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. 2017 Oct 20;8:1083. doi: 10.1038/s41467-017-01275-z

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© The Author(s) 2017

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 1 — Intermetallic compound CaFe₂As₂. a The phase diagram of CaFe₂As₂ in temperature-pressure space¹², b an optical microscope image of solution-grown single crystalline CaFe₂As₂; scale bar, 1 mm c a [001]-oriented CaFe₂As₂ micropillar with 2 μm in diameter made by Ga + focused-ion beam milling; scale bar, 1 μm