EuFe 2As 2 under high pressure: An antiferromagnetic bulk superconductor

Taichi Terashima, Motoi Kimata, Hidetaka Satsukawa, Atsushi Harada, Kaori Hazama, Shinya Uji, Hiroyuki S. Suzuki, Takehiko Matsumoto, Keizo Murata

Research output: Contribution to journalArticle

100 Citations (Scopus)

Abstract

We report the ac magnetic susceptibility X ac and resistivity ρ measurements of EuFe 2As 2 under high pressure P. By observing nearly 100% superconducting shielding and zero resistivity at P = 28 kbar, we establish that P-induced superconductivity occurs at T c ∼ 30K in EuFe 2As 2. ρ shows an anomalous nearly linear temperature dependence from room temperature down to T c at the same P. X ac indicates that an antiferromagnetic order of Eu 2+ moments with T n ∼ 20 K persists in the superconducting phase. The temperature dependence of the upper critical field is also determined.

Original languageEnglish
Article number083701
Journaljournal of the physical society of japan
Volume78
Issue number8
DOIs
Publication statusPublished - 2009 Aug 1
Externally publishedYes

Keywords

  • Iron pnictides
  • Pressure-induced superconductivity
  • Susceptibility
  • Upper critical field

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Terashima, T., Kimata, M., Satsukawa, H., Harada, A., Hazama, K., Uji, S., Suzuki, H. S., Matsumoto, T., & Murata, K. (2009). EuFe 2As 2 under high pressure: An antiferromagnetic bulk superconductor. journal of the physical society of japan, 78(8), [083701]. https://doi.org/10.1143/JPSJ.78.083701