Tommaso Del; Bruno, A. C.

doi:10.1016/j.jmmm.2022.170304

Cited by 4 publications

(5 citation statements)

References 23 publications

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“…Additionally, to test the capabilities of the MSM, a study was conducted on a rock from the Jurassic-Triassic basaltic dike cluster, which was extracted from the western edge of the Parnaíba Basin and identified as Rock Sample, presented in Figure 5d. Regarding the samples, relevant information to be provided is as follows: the double iron sample was prepared using iron oxide powder, identified as Supermagna RW 222 from the company Metal-Chek, assumed to be 96% magnetite; the triple magnetite sample consisted of magnetic microparticles of 99% magnetite; the nickel sample was a nickel wire with 99.9% purity, previously used in other works for calibration [11]. All samples were used for test measurements, with analysis by the Mapper program (Developed for this study).…”

Section: Test Analysismentioning

confidence: 99%

“…For this purpose, a program in MATLAB, identified as Mapper, was developed. The Mapper program has been previously used and described in [11]. The sample to be used in the test case was set up, consisting of a nickel wire with 99.9% purity.…”

Section: Data Treatmentmentioning

confidence: 99%

“…The map in question, which we will identify as the control map, Furthermore, for comparison purposes and better orientation, the RS was also measured using another auxiliary system based on HQ-0811 sensors, as shown in Figure 11 (image in the center). The map in question, which we will identify as the control map, capable of covering the entire area of the rock, was obtained using equipment whose results have already been evaluated by the scientific community, as observed in works [10] and [11].…”

Section: Rock Sample Analysismentioning

confidence: 99%

“…Sensors 2024, 24, x FOR PEER REVIEW 14 of 17 capable of covering the entire area of the rock, was obtained using equipment whose results have already been evaluated by the scientific community, as observed in works [10] and [11]. Within these three large areas, four regions that can be identified at a glance were identified.…”

Section: Rock Sample Analysismentioning

confidence: 99%

“…With the development of microscopy and magnetic sensing [1], a niche within magnetic microscopy emerged, requiring the extraction of diverse magnetic information from extensive samples [2][3][4]. To address this need, the use of spatial actuators aiding in pointto-point data collection gave rise to Magnetic Scanning Microscopy (MSM) [5][6][7][8][9][10][11]. Various operational techniques have been developed for the fabrication of MSM to measure magnetic fields and magnetization across a wide range of temporal and spatial scales [9,[12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

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Multisensor Magnetic Scanning Microscope for Remanent Magnetic Field Measurements

Chaves,

Noris,

Yokoyama

et al. 2024

Sensors

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Magnetic Scanning Microscopy (MSM) emerged with the aim of allowing the visualization of magnetic fields of a sample or material through scanning and proved particularly useful for geology, biomedicine, characterization of magnetic materials, and in the steel industry. In this regard, the reading system of an MSM was modified using a μ-metal magnetic shielding structure to analyze remanent fields. The MSM was adapted to perform readings using two different types of sensors. The sensitive area of the sensors was evaluated, and the HQ-0811 (AKM—Asahi KaseiTM Microdevices) and STJ-010 (Micro MagneticsTM) sensors were chosen, with the HQ-0811 standardized on Printed Circuit Boards (PCBs) to facilitate handling and increase the system’s robustness. In the shielded chamber, two piezoelectric ANC-150 stepper motors (Attocube Systems) were used, arranged planarly, to allow the movement of the analyzed samples under the mounted sensors. To acquire data from the sensors, the Precision Current Source Model 6220 and the Nanovoltmeter Model 2182A (both from Keithley) were used, along with Keithley’s Delta-Mode integrated system. To analyze the system’s effectiveness, three distinct samples were analyzed for calibration, and a MATLAB program was written to analyze the images and extract the material’s magnetization. Additionally, a rock sample from the Parnaíba Basin was mapped to demonstrate the system’s capabilities.

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Section: Test Analysismentioning

confidence: 99%

Section: Data Treatmentmentioning

confidence: 99%

Section: Rock Sample Analysismentioning

confidence: 99%

Section: Rock Sample Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Multisensor Magnetic Scanning Microscope for Remanent Magnetic Field Measurements

Chaves,

Noris,

Yokoyama

et al. 2024

Sensors

Self Cite

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Remanent Magnetic Field Scanning of Coating‐Graded Hybrid Foams

Kunz,

Ibrahim,

Becker

et al. 2024

Adv Eng Mater

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The manufacturing of hybrid materials such as nickel/polyurethane (Ni/PU) hybrid foams and 3D printed hybrid materials with the aid of electrochemical coating of lightweight structures leads to new materials, which can be used as crash absorbers, but also for lightweight design applications. Optimizing the coating quality of the developed hybrid materials necessitates a characterisation on different scales regarding the coating thickness distribution. The ferromagnetic properties of the nickel coating enable a remanent magnetization of the produced hybrid foams and a subsequent measurement of resulting magnetic fields, so that the time‐consumption of a coating distribution determination could be enormously reduced by automating the quantification method. Previous studies have shown, that the local strength of these fields correlate with the deposited mass thus the coating thickness. The here presented automated measurement gives useful information about the homogeneity and the local coating thickness distribution according to an appropriate calibration. In order to optimise the coating quality of the newly developed hybrid materials, improved deposition conditions as well as semi‐automated characterization methods are studied to establish a large‐scale industrial production and a higher applicability of hybrid materials in the near future.This article is protected by copyright. All rights reserved.

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