globalchange  > 气候变化与战略
DOI: 10.1073/pnas.1918056117
论文题名:
Superconductivity found in meteorites
作者: Wampler J.; Thiemens M.; Cheng S.; Zhu Y.; Schuller I.K.
刊名: Proceedings of the National Academy of Sciences of the United States of America
ISSN: 0027-8424
出版年: 2020
卷: 117, 期:14
起始页码: 7645
结束页码: 7649
语种: 英语
英文关键词: Extraterrestrial ; Meteorites ; Superconductivity
Scopus关键词: indium ; iron ; lead ; mineral ; mundrabilla ; tin ; unclassified drug ; ureilite ; Article ; astronomy ; cold climate ; conductometry ; cosmological phenomena ; energy dispersive X ray spectroscopy ; environmental factor ; magnetic field ; magnetic field modulated microwave spectroscopy ; priority journal ; spectroscopy ; superconductivity ; transition temperature ; transmission electron microscopy ; vibrating sample magnetometry
英文摘要: Meteorites can contain a wide range of material phases due to the extreme environments found in space and are ideal candidates to search for natural superconductivity. However, meteorites are chemically inhomogeneous, and superconducting phases in them could potentially be minute, rendering detection of these phases difficult. To alleviate this difficulty, we have studied meteorite samples with the ultrasensitive magnetic field modulated microwave spectroscopy (MFMMS) technique [J. G. Ramírez, A. C. Basaran, J. de la Venta, J. Pereiro, I. K. Schuller, Rep. Prog. Phys. 77, 093902 (2014)]. Here, we report the identification of superconducting phases in two meteorites, Mundrabilla, a group IAB iron meteorite [R. Wilson, A. Cooney, Nature 213, 274-275 (1967)] and GRA 95205, a ureilite [J. N. Grossman, Meteorit. Planet. Sci. 33, A221-A239 (1998)]. MFMMS measurements detected superconducting transitions in samples from each, above 5 K. By subdividing and remeasuring individual samples, grains containing the largest superconducting fraction were isolated. The superconducting grains were then characterized with a series of complementary techniques, including vibrating-sample magnetometry (VSM), energy-dispersive X-ray spectroscopy (EDX), and numerical methods. These measurements and analysis identified the likely phases as alloys of lead, indium, and tin. © 2020 National Academy of Sciences. All rights reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/164260
Appears in Collections:气候变化与战略

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作者单位: Wampler, J., Department of Physics, University of California, San Diego, CA 92093, United States, Center for Advanced Nanoscience, University of California, San Diego, CA 92093, United States; Thiemens, M., Department of Chemistry and Biochemistry, University of California, San Diego, CA 92093, United States; Cheng, S., Condensed Matter Physics and Materials Science, Brookhaven National Laboratory, Upton, NY 11973, United States; Zhu, Y., Condensed Matter Physics and Materials Science, Brookhaven National Laboratory, Upton, NY 11973, United States; Schuller, I.K., Department of Physics, University of California, San Diego, CA 92093, United States, Center for Advanced Nanoscience, University of California, San Diego, CA 92093, United States

Recommended Citation:
Wampler J.,Thiemens M.,Cheng S.,et al. Superconductivity found in meteorites[J]. Proceedings of the National Academy of Sciences of the United States of America,2020-01-01,117(14)
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