Superconductivity and ferromagnetism in EuFe sub(2)(As sub(1-x)P sub(x)) sub(2)

Superconductivity and ferromagnetism are two antagonistic cooperative phenomena, which makes it difficult for them to coexist. Here we demonstrate experimentally that they do coexist in EuFe sub(2)(As sub(1-x)P sub(x)) sub(2) with 0.2 [< or =]x [< or =]0.4, in which superconductivity is associ...

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Published inJournal of physics. Condensed matter Vol. 23; no. 46; pp. 1 - 5
Main Authors Cao, Guanghan, Xu, Shenggao, Ren, Zhi, Jiang, Shuai, Feng, Chunmu, Xu, Zhu'an
Format Journal Article
LanguageEnglish
Published 23.11.2011
Subjects
Condensed matter
Ferromagnetism
Iron
Magnetic transitions
Order disorder
Robustness
Superconductivity
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Summary:Superconductivity and ferromagnetism are two antagonistic cooperative phenomena, which makes it difficult for them to coexist. Here we demonstrate experimentally that they do coexist in EuFe sub(2)(As sub(1-x)P sub(x)) sub(2) with 0.2 [< or =]x [< or =]0.4, in which superconductivity is associated with Fe 3d electrons and ferromagnetism comes from the long-range ordering of Eu 4f moments via Ruderman-Kittel-Kasuya-Yosida (RKKY) interactions. The coexistence features large saturated ferromagnetic moments, high and comparable superconducting and magnetic transition temperatures, and broad coexistence ranges in temperature and field. We ascribe this unusual phenomenon to the robustness of superconductivity as well as the multi-orbital character of iron pnictides.
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ISSN:0953-8984
1361-648X
DOI:10.1088/0953-8984/23/46/464204