a simple superconductor?
a simple superconductor?
a simple superconductor?
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• Freshly polished iron pieces and<br />
selenium shot<br />
• Sealed in silica tubes under<br />
vacuum with a piece of cleaned<br />
carbon<br />
• Sealed in a second evacuated<br />
silica ampoule<br />
• Complex annealing procedure<br />
• Small pieces were then loaded<br />
into small silica ampoules and<br />
annealed at various temperatures<br />
300–500 °C or 2 days followed by<br />
quenching in −13 °C brine.<br />
Protection from oxidation in air by<br />
storage in an argon glove box.<br />
Fe 1.01 Se<br />
McQueen et al. Phys. Rev. B 79 (2009) 014522<br />
ICMR Summer School on Novel Superconductors 2009
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