Peculiar properties of the ferromagnetic superconductor Eu(Fe0.91Rh0.09)2As2

Large single crystals of optimally doped Eu(Fe0.91Rh0.09)2As2 were grown by the self-flux method. Resistivity and magnetization measurements show that the compound undergoes a superconducting transition at 19.6 K, followed by a ferromagnetic ordering of the Eu2+ moments at 16.8 K. The upper critical...

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Bibliographic Details
Published in:Superconductor science & technology 2016-12, Vol.30 (2)
Main Authors: Jiao, Wen-He, Liu, Yi, Tang, Zhang-Tu, Li, Yu-Ke, Xu, Xiao-Feng, Ren, Zhi, Xu, Zhu-An, Cao, Guang-Han
Format: Article
Language:eng ; jpn
Subjects:
ferromagnetic superconductor
ferromagnetism
superconductivity
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Summary:Large single crystals of optimally doped Eu(Fe0.91Rh0.09)2As2 were grown by the self-flux method. Resistivity and magnetization measurements show that the compound undergoes a superconducting transition at 19.6 K, followed by a ferromagnetic ordering of the Eu2+ moments at 16.8 K. The upper critical fields at zero temperature are estimated to be 12.5 T and 15.1 T for fields along the ab plane and the c-axis, respectively. Moreover, anisotropy reversal of the upper critical field is observed near the magnetic ordering temperature, which may be related to the anisotropic magnetization of Eu ions and the demagnetization effect. Both ferromagnetic and superconducting features are displayed by the magnetic susceptibility and peculiar isothermal magnetization loop. Our combined results unambiguously demonstrate the coexistence of ferromagnetism and superconductivity in the title compound.
ISSN:0953-2048
1361-6668
DOI:10.1088/1361-6668/30/2/025012