Superconductivity in Se-doped new materials EuSr2Bi2S4F4 and Eu2SrBi2S4F4

Zeba Haque; Gohil S. Thakur; Rainer Pöttgen; Ganesan Kalai Selvan; Rangasamy Parthasarathy; Sonachalam Arumugam; Laxmi Chand Gupta; Ashok Kumar Ganguli

Superconductivity in Se-doped new materials EuSr2Bi2S4F4 and Eu2SrBi2S4F4

Superconductivity 2016-12-13 v1

Authors: Zeba Haque , Gohil S. Thakur , Rainer Pöttgen , Ganesan Kalai Selvan , Rangasamy Parthasarathy , Sonachalam Arumugam , Laxmi Chand Gupta , Ashok Kumar Ganguli

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Abstract

From our powder x ray diffraction pattern, electrical transport and magnetic studies we report the effect of isovalent Se substitution at S sites in the newly discovered systems EuSr2Bi2S4F4 and Eu2SrBi2S4F4. We have synthesized two new variants of 3244 type superconductor with Eu replaced by Sr which is reported elsewhere [Z. Haque et. al.]. We observe superconductivity at Tc 2.9 K (resistivity) and 2.3 K (susceptibility) in EuSr2Bi2S4-xSexF4 series for x = 2. In the other series Eu2SrBi2S4-xSexF4, two materials (x= 1.5; Tc = 2.6 K and x = 2; Tc = 2.75 K) exhibit superconductivity.

Keywords

superconductivity high-temperature superconductivity iron-based superconductor

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@article{arxiv.1612.03415,
  title  = {Superconductivity in Se-doped new materials EuSr2Bi2S4F4 and Eu2SrBi2S4F4},
  author = {Zeba Haque and Gohil S. Thakur and Rainer Pöttgen and Ganesan Kalai Selvan and Rangasamy Parthasarathy and Sonachalam Arumugam and Laxmi Chand Gupta and Ashok Kumar Ganguli},
  journal= {arXiv preprint arXiv:1612.03415},
  year   = {2016}
}

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4 pages, 9 figures

Superconductivity in Se-doped new materials EuSr2Bi2S4F4 and Eu2SrBi2S4F4

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