2026-09-24 合肥物質科学研究院（HFIPS）
Lunar topography and magnetic anomalies. (Image by LI Long)
＜関連情報＞
- https://english.hf.cas.cn/nr/bth/202609/t20260924_1201486.html
- https://www.pnas.org/doi/10.1073/pnas.2608395123
天然月面γ-Feの磁気渦状態 Magnetic vortex state of natural lunar γ-Fe
Pengfei Liu, Ziliang Jin, Zheng Gong, +11 , and Ann M. Hirt
Proceedings of the National Academy of Sciences Published:September 16, 2026
DOI:https://doi.org/10.1073/pnas.2608395123
Abstract
On the lunar surface α-Fe and Fe-Ni alloys are widespread and the dominant carriers of the lunar remanent magnetization. Metallic γ-Fe, however, is stable only at high temperatures and has not been documented in lunar samples. Here we report the identification of ambient stable γ-Fe preserved as nanometer-scale particles in Chang’e-6 impact glass fragments from the South Pole-Aitken Basin. Electron holography analyses reveal that these γ-Fe particles have a magnetic vortex domain state. Based on these results, we propose that the formation and preservation of γ-Fe at lunar surface temperature requires incorporation of trace γ-phase-stabilizing elements together with extremely rapid quenching during lunar impact processes. Our findings provide a basis for understanding the lunar core dynamo evolution and impact-induced magnetic recording mechanisms.
