|
1
|
Kovács A, Lewis LH, Palanisamy D, Denneulin T, Schwedt A, Scott ER, Gault B, Raabe D, Dunin-Borkowski RE, Charilaou M. Discovery and Implications of Hidden Atomic-Scale Structure in a Metallic Meteorite. Nano Lett 2021; 21:8135-8142. [PMID: 34529916 PMCID: PMC8519181 DOI: 10.1021/acs.nanolett.1c02573] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Indexed: 06/13/2023]
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.
Collapse
Affiliation(s)
- András Kovács
- Ernst
Ruska-Centre for Microscopy and Spectroscopy with Electrons, Peter Grünberg Institute, Forschungszentrum
Jülich GmbH, 52425 Jülich, Germany
| | - Laura H. Lewis
- Department
of Chemical Engineering, Northeastern University, Boston, Massachusetts 02115, United States
- Department
of Mechanical and Industrial Engineering, Northeastern University, Boston, Massachusetts 02115, United States
| | | | - Thibaud Denneulin
- Ernst
Ruska-Centre for Microscopy and Spectroscopy with Electrons, Peter Grünberg Institute, Forschungszentrum
Jülich GmbH, 52425 Jülich, Germany
| | - Alexander Schwedt
- Central
Facility for Electron Microscopy, RWTH Aachen University, 52074 Aachen, Germany
| | - Edward R.D. Scott
- Hawaii
Institute of Geophysics and Planetology, University of Hawaii, Honolulu, Hawaii 96822, United States
| | - Baptiste Gault
- Max-Planck-Institut
für Eisenforschung, 40237 Düsseldorf, Germany
- Department
of Materials, Royal School of Mines, Imperial
College London, London, SW7 2BP, U.K.
| | - Dierk Raabe
- Max-Planck-Institut
für Eisenforschung, 40237 Düsseldorf, Germany
| | - Rafal E. Dunin-Borkowski
- Ernst
Ruska-Centre for Microscopy and Spectroscopy with Electrons, Peter Grünberg Institute, Forschungszentrum
Jülich GmbH, 52425 Jülich, Germany
| | - Michalis Charilaou
- Department
of Physics, University of Louisiana at Lafayette, Lafayette, Louisiana 70504, United States
| |
Collapse
|
|
2
|
Baker SH, Roy M, Thornton SC, Binns C. Realizing high magnetic moments in fcc Fe nanoparticles through atomic structure stretch. J Phys Condens Matter 2012; 24:176001. [PMID: 22469915 DOI: 10.1088/0953-8984/24/17/176001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
We describe the realization of a high moment state in fcc Fe nanoparticles through a controlled change in their atomic structure. Embedding Fe nanoparticles in a Cu(1-x)Au(x) matrix causes their atomic structure to switch from bcc to fcc. Extended x-ray absorption fine structure (EXAFS) measurements show that the structure in both the matrix and the Fe nanoparticles expands as the amount of Au in the matrix is increased, with the data indicating a tetragonal stretch in the Fe nanoparticles. The samples were prepared directly from the gas phase by co-deposition, using a gas aggregation source and MBE-type sources respectively for the nanoparticle and matrix materials. The structure change in the Fe nanoparticles is accompanied by a sharp increase in atomic magnetic moment, ultimately to values of ~2.5 ± 0.3 μ(B)/atom .
Collapse
Affiliation(s)
- S H Baker
- Department of Physics and Astronomy, University of Leicester, Leicester LE1 7RH, UK.
| | | | | | | |
Collapse
|
|
3
|
|
|
5
|
Ren H, Ryan DH. Exchange frustration and transverse spin freezing in iron-rich metallic glasses. Phys Rev B Condens Matter 1995; 51:15885-15897. [PMID: 9978568 DOI: 10.1103/physrevb.51.15885] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
|
6
|
Acet M, Zähres H, Wassermann EF, Pepperhoff W. High-temperature moment-volume instability and anti-Invar of gamma -Fe. Phys Rev B Condens Matter 1994; 49:6012-6017. [PMID: 10011580 DOI: 10.1103/physrevb.49.6012] [Citation(s) in RCA: 83] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
|
7
|
Bayer P, Müller S, Schmailzl P, Heinz K. Nonpseudomorphic and surface-reconstructed ultrathin epitaxial fcc Fe films on Cu(100). Phys Rev B Condens Matter 1993; 48:17611-17614. [PMID: 10008385 DOI: 10.1103/physrevb.48.17611] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
|
8
|
|
|
9
|
Affiliation(s)
- Ken’ichi Shimizu
- The Institute of Scientific and Industrial Research, Osaka University
| | - Tsugio Tadaki
- The Institute of Scientific and Industrial Research, Osaka University
| |
Collapse
|
|
10
|
|