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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| Опубліковано в: : | Физика и техника высоких давлений |
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| Дата: | 2003 |
| Автори: | , , |
| Формат: | Стаття |
| Мова: | Англійська |
| Опубліковано: |
Донецький фізико-технічний інститут ім. О.О. Галкіна НАН України
2003
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| Онлайн доступ: | https://nasplib.isofts.kiev.ua/handle/123456789/167954 |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | 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. |
Репозитарії
Digital Library of Periodicals of National Academy of Sciences of Ukraine| _version_ | 1862606427112079360 |
|---|---|
| author | Grechnev, G.E. Ahuja, R. Eriksson, O. |
| author_facet | Grechnev, G.E. Ahuja, R. Eriksson, O. |
| 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. |
| collection | DSpace DC |
| container_title | Физика и техника высоких давлений |
| 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.
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| first_indexed | 2025-11-28T14:12:36Z |
| format | Article |
| fulltext | |
| id | nasplib_isofts_kiev_ua-123456789-167954 |
| institution | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| issn | 0868-5924 |
| language | English |
| last_indexed | 2025-11-28T14:12:36Z |
| publishDate | 2003 |
| publisher | Донецький фізико-технічний інститут ім. О.О. Галкіна НАН України |
| record_format | dspace |
| spelling | 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 |
| spellingShingle | Magnetic susceptibility of HCP iron and seismic anisotropy of the Earth’s core Grechnev, G.E. Ahuja, R. Eriksson, O. |
| title | 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_short | 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 |
| url | https://nasplib.isofts.kiev.ua/handle/123456789/167954 |
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