Measuring Iron Oxide Composites with a Custom-Made Scanning Magnetic Microscope
We improved a scanning magnetic microscope built previously by adding a new detection system and the capability of mapping samples applying magnetic fields from −500 mT to +500 mT. The mechanical structure was also enhanced to decrease vibrations of the system in the earth’s magnetic field. The micr...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-04-01
|
| Series: | Sensors |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1424-8220/25/8/2594 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850154961069932544 |
|---|---|
| author | Christian D. Medina Leonardo A. F. Mendoza Cleânio Luz-Lima Antonio C. Bruno Jefferson F. D. F. Araujo |
| author_facet | Christian D. Medina Leonardo A. F. Mendoza Cleânio Luz-Lima Antonio C. Bruno Jefferson F. D. F. Araujo |
| author_sort | Christian D. Medina |
| collection | DOAJ |
| description | We improved a scanning magnetic microscope built previously by adding a new detection system and the capability of mapping samples applying magnetic fields from −500 mT to +500 mT. The mechanical structure was also enhanced to decrease vibrations of the system in the earth’s magnetic field. The microscope is based on a differential arrangement of two Hall effect elements. The overall system presented a sensitivity of about 850 <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>n</mi><msub><mi>T</mi><mrow><mi>r</mi><mi>m</mi><mi>s</mi></mrow></msub><mo>√</mo><mi>H</mi><mi>z</mi></mrow></semantics></math></inline-formula>, and it was calibrated using a 99% pure nickel sphere. The system achieved a magnetic moment sensitivity of the order of 10 nAm<sup>2</sup>. All equipment used for operating the magnetic microscope was controlled by using the LabVIEW<sup>®</sup> platform. We also fabricated samples with controlled properties using iron oxide microparticles and epoxy resin with various densities. We obtained the magnetization curves of the composites using the assembled microscope and compared them with the iron oxide powder. |
| format | Article |
| id | doaj-art-4d8c35f385ec420eace83e24a4ef2c4b |
| institution | OA Journals |
| issn | 1424-8220 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj-art-4d8c35f385ec420eace83e24a4ef2c4b2025-08-20T02:25:07ZengMDPI AGSensors1424-82202025-04-01258259410.3390/s25082594Measuring Iron Oxide Composites with a Custom-Made Scanning Magnetic MicroscopeChristian D. Medina0Leonardo A. F. Mendoza1Cleânio Luz-Lima2Antonio C. Bruno3Jefferson F. D. F. Araujo4Department of Physics, Pontificia Universidade Católica do Rio de Janeiro, Rio de Janeiro 22451-900, RJ, BrazilDepartment of Electrical Engineering, State University of Rio de Janeiro—UERJ, Rio de Janeiro 20550-900, RJ, BrazilPhysics Department, Federal University of Piauí, Teresina 64049-550, PI, BrazilDepartment of Physics, Pontificia Universidade Católica do Rio de Janeiro, Rio de Janeiro 22451-900, RJ, BrazilDepartment of Physics, Pontificia Universidade Católica do Rio de Janeiro, Rio de Janeiro 22451-900, RJ, BrazilWe improved a scanning magnetic microscope built previously by adding a new detection system and the capability of mapping samples applying magnetic fields from −500 mT to +500 mT. The mechanical structure was also enhanced to decrease vibrations of the system in the earth’s magnetic field. The microscope is based on a differential arrangement of two Hall effect elements. The overall system presented a sensitivity of about 850 <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>n</mi><msub><mi>T</mi><mrow><mi>r</mi><mi>m</mi><mi>s</mi></mrow></msub><mo>√</mo><mi>H</mi><mi>z</mi></mrow></semantics></math></inline-formula>, and it was calibrated using a 99% pure nickel sphere. The system achieved a magnetic moment sensitivity of the order of 10 nAm<sup>2</sup>. All equipment used for operating the magnetic microscope was controlled by using the LabVIEW<sup>®</sup> platform. We also fabricated samples with controlled properties using iron oxide microparticles and epoxy resin with various densities. We obtained the magnetization curves of the composites using the assembled microscope and compared them with the iron oxide powder.https://www.mdpi.com/1424-8220/25/8/2594scanning magnetic microscopeHall sensormagnetic measurements |
| spellingShingle | Christian D. Medina Leonardo A. F. Mendoza Cleânio Luz-Lima Antonio C. Bruno Jefferson F. D. F. Araujo Measuring Iron Oxide Composites with a Custom-Made Scanning Magnetic Microscope Sensors scanning magnetic microscope Hall sensor magnetic measurements |
| title | Measuring Iron Oxide Composites with a Custom-Made Scanning Magnetic Microscope |
| title_full | Measuring Iron Oxide Composites with a Custom-Made Scanning Magnetic Microscope |
| title_fullStr | Measuring Iron Oxide Composites with a Custom-Made Scanning Magnetic Microscope |
| title_full_unstemmed | Measuring Iron Oxide Composites with a Custom-Made Scanning Magnetic Microscope |
| title_short | Measuring Iron Oxide Composites with a Custom-Made Scanning Magnetic Microscope |
| title_sort | measuring iron oxide composites with a custom made scanning magnetic microscope |
| topic | scanning magnetic microscope Hall sensor magnetic measurements |
| url | https://www.mdpi.com/1424-8220/25/8/2594 |
| work_keys_str_mv | AT christiandmedina measuringironoxidecompositeswithacustommadescanningmagneticmicroscope AT leonardoafmendoza measuringironoxidecompositeswithacustommadescanningmagneticmicroscope AT cleanioluzlima measuringironoxidecompositeswithacustommadescanningmagneticmicroscope AT antoniocbruno measuringironoxidecompositeswithacustommadescanningmagneticmicroscope AT jeffersonfdfaraujo measuringironoxidecompositeswithacustommadescanningmagneticmicroscope |