No long-range magnetic order in ε-iron down to 160 mK
Year: 2025
Type: article
Abstract: Epsilon-Fe, the high-pressure phase of elemental iron, is generally regarded as non-magnetic. However, theoretical predictions and experiments suggest that a residual magnetic moment exists, which might order at sufficiently low temperatures. Here, we report neutron diffraction data at 20 GPa down to 160 mK to probe this possibility. We find no magnetic long-range order under these conditions and no evidence for magnetic diffuse scattering, a result that considerably constrains the size of the magnetic moment, the nature of the putative magnetic order, and its stability range.
Source: Applied Physics Letters
DOI: 10.1063/5.0299650
Authors: S. Klotz, M. d'Astuto, V. Joyet, H. Kobayashi, E. Lelièvre-Berna, J. Maurice, C. Payre, S. Savvin
Institutions: Centre National de la Recherche Scientifique, Sorbonne Université, Institut de minéralogie, de physique des matériaux et de cosmochimie, Institut Néel, Institut Laue-Langevin, The University of Tokyo, Consejo Superior de Investigaciones Científicas, Universidad de Zaragoza, Instituto de Nanociencia y Materiales de Aragón
Language: English
Subfield: Geophysics
Field: Earth and Planetary Sciences
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W7106625618