The Effect of Stress on Paleomagnetic Signals: A Micromagnetic Study of Magnetite's Single-Vortex Response
Zenodo (CERN European Organization for Nuclear Research)(2024)
摘要
In this study we use micromagnetic modeling to show that the magnetizations of magnetically single-vortex particles rotate toward the stress axis on the application of a differential compression stress. This is the exact opposite response to magnetically single-domain particles, which previously provided the theoretical underpinning of the effect of stress on the magnetic signals of rocks. We show that the magnetization directions of single-vortex and equant single-domain particles are altered by much lower stresses than previously predicted, c.f., 100 versus 1,000 MPa; where a change in magnetization is defined as a rotation of >3 degrees after the removal of stress. The magnetization intensity of assemblages also drops by similar to 20%-30% on the application and removal of stress of similar to 100 MPa. Given that single-vortex particles are now thought to dominate the magnetization of most rocks, future studies should account for paleomagnetic directional uncertainties and potential underestimation of the ancient magnetic field intensity.
更多查看译文
关键词
mineral magnetism,paleomagnetism,stress,single-vortex,single domain
AI 理解论文
溯源树
样例
![](https://originalfileserver.aminer.cn/sys/aminer/pubs/mrt_preview.jpeg)
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要