气候变化领域集成服务门户(CCPortal): Superconductivity found in meteorites

CCPortal

DOI	10.1073/pnas.1918056117
	Superconductivity found in meteorites
	Wampler J.; Thiemens M.; Cheng S.; Zhu Y.; Schuller I.K.
发表日期	2020
ISSN	0027-8424
起始页码	7645
结束页码	7649
卷号	117 期号:14
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.
英文关键词	Extraterrestrial; Meteorites; Superconductivity
语种	英语
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
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/161004
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
推荐引用方式 GB/T 7714	Wampler J.,Thiemens M.,Cheng S.,et al. Superconductivity found in meteorites[J],2020,117(14).
APA	Wampler J.,Thiemens M.,Cheng S.,Zhu Y.,&Schuller I.K..(2020).Superconductivity found in meteorites.Proceedings of the National Academy of Sciences of the United States of America,117(14).
MLA	Wampler J.,et al."Superconductivity found in meteorites".Proceedings of the National Academy of Sciences of the United States of America 117.14(2020).