Anisotropic superconductivity in Eu(Fe0.75Ru0.25) 2As2 ferromagnetic superconductor

Wen He Jiao; Qian Tao; Jin Ke Bao; Yun Lei Sun; Chun Mu Feng; Zhu An Xu; I. Nowik; I. Felner; Guang Han Cao

doi:10.1209/0295-5075/95/67007

Anisotropic superconductivity in Eu(Fe_0.75Ru_0.25) ₂As₂ ferromagnetic superconductor

Wen He Jiao^*
, Qian Tao
, Jin Ke Bao
, Yun Lei Sun
, Chun Mu Feng
, Zhu An Xu
, I. Nowik
, I. Felner
, Guang Han Cao

^*Corresponding author for this work

Racah Institute of Physics

Research output: Contribution to journal › Article › peer-review

57 Scopus citations

Abstract

We report an unprecedented anisotropic superconductivity in Eu(Fe _0.75Ru_0.25)₂As₂ single crystals. The in-plane resistivity (ρ_ab) and vertical magnetization (M _c) show a superconducting transition at T_SC=23 K with zero resistance and magnetic shielding, respectively. In comparison, the out-of-plane resistivity (ρ_c) does not go to zero, neither does the horizontal magnetization (M_ab) show the shielding against external fields. Magnetization and Mössbauer data indicate that the Eu ²⁺ spins order ferromagnetically below 19.5 K with the moments tilted 20^° from the c-axis. Our result suggests spontaneous-vortex phase and/or Fulde-Ferrell-Larkin-Ovchinnikov state in the ferromagnetic superconductor.

Original language	English
Article number	67007
Journal	Lettere Al Nuovo Cimento
Volume	95
Issue number	6
DOIs	https://doi.org/10.1209/0295-5075/95/67007
State	Published - Sep 2011

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title = "Anisotropic superconductivity in Eu(Fe0.75Ru0.25) 2As2 ferromagnetic superconductor",

abstract = "We report an unprecedented anisotropic superconductivity in Eu(Fe 0.75Ru0.25)2As2 single crystals. The in-plane resistivity (ρab) and vertical magnetization (M c) show a superconducting transition at TSC=23 K with zero resistance and magnetic shielding, respectively. In comparison, the out-of-plane resistivity (ρc) does not go to zero, neither does the horizontal magnetization (Mab) show the shielding against external fields. Magnetization and M{\"o}ssbauer data indicate that the Eu 2+ spins order ferromagnetically below 19.5 K with the moments tilted 20° from the c-axis. Our result suggests spontaneous-vortex phase and/or Fulde-Ferrell-Larkin-Ovchinnikov state in the ferromagnetic superconductor.",

author = "Jiao, \{Wen He\} and Qian Tao and Bao, \{Jin Ke\} and Sun, \{Yun Lei\} and Feng, \{Chun Mu\} and Xu, \{Zhu An\} and I. Nowik and I. Felner and Cao, \{Guang Han\}",

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TY - JOUR

T1 - Anisotropic superconductivity in Eu(Fe0.75Ru0.25) 2As2 ferromagnetic superconductor

AU - Jiao, Wen He

AU - Tao, Qian

AU - Bao, Jin Ke

AU - Sun, Yun Lei

AU - Feng, Chun Mu

AU - Xu, Zhu An

AU - Nowik, I.

AU - Felner, I.

AU - Cao, Guang Han

PY - 2011/9

Y1 - 2011/9

N2 - We report an unprecedented anisotropic superconductivity in Eu(Fe 0.75Ru0.25)2As2 single crystals. The in-plane resistivity (ρab) and vertical magnetization (M c) show a superconducting transition at TSC=23 K with zero resistance and magnetic shielding, respectively. In comparison, the out-of-plane resistivity (ρc) does not go to zero, neither does the horizontal magnetization (Mab) show the shielding against external fields. Magnetization and Mössbauer data indicate that the Eu 2+ spins order ferromagnetically below 19.5 K with the moments tilted 20° from the c-axis. Our result suggests spontaneous-vortex phase and/or Fulde-Ferrell-Larkin-Ovchinnikov state in the ferromagnetic superconductor.

AB - We report an unprecedented anisotropic superconductivity in Eu(Fe 0.75Ru0.25)2As2 single crystals. The in-plane resistivity (ρab) and vertical magnetization (M c) show a superconducting transition at TSC=23 K with zero resistance and magnetic shielding, respectively. In comparison, the out-of-plane resistivity (ρc) does not go to zero, neither does the horizontal magnetization (Mab) show the shielding against external fields. Magnetization and Mössbauer data indicate that the Eu 2+ spins order ferromagnetically below 19.5 K with the moments tilted 20° from the c-axis. Our result suggests spontaneous-vortex phase and/or Fulde-Ferrell-Larkin-Ovchinnikov state in the ferromagnetic superconductor.

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ER -

Anisotropic superconductivity in Eu(Fe_0.75Ru_0.25) ₂As₂ ferromagnetic superconductor

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