Zobrazeno 1 - 7
of 7
pro vyhledávání: '"Miguel A. Valdez‐Grijalva"'
Autor:
Lesleis Nagy, Roberto Moreno, Adrian R. Muxworthy, Wyn Williams, Greig A. Paterson, Lisa Tauxe, Miguel A. Valdez‐Grijalva
Publikováno v:
Geochemistry, Geophysics, Geosystems, Vol 25, Iss 7, Pp n/a-n/a (2024)
Abstract Micromagnetic modeling allows the systematic study of the effects of particle size and shape on the first‐order reversal curve (FORC) magnetic hysteresis response for magnetite particles in the single‐domain (SD) and pseudo‐single doma
Externí odkaz:
https://doaj.org/article/dc8a30741dea4ab5b5e82c20e8be3a23
Autor:
Jay Shah, Wyn Williams, Trevor P. Almeida, Lesleis Nagy, Adrian R. Muxworthy, András Kovács, Miguel A. Valdez-Grijalva, Karl Fabian, Sara S. Russell, Matthew J. Genge, Rafal E. Dunin-Borkowski
Publikováno v:
Nature Communications, Vol 9, Iss 1, Pp 1-6 (2018)
Magnetic fields are thought to have been influential in the formation of our solar system. Here, the authors observe thermomagnetically stable, non-uniformly magnetized kamacite grains within chondritic meteorites, and calculate the grains to retain
Externí odkaz:
https://doaj.org/article/0d04c007910846fd96c74446bb65d1e1
Autor:
Jiangang Ku, Miguel A. Valdez-Grijalva, Rongdong Deng, Weiran Zuo, Qidi Chen, Hua Lin, Adrian R. Muxworthy
Publikováno v:
Geosciences, Vol 9, Iss 3, p 133 (2019)
We determine the role of particle shape in the type of magnetic extraction processes used in mining. We use a micromagnetic finite element method (FEM) to analyze the effect of external magnetic fields on the magnetic structures of sub-micron magneti
Externí odkaz:
https://doaj.org/article/0466a8064f184043a82cbf43183f10f0
Autor:
Wyn Williams, Lesleis Nagy, Adrian R. Muxworthy, Andrew P. Roberts, David Heslop, Miguel A. Valdez-Grijalva
Publikováno v:
Valdez-Grijalva, M A, Nagy, L, Muxworthy, A R, Williams, W, Roberts, A P & Heslop, D 2020, ' Micromagnetic simulations of first-order reversal curve (FORC) diagrams of framboidal greigite ', Geophysical Journal International, vol. 222, no. 2 . https://doi.org/10.1093/gji/ggaa241
SUMMARY Greigite is a sensitive environmental indicator and occurs commonly in nature as magnetostatically interacting framboids. Until now only the magnetic response of isolated non-interacting greigite particles have been modelled micromagnetically
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::214f6e7d494213da2e28fea5e76ee898
https://doi.org/10.1093/gji/ggaa241
https://doi.org/10.1093/gji/ggaa241
Publikováno v:
Valdez-Grijalva, M A, Nagy, L, Muxworthy, A R, Williams, W & Fabian, K 2017, ' The magnetic structure and palaeomagnetic recording fidelity of sub-micron greigite (Fe3S4) ', Earth and Planetary Science Letters . https://doi.org/10.1016/j.epsl.2017.12.015
We present the results of a finite-element micromagnetic model of 30 nm to 300 nm greigite (Fe3S4) grains with a variety of equant morphologies. This grain size range covers the magnetic single-domain (SD) to pseudo single-domain (PSD) transition, an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e259fdcd27d7d23fbb68eb2eb6826c1b
https://doi.org/10.1016/j.epsl.2017.12.015
https://doi.org/10.1016/j.epsl.2017.12.015
Autor:
Rongdong Deng, Adrian R. Muxworthy, Jiangang Ku, Weiran Zuo, Miguel A. Valdez-Grijalva, Qidi Chen, Hua Lin
Publikováno v:
Geosciences, Vol 9, Iss 3, p 133 (2019)
Geosciences
Volume 9
Issue 3
Geosciences
Volume 9
Issue 3
We determine the role of particle shape in the type of magnetic extraction processes used in mining. We use a micromagnetic finite element method (FEM) to analyze the effect of external magnetic fields on the magnetic structures of sub-micron magneti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a1ae58b716767f3fff7369abfd248124
https://doi.org/10.3390/geosciences9030133
https://doi.org/10.3390/geosciences9030133
Autor:
Francisco Miguel Lechuga Lagos, Ambrosio Aquino López, Miguel Ángel Valdez Grijalva, José Oscar Campos Enríquez
Publikováno v:
Geofísica Internacional, Vol 63, Iss 2, Pp 817-834 (2024)
We propose a new approach to improve spectral gamma-ray (SGR) logging forward modeling by considering the radioactive minerals present in the rock as gamma-ray sources. This is based on the radioactive attenuation theory. The assumptions are: 1) mine
Externí odkaz:
https://doaj.org/article/1477a3ed7fa947c1b8ab53bb8b1c5d04