Scientific Reports (Aug 2023)
Visualization of nanoscale magnetic domain states in the asteroid Ryugu
- Yuki Kimura,
- Takeharu Kato,
- Toshiaki Tanigaki,
- Tetsuya Akashi,
- Hiroto Kasai,
- Satoshi Anada,
- Ryuji Yoshida,
- Kazuo Yamamoto,
- Tomoki Nakamura,
- Masahiko Sato,
- Kana Amano,
- Mizuha Kikuiri,
- Tomoyo Morita,
- Eiichi Kagawa,
- Toru Yada,
- Masahiro Nishimura,
- Aiko Nakato,
- Akiko Miyazaki,
- Kasumi Yogata,
- Masanao Abe,
- Tatsuaki Okada,
- Tomohiro Usui,
- Makoto Yoshikawa,
- Takanao Saiki,
- Satoshi Tanaka,
- Fuyuto Terui,
- Satoru Nakazawa,
- Hisayoshi Yurimoto,
- Takaaki Noguchi,
- Ryuji Okazaki,
- Hikaru Yabuta,
- Hiroshi Naraoka,
- Kanako Sakamoto,
- Sei-ichiro Watanabe,
- Yuichi Tsuda,
- Shogo Tachibana
Affiliations
- Yuki Kimura
- Institute of Low Temperature Science, Hokkaido University
- Takeharu Kato
- Nanostructures Research Laboratory, Japan Fine Ceramics Center
- Toshiaki Tanigaki
- Research and Development Group, Hitachi, Ltd.
- Tetsuya Akashi
- Research and Development Group, Hitachi, Ltd.
- Hiroto Kasai
- Research and Development Group, Hitachi, Ltd.
- Satoshi Anada
- Nanostructures Research Laboratory, Japan Fine Ceramics Center
- Ryuji Yoshida
- Nanostructures Research Laboratory, Japan Fine Ceramics Center
- Kazuo Yamamoto
- Nanostructures Research Laboratory, Japan Fine Ceramics Center
- Tomoki Nakamura
- Department of Earth Sciences, Tohoku University
- Masahiko Sato
- Department of Earth and Planetary Science, The University of Tokyo
- Kana Amano
- Department of Earth Sciences, Tohoku University
- Mizuha Kikuiri
- Department of Earth Sciences, Tohoku University
- Tomoyo Morita
- Department of Earth Sciences, Tohoku University
- Eiichi Kagawa
- Department of Earth Sciences, Tohoku University
- Toru Yada
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency
- Masahiro Nishimura
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency
- Aiko Nakato
- National Institute of Polar Research
- Akiko Miyazaki
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency
- Kasumi Yogata
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency
- Masanao Abe
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency
- Tatsuaki Okada
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency
- Tomohiro Usui
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency
- Makoto Yoshikawa
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency
- Takanao Saiki
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency
- Satoshi Tanaka
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency
- Fuyuto Terui
- Kanagawa Institute of Technology
- Satoru Nakazawa
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency
- Hisayoshi Yurimoto
- Department of Natural History Sciences, Hokkaido University
- Takaaki Noguchi
- Division of Earth and Planetary Sciences, Kyoto University
- Ryuji Okazaki
- Department of Earth and Planetary Sciences, Kyushu University
- Hikaru Yabuta
- Graduate School of Advanced Science and Engineering, Hiroshima University
- Hiroshi Naraoka
- Department of Earth and Planetary Sciences, Kyushu University
- Kanako Sakamoto
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency
- Sei-ichiro Watanabe
- Department of Earth and Environmental Sciences, Nagoya University
- Yuichi Tsuda
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency
- Shogo Tachibana
- Department of Earth and Planetary Science, The University of Tokyo
- DOI
- https://doi.org/10.1038/s41598-023-41242-x
- Journal volume & issue
-
Vol. 13,
no. 1
pp. 1 – 9
Abstract
Abstract In the samples collected from the asteroid Ryugu, magnetite displays natural remanent magnetization due to nebular magnetic field, whereas contemporaneously grown iron sulfide does not display stable remanent magnetization. To clarify this counterintuitive feature, we observed their nanoscale magnetic domain structures using electron holography and found that framboidal magnetites have an external magnetic field of 300 A m−1, similar to the bulk value, and its magnetic stability was enhanced by interactions with neighboring magnetites, permitting a disk magnetic field to be recorded. Micrometer-sized pyrrhotite showed a multidomain magnetic structure that was unable to retain natural remanent magnetization over a long time due to short relaxation time of magnetic-domain-wall movement, whereas submicron-sized sulfides formed a nonmagnetic phase. These results show that both magnetite and sulfide could have formed simultaneously during the aqueous alteration in the parent body of the asteroid Ryugu.
