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

All issues

Volume 95 / No 6 (September 2011)

EPL, 95 6 (2011) 67007

Abstract

Issue		EPL Volume 95, Number 6, September 2011


Article Number		67007
Number of page(s)		6
Section		Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties
DOI		https://doi.org/10.1209/0295-5075/95/67007
Published online		08 September 2011

EPL, 95 (2011) 67007

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

Wen-He Jiao¹, Qian Tao¹, Jin-Ke Bao¹, Yun-Lei Sun¹, Chun-Mu Feng¹, Zhu-An Xu¹^,2, I. Nowik³, I. Felner³ and Guang-Han Cao¹^,2^a

¹ Department of Physics, Zhejiang University - Hangzhou 310027, China
² State Key Lab of Silicon Materials, Zhejiang University - Hangzhou 310027, China
³ Racah Institute of Physics, The Hebrew University - Jerusalem 91904, Israel

^a ghcao@zju.edu.cn

Received: 19 June 2011
Accepted: 8 August 2011

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 Eu²⁺ 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.

PACS: 74.70.Xa – Pnictides and chalcogenides / 74.25.F- – Transport properties / 74.25.Ha – Magnetic properties including vortex structures and related phenomena

© EPLA, 2011

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.