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

被引：5

作者：

Araujo, Jefferson F. D. F. ^{[1
]}

Reis, Andre L. A. ^{[2
]}

Yokoyama, Elder ^{[3
]}

Medina, Christian D. ^{[1
]}

Osorio, G. Fredy G. ^{[1
]}

Luz-Lima, Cleanio ^{[4
]}

De Falco, Anna ^{[5
]}

Lima, Caique D. A. ^{[1
]}

Silva, Joao Felipe C. ^{[1
]}

Sinimbu, Lanna I. M. ^{[1
]}

Gutierrez, Frederico, V ^{[1
]}

Pottker, Walmir E. ^{[6
]}

La Porta, Felipe A. ^{[6
]}

Mendoza, Leonardo A. F. ^{[7
]}

Tahir ^{[1
]}

Del Rosso, Tommaso ^{[1
]}

Bruno, Antonio C. ^{[1
]}

机构：

[1] Pontif Catholic Univ Rio De Janeiro, Dept Phys, BR-22451900 Rio De Janeiro, Brazil

[2] Rio Janeiro State Univ, Fac Geol, Rio De Janeiro, Brazil

[3] Univ Brasilia, Inst Geosci, BR-70910900 Brasilia, Brazil

[4] Univ Fed Piaui, Dept Phys, BR-64049550 Teresina, PI, Brazil

[5] Pontif Catholic Univ Rio De Janeiro, Dept Chem, BR-22451900 Rio De Janeiro, RJ, Brazil

[6] UTFPR, Fed Technol Univ Parana, Ave Pioneiros 3131, BR-86036370 Londrina, PR, Brazil

[7] State Univ Rio De Janeiro UERJ, Dept Elect Engn, BR-20550900 Rio De Janeiro, RJ, Brazil

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2023年 / 569卷

关键词：

Scanning magnetic microscope; Hall sensor; Rock magnetism; Paleomagnetism; LUMINESCENCE;

D O I：

10.1016/j.jmmm.2022.170304

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this paper, a magnetic microscope using Hall effect sensors was built on a gradiometric configuration with spatial resolution equal to 620 mu m and a magnetic moment sensitivity estimated in 80 nAm2. It can apply magnetic fields to samples employing a small permanent magnet. The applied field intensity can be tuned by adjusting the magnet distance to the sample. At a distance of 500 mu m from the surface of sample, the spatial field uniformity reaches 99.7 % in a 5.0 mm radius. The microscope was automated using the LabVIEW (R) platform, making it versatile equipment accessible to laboratories on a low budget. Its performance was tested on a basaltic sample from the Jurassic-Triassic magmatism occurring at the Parnaiba Basin, Brazil.

引用

页数：10

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