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Geochemistry Geophysics Geosystems
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Geochemistry Geophysics Geosystems
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Geochemistry Geophysics Geosystems
Article . 2021
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https://dx.doi.org/10.48550/ar...
Article . 2021
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Single Particle Multipole Expansions From Micromagnetic Tomography

Authors: David Cortés‐Ortuño; Karl Fabian; Lennart V. de Groot;

Single Particle Multipole Expansions From Micromagnetic Tomography

Abstract

AbstractMicromagnetic tomography aims at reconstructing large numbers of individual magnetizations of magnetic particles from combining high‐resolution magnetic scanning techniques with micro X‐ray computed tomography (microCT). Previous work demonstrated that dipole moments can be robustly inferred, and mathematical analysis showed that the potential field of each particle is uniquely determined. Here, we describe a mathematical procedure to recover higher orders of the magnetic potential of the individual magnetic particles in terms of their spherical harmonic expansions (SHE). We test this approach on data from scanning superconducting quantum interference device microscopy and microCT of a reference sample. For particles with high signal‐to‐noise ratio of the magnetic scan we demonstrate that SHE up to order n = 3 can be robustly recovered. This additional level of detail restricts the possible internal magnetization structures of the particles and provides valuable rock magnetic information with respect to their stability and reliability as paleomagnetic remanence carriers. Micromagnetic tomography therefore enables a new approach for detailed rock magnetic studies on large ensembles of individual particles.

Country
Netherlands
Keywords

Geophysics. Cosmic physics, multipole, rock magnetism, FOS: Physical sciences, Physics - Geophysics, Geochemistry and Petrology, QE1-996.5, QC801-809, paleomagnetism, Geology, Computational Physics (physics.comp-ph), Geophysics (physics.geo-ph), Condensed Matter - Other Condensed Matter, Geophysics, magnetism, micromagnetic tomography, Physics - Computational Physics, Research Article, Other Condensed Matter (cond-mat.other)

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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
9
Top 10%
Average
Top 10%
Green
gold
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