Journal Article

FZJ-2021-03453

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Discovery and implications of hidden atomic-scale structure in a metallic meteorite

Kovacs, A. (Corresponding author)FZJ* ; Lewis, L. H. ; Palanisamy, D. ; Denneulin, T.FZJ* ; Schwedt, A. ; Scott, E. R. D. ; Gault, B. ; Raabe, D. ; Dunin-Borkowski, R.FZJ* ; Charilaou, M. (Corresponding author)

2021
ACS Publ. Washington, DC

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Please use a persistent id in citations: http://hdl.handle.net/2128/29036  doi:10.1021/acs.nanolett.1c02573

Abstract: Iron and its alloys have made modern civilization possible, with metallic meteorites providing one of the human’s earliest sources of usable iron as well as providing a window into our solar system’s billion-year history. Here highest-resolution tools reveal the existence of a previously hidden FeNi nanophase within the extremely slowly cooled metallic meteorite NWA 6259. This new nanophase exists alongside Ni-poor and Ni-rich nanoprecipitates within a matrix of tetrataenite, the uniaxial, chemically ordered form of FeNi. The ferromagnetic nature of the nanoprecipitates combined with the antiferromagnetic character of the FeNi nanophases gives rise to a complex magnetic state that evolves dramatically with temperature. These observations extend and possibly alter our understanding of celestial metallurgy, provide new knowledge concerning the archetypal Fe–Ni phase diagram and supply new information for the development of new types of sustainable, technologically critical high-energy magnets.

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Contributing Institute(s):

1. Physik Nanoskaliger Systeme (ER-C-1)

Research Program(s):

1. 5351 - Platform for Correlative, In Situ and Operando Characterization (POF4-535) (POF4-535)
2. 3D MAGiC - Three-dimensional magnetization textures: Discovery and control on the nanoscale (856538) (856538)
3. ESTEEM3 - Enabling Science and Technology through European Electron Microscopy (823717) (823717)
4. DFG project 405553726 - TRR 270: Hysterese-Design magnetischer Materialien für effiziente Energieumwandlung (405553726) (405553726)

Appears in the scientific report 2021

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Database coverage:
; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; Essential Science Indicators ; IF >= 10 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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