Effect of substitution of Ca2+ for Eu2+ on pressure-induced superconductivity in EuFe2As2

Akihiro Mitsuda, Tomohiro Matoba, Satoshi Seike, Fumihiro Ishikawa, Yuh Yamada, Hirofumi Wada

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Abstract

To elucidate competition between the Fe-based superconductivity and the antiferromagnetic order of Eu2+, the electrical resistivity of Eu0.85Ca0.15Fe2As2 under high pressure is presented. Under ambient pressure, the Fe-based spin-density-wave (SDW) transition and the antiferromagnetic ordering (AFM) of Eu2+ are observed at TSDW = 190 K and TN = 17 K, respectively. With applying pressure, the Fe-based superconductivity with Tc ∼ 25 K appears above 1.5 GPa, accompanying collapse of the SDW transition. Compared with EuFe2As2, Tc is close to T N, which implies strong competition between the superconductivity and the AFM. This competition would lead to non-zero resistivity at lowest temperature.

Original languageEnglish
Article numberSA117
Journaljournal of the physical society of japan
Volume80
Issue numberSUPPL. A
DOIs
Publication statusPublished - Jul 1 2011

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superconductivity
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electrical resistivity

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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Effect of substitution of Ca2+ for Eu2+ on pressure-induced superconductivity in EuFe2As2 . / Mitsuda, Akihiro; Matoba, Tomohiro; Seike, Satoshi; Ishikawa, Fumihiro; Yamada, Yuh; Wada, Hirofumi.

In: journal of the physical society of japan, Vol. 80, No. SUPPL. A, SA117, 01.07.2011.

Research output: Contribution to journalArticle

Mitsuda, Akihiro ; Matoba, Tomohiro ; Seike, Satoshi ; Ishikawa, Fumihiro ; Yamada, Yuh ; Wada, Hirofumi. / Effect of substitution of Ca2+ for Eu2+ on pressure-induced superconductivity in EuFe2As2 In: journal of the physical society of japan. 2011 ; Vol. 80, No. SUPPL. A.
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AU - Yamada, Yuh

AU - Wada, Hirofumi

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