The vortex state in geologic materials: A micromagnetic perspective

I Lascu, JF Einsle, MR Ball… - Journal of Geophysical …, 2018 - Wiley Online Library
A wide variety of Earth and planetary materials are very good recorders of paleomagnetic
information. However, most magnetic grains in these materials are not in the stable single …

Resolving the origin of pseudo‐single domain magnetic behavior

AP Roberts, TP Almeida, NS Church… - Journal of …, 2017 - Wiley Online Library
The term “pseudo‐single domain”(PSD) has been used to describe the transitional state in
rock magnetism that spans the particle size range between the single domain (SD) and …

Direct visualization of the thermomagnetic behavior of pseudo–single-domain magnetite particles

TP Almeida, AR Muxworthy, A Kovács, W Williams… - Science …, 2016 - science.org
The study of the paleomagnetic signal recorded by rocks allows scientists to understand
Earth's past magnetic field and the formation of the geodynamo. The magnetic recording …

Micromagnetic modeling of first-order reversal curve (FORC) diagrams for single-domain and pseudo-single-domain magnetite

C Carvallo, AR Muxworthy, DJ Dunlop… - Earth and Planetary …, 2003 - Elsevier
First-order reversal curve (FORC) diagrams have been experimentally shown to be a better
way of discriminating domain states in a sample compared to the straightforward use of …

Direct observation of the thermal demagnetization of magnetic vortex structures in nonideal magnetite recorders

TP Almeida, AR Muxworthy, A Kovács… - Geophysical …, 2016 - Wiley Online Library
The thermal demagnetization of pseudo‐single‐domain (PSD) magnetite (Fe3O4) particles,
which govern the magnetic signal in many igneous rocks, is examined using off‐axis …

Unlocking information about fine magnetic particle assemblages from first-order reversal curve diagrams: Recent advances

AP Roberts, D Heslop, X Zhao, H Oda, R Egli… - Earth-Science …, 2022 - Elsevier
The magnetic domain state of a material determines its magnetic recording capability and
magnetic properties. Constraining the domain state of magnetic components within …

From nano to micro: Evolution of magnetic domain structures in multidomain magnetite

L Nagy, W Williams, L Tauxe… - Geochemistry …, 2019 - Wiley Online Library
Reliability of magnetic recordings of the ancient magnetic field is strongly dependent on the
magnetic mineralogy of natural samples. Theoretical estimates of long‐term stability of …

Multi-scale three-dimensional characterization of iron particles in dusty olivine: Implications for paleomagnetism of chondritic meteorites

JF Einsle, RJ Harrison, T Kasama… - American …, 2016 - pubs.geoscienceworld.org
Dusty olivine (olivine containing multiple sub-micrometer inclusions of metallic iron) in
chondritic meteorites is considered an ideal carrier of paleomagnetic remanence, capable of …

Observing thermomagnetic stability of nonideal magnetite particles: Good paleomagnetic recorders?

TP Almeida, T Kasama, AR Muxworthy… - Geophysical …, 2014 - Wiley Online Library
The thermomagnetic behavior of remanence‐induced magnetite (Fe3O4) particles in the
pseudo‐single‐domain (PSD) size range (~ 0.1–10 µm), which dominate the magnetic …

Magnetic vortex effects on first-order reversal curve (FORC) diagrams for greigite dispersions

MA Valdez-Grijalva, AR Muxworthy, W Williams… - Earth and Planetary …, 2018 - Elsevier
First-order reversal curve (FORC) diagrams are used increasingly in geophysics for
magnetic domain state identification. The domain state of a magnetic particle is highly …