Magnetic susceptibility of HCP iron and seismic anisotropy of the Earth’s core
The seismic anisotropy of the Earth was proposed to be due to a preferred orientation of HCP iron crystals that constitutes the dominating element in the core. The suggested mechanism involves the anisotropy of the magnetic susceptibility χ of HCP iron, and it is argued that if χ is sufficiently ani...
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| Published in: | Физика и техника высоких давлений |
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| Date: | 2003 |
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| Format: | Article |
| Language: | English |
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Донецький фізико-технічний інститут ім. О.О. Галкіна НАН України
2003
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| Online Access: | https://nasplib.isofts.kiev.ua/handle/123456789/167954 |
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| Cite this: | Magnetic susceptibility of HCP iron and seismic anisotropy of the Earth’s core / G.E. Grechnev, R. Ahuja, O. Eriksson // Физика и техника высоких давлений. — 2003. — Т. 13, № 1. — С. 14-18. — Бібліогр.: 19 назв. — англ. |
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Grechnev, G.E. Ahuja, R. Eriksson, O. 2020-04-17T19:58:10Z 2020-04-17T19:58:10Z 2003 Magnetic susceptibility of HCP iron and seismic anisotropy of the Earth’s core / G.E. Grechnev, R. Ahuja, O. Eriksson // Физика и техника высоких давлений. — 2003. — Т. 13, № 1. — С. 14-18. — Бібліогр.: 19 назв. — англ. 0868-5924 PACS: 75.10.Lp, 75.20.-g, 91.25.Ey, 91.35.Cb https://nasplib.isofts.kiev.ua/handle/123456789/167954 The seismic anisotropy of the Earth was proposed to be due to a preferred orientation of HCP iron crystals that constitutes the dominating element in the core. The suggested mechanism involves the anisotropy of the magnetic susceptibility χ of HCP iron, and it is argued that if χ is sufficiently anisotropic, a preferential orientation of the HCP crystals may occur. We have calculated ab initio χ and the anisotropy energy of HCP iron for pressures and temperatures corresponding to the Earth's inner core conditions. Our calculations demonstrate that χ is smaller when the field is along the c-axis of HCP iron. Hence, a toroidal magnetic field is shown to orient HCP Fe with c-axis along the north–south direction, and combined with the data on elastic constants this explains the seismic anisotropy. en Донецький фізико-технічний інститут ім. О.О. Галкіна НАН України Физика и техника высоких давлений Magnetic susceptibility of HCP iron and seismic anisotropy of the Earth’s core Article published earlier |
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Digital Library of Periodicals of National Academy of Sciences of Ukraine |
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DSpace DC |
| title |
Magnetic susceptibility of HCP iron and seismic anisotropy of the Earth’s core |
| spellingShingle |
Magnetic susceptibility of HCP iron and seismic anisotropy of the Earth’s core Grechnev, G.E. Ahuja, R. Eriksson, O. |
| title_short |
Magnetic susceptibility of HCP iron and seismic anisotropy of the Earth’s core |
| title_full |
Magnetic susceptibility of HCP iron and seismic anisotropy of the Earth’s core |
| title_fullStr |
Magnetic susceptibility of HCP iron and seismic anisotropy of the Earth’s core |
| title_full_unstemmed |
Magnetic susceptibility of HCP iron and seismic anisotropy of the Earth’s core |
| title_sort |
magnetic susceptibility of hcp iron and seismic anisotropy of the earth’s core |
| author |
Grechnev, G.E. Ahuja, R. Eriksson, O. |
| author_facet |
Grechnev, G.E. Ahuja, R. Eriksson, O. |
| publishDate |
2003 |
| language |
English |
| container_title |
Физика и техника высоких давлений |
| publisher |
Донецький фізико-технічний інститут ім. О.О. Галкіна НАН України |
| format |
Article |
| description |
The seismic anisotropy of the Earth was proposed to be due to a preferred orientation of HCP iron crystals that constitutes the dominating element in the core. The suggested mechanism involves the anisotropy of the magnetic susceptibility χ of HCP iron, and it is argued that if χ is sufficiently anisotropic, a preferential orientation of the HCP crystals may occur. We have calculated ab initio χ and the anisotropy energy of HCP iron for pressures and temperatures corresponding to the Earth's inner core conditions. Our calculations demonstrate that χ is smaller when the field is along the c-axis of HCP iron. Hence, a toroidal magnetic field is shown to orient HCP Fe with c-axis along the north–south direction, and combined with the data on elastic constants this explains the seismic anisotropy.
|
| issn |
0868-5924 |
| url |
https://nasplib.isofts.kiev.ua/handle/123456789/167954 |
| citation_txt |
Magnetic susceptibility of HCP iron and seismic anisotropy of the Earth’s core / G.E. Grechnev, R. Ahuja, O. Eriksson // Физика и техника высоких давлений. — 2003. — Т. 13, № 1. — С. 14-18. — Бібліогр.: 19 назв. — англ. |
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AT grechnevge magneticsusceptibilityofhcpironandseismicanisotropyoftheearthscore AT ahujar magneticsusceptibilityofhcpironandseismicanisotropyoftheearthscore AT erikssono magneticsusceptibilityofhcpironandseismicanisotropyoftheearthscore |
| first_indexed |
2025-11-28T14:12:36Z |
| last_indexed |
2025-11-28T14:12:36Z |
| _version_ |
1850853760694222848 |