Directional dependence of magnetization and coercivity in hematite ore experimentally deformed in torsion
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985530%3A_____%2F25%3A00637206" target="_blank" >RIV/67985530:_____/25:00637206 - isvavai.cz</a>
Result on the web
<a href="https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2024JB031033" target="_blank" >https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2024JB031033</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1029/2024JB031033" target="_blank" >10.1029/2024JB031033</a>
Alternative languages
Result language
angličtina
Original language name
Directional dependence of magnetization and coercivity in hematite ore experimentally deformed in torsion
Original language description
Rock-magnetic properties are widely used to resolve the composition, concentration, size, shape, and alignment of iron oxides in rock samples. Although anisotropy of magnetic susceptibility is measured routinely, acquisition of remanent magnetization as well as hysteresis loops are usually measured in one direction only. This may lead to biased interpretation of the results. In our study, observation of strong directional dependence of remanence acquisition curves and hysteresis loops in experimentally deformed samples of hematite ore is reported. While the original undeformed hematite ore sample exhibited magnetic properties practically independent of the direction, the specimens which experienced deformation in torsion showed significant anisotropy. For example, the anisotropy of saturation magnetization reached several tens of percent. Our results suggest that experimental deformation resulted in neoformation of magnetite nanoparticles, as well as shift of the original hematite coercivity spectra toward lower values. These findings have significant impact on the remanent and induced magnetization measurement protocols and interpretation of the data. Anisotropy of these parameters should be checked at least in cases when hematite is assumed to be present in the samples, or the samples underwent creep deformation.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10505 - Geology
Result continuities
Project
<a href="/en/project/GA22-12828S" target="_blank" >GA22-12828S: New perspectives in magnetic fabric interpretation through 3D microstructural analysis, numerical modelling and quantum mechanical description</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Geophysical Research-Solid Earth
ISSN
2169-9313
e-ISSN
2169-9356
Volume of the periodical
130
Issue of the periodical within the volume
7
Country of publishing house
US - UNITED STATES
Number of pages
15
Pages from-to
e2024JB031033
UT code for WoS article
001520852500001
EID of the result in the Scopus database
2-s2.0-105009824986