Re-entrance of resistivity due to the interplay of superconductivity and magnetism in $\ce{Eu_{0.73}Ca_{0.27}(Fe_{0.87}Co_{0.13})2As2}$

By simultaneous Co and Ca-doping we were able to obtain an $\ce E u F e 2 A s 2$ -based compound with superconductivity appearing above the antiferromagnetic order of $\ce E u^{2 +}$ magnetic moments. However, as soon as the antiferromagnetic order appears a re-entrance behavior is observed \textemdash{} instead of zero resistivity and diamagnetic signal down to the temperature of \unit[2]{K}. By investigating magnetization, ac susceptibility and electrical transport properties of $\ce E u_{0.73} C a_{0.27} (F e_{0.87} C o_{0.13}) 2 A s 2$ and comparing them to previously studied Mössbauer effect and neutron scattering measurements of this and similar compounds an explanation of such behavior is proposed.

Re-entrance of resistivity due to the interplay of superconductivity and magnetism in $\ce E u_{0.73} C a_{0.27} (F e_{0.87} C o_{0.13}) 2 A s 2$

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Re-entrance of resistivity due to the interplay of superconductivity and magnetism in $\ce E u_{0.73} C a_{0.27} (F e_{0.87} C o_{0.13}) 2 A s 2$

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Re-entrance of resistivity due to the interplay of superconductivity and magnetism in \ceEu0.73Ca0.27(Fe0.87Co0.13)2As2\ceEu0.73​Ca0.27​(Fe0.87​Co0.13​)2As2

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Re-entrance of resistivity due to the interplay of superconductivity and magnetism in \ceEu0.73Ca0.27(Fe0.87Co0.13)2As2\ceEu0.73​Ca0.27​(Fe0.87​Co0.13​)2As2

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Re-entrance of resistivity due to the interplay of superconductivity and magnetism in $\ce E u_{0.73} C a_{0.27} (F e_{0.87} C o_{0.13}) 2 A s 2$

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Re-entrance of resistivity due to the interplay of superconductivity and magnetism in $\ce E u_{0.73} C a_{0.27} (F e_{0.87} C o_{0.13}) 2 A s 2$

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