Figure 1

X-ray diffraction patterns for Sr1−xKxFe2As2 precursor bulk (a), as-rolled tape (b), tape annealed at low temperature (c) and tape annealed at high temperature (d).
X-ray diffraction patterns for Sr1−xKxFe2As2 precursor bulk (a), as-rolled tape (b), tape annealed at low temperature (c) and tape annealed at high temperature (d).