| DOI: | 10.1002/grl.51004
|
| 论文题名: | Ferromagnetism of iron under pressure to 21.5 GPa |
| 作者: | Wei Q.; Gilder S.A.
|
| 刊名: | Geophysical Research Letters
|
| ISSN: | 0094-8492
|
| EISSN: | 1944-8223
|
| 出版年: | 2013
|
| 卷: | 40, 期:19 | | 起始页码: | 5131
|
| 结束页码: | 5136
|
| 语种: | 英语
|
| 英文关键词: | core
; iron
; magnetism
; pressure
|
| Scopus关键词: | Applied magnetic fields
; Body-centered-cubic phase
; Coercivity of remanence
; core
; Different pressures
; Martensitic transitions
; Moissanite anvil cells
; Remanent magnetization
; Experiments
; Ferromagnetism
; Iron
; Magnetism
; Minerals
; Pressure
; Silicon carbide
; Remanence
; computer simulation
; experimental study
; high pressure
; inner core
; iron
; magnetic property
; magnetization
; pressure effect
; temperature effect
|
| 英文摘要: | Computational, Mössbauer, and synchrotron radiation experiments arrive at disparate conclusions regarding the magnetic state of the high-pressure, hexagonal closed packed, phase of iron, which likely comprises the bulk composition of Earth's inner core. Using a nonmagnetic, moissanite anvil cell together with a superconducting magnetometer, we measured the remanent magnetization of iron in response to applied magnetic fields under pressure up to 21.5 GPa at room temperature. Two independent experiments using different pressure transmission media reveal a higher remanent magnetization at 21.5 GPa than at initial conditions, which could be attributed to a distorted hexagonal closed packed phase grown during the martensitic transition. Upon both compression and decompression, the remanent magnetization of the body centered cubic phase increases several times over initial conditions while the coercivity of remanence remains mostly invariant with pressure. Key Points First full-vector magnetic measurements of iron to 21.5 GPa Magnetic remanence in bcc Fe increases under pressure The hcp Fe or ahcp is ferromagnetic ©2013. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84885335458&doi=10.1002%2fgrl.51004&partnerID=40&md5=4135aeb4033757342bf933c88a7d4b75
|
| Citation statistics: |
|
| 资源类型: | 期刊论文
|
| 标识符: | http://119.78.100.158/handle/2HF3EXSE/5756
|
| Appears in Collections: | 气候减缓与适应
|
|
There are no files associated with this item.
|
|
作者单位: | Department of Earth and Environmental Sciences, Ludwig Maximilians Universität, Theresienstrasse 41, Munich, 80333, Germany
|
| Recommended Citation: | |
Wei Q.,Gilder S.A.. Ferromagnetism of iron under pressure to 21.5 GPa[J]. Geophysical Research Letters,2013-01-01,40(19).
|
|
|