Superconductivity Induced by Phosphorus Doping and Its Coexistence with Ferromagnetism in EuFe2(As0.7P0.3)2

Zhi Ren, Qian Tao, Shuai Jiang, Chunmu Feng, Cao Wang, Jianhui Dai, Guanghan Cao, and Zhu’an Xu
Phys. Rev. Lett. 102, 137002 – Published 1 April 2009

Abstract

We have studied EuFe2(As0.7P0.3)2 by the measurements of x-ray diffraction, electrical resistivity, thermopower, magnetic susceptibility, magnetoresistance, and specific heat. Partial substitution of As with P results in the shrinkage of lattice, which generates chemical pressure to the system. It is found that EuFe2(As0.7P0.3)2 undergoes a superconducting transition at 26 K, followed by ferromagnetic ordering of Eu2+ moments at 20 K. This finding is the first observation of superconductivity stabilized by internal chemical pressure, and supplies a rare example showing the coexistence of superconductivity and ferromagnetism in the ferroarsenide family.

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  • Received 19 January 2009

DOI:https://doi.org/10.1103/PhysRevLett.102.137002

©2009 American Physical Society

Authors & Affiliations

Zhi Ren1, Qian Tao1, Shuai Jiang1, Chunmu Feng2, Cao Wang1, Jianhui Dai1, Guanghan Cao1,*, and Zhu’an Xu1,†

  • 1Department of Physics, Zhejiang University, Hangzhou 310027, China
  • 2Test and Analysis Center, Zhejiang University, Hangzhou 310027, China

  • *ghcao@zju.edu.cn
  • zhuan@zju.edu.cn

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Vol. 102, Iss. 13 — 3 April 2009

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