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Phase diagram of pnictide superconductors

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Superconductivity <strong>of</strong> Co doped Ba122– TF-μSR<br />

• Superfluid density (full line<br />

shape analysis) for field<br />

applied in different direction.<br />

• Pronounced anisotropy <strong>of</strong> the<br />

penetration depth λ.<br />

• Assuming λ a = λ b one can<br />

calculate the low temperature<br />

values:<br />

• λ a (T=0) = 220 nm<br />

• λ c (T=0) = 1100 nm<br />

H. Luetkens, C. Nacke et al., in preparation

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