Compare · Superconductors
SmFeAsO1−xFx vs MgB2
RANKED BY CRITICAL TEMPERATURE TC AT AMBIENT PRESSURE (KELVIN)
#5 VS #6
CHECKED 06 SEPT 2026
Side by side
Verdict
SmFeAsO1−xFx ranks #5 of 8 on Critical temperature Tc at ambient pressure (kelvin) (55 K); MgB2 ranks #6 (39 K).
Rank 05 of 8 · leads
Critical temperature Tc at ambient pressure (kelvin)
55 K
MakerRen / Zhao group
Date2008
Verified04 Sept 2026
Evidence
Ren, Che, Dong, Yang, Dai, Fang, Zhong, Chen, Wang, Sun, Wen, Xu, Zhao, Chin. Phys. Lett. 25, 2215 (2008): fluorine-doped samarium iron arsenide with Tc up to 55 K at ambient pressure. Highest well-replicated 1111-family iron-pnictide Tc; Kamihara et al. JACS 2008 LaFeAsO:F at 26 K is the parent discovery and is not listed separately.Rank 06 of 8
Critical temperature Tc at ambient pressure (kelvin)
39 K
MakerAkimitsu group
Date2001
Verified04 Sept 2026
Evidence
Nagamatsu, Nakagawa, Muranaka, Zenitani, Akimitsu, Nature 410, 63–64 (2001): superconductivity at 39 K in magnesium diboride at ambient pressure. Binary intermetallic; widely replicated and used in wires.Try another pair
Source Peer-reviewed papers: Nature 365, 323 (1993); Phys. Rev. Lett. 60, 2539 (1988); Jpn. J. Appl. Phys. 27, L209 (1988); Chin. Phys. Lett. 25,…
Last checked 06 Sept 2026